Inorganic Chemistry Communications (v.13, #8)

Contents List (iii-ix).

Selective carbon–sulphur bond cleavage reaction of (3-mercapto-1,4-dioxo-1,4-dihydro-naphthalen-2-ylsulfanyl) acetic acid by copper(II) nitrate tetrahydrate at room temperature to form copper(II) complex of 2-(1,4-dihydro-2-hydroxy-1,4-dioxonaphthalen-3-ylthio) acetic acid is described.Copper(II) complexes of 2-(1,4-dihydro-2-hydroxy-1,4-dioxonaphthalen-3-ylthio)acetic acid can be prepared from carbon–sulphur bond cleavage of (3-carboxymethylsulfanyl-1,4-dioxo-1,4-dihydro-naphthalen-2-ylsulfanyl)-acetic acid by copper(II)nitrate tetrahydrate at ambient condition.Display Omitted
Keywords: C–S bond cleavage; 1,4-naphthoquinone derivatives; Metal carboxylates; Copper complexes;

A novel rhenium complex of multi-dentate ligand 2,3,5,6-tetra(2-pyridyl)pyrazine – [ReCl(tppz)(PPh3)2][ReO4] – has been synthesized and characterised spectroscopically and structurally. The electronic spectrum of [ReCl(tppz)(PPh3)2][ReO4] has been investigated at the TDDFT level employing B3LYP functional in combination with LANL2DZ.A novel rhenium complex of multi-dentate ligand 2,3,5,6-tetra(2-pyridyl)pyrazine – [ReCl(tppz)(PPh3)2]ReO4 – has been synthesized and characterised spectroscopically and structurally. The electronic spectrum of [ReCl(tppz)(PPh3)2]ReO4 has been investigated at the TDDFT level employing B3LYP functional in combination with LANL2DZ.Display Omitted
Keywords: Rhenium complexes; 2,3,5,6-Tetra(2-pyridyl)pyrazine; X-ray structure; Electronic structure; DFT calculations;

A novel molybdenum phosphate based on [Mo6P4] inorganic subunits and [Mn(H2O)2]2+ cations, Mn[Mo6O12(OH)3(PO4)(HPO4)2(H2PO4)]2[Mn(H2O)2]2(Hen)4·13H2O (en = ethyl enediamine), has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, IR spectroscopy, EPR spectrum and TGA analysis. The 3-D framework of the compound contains microporous structure with large cavities filled by mono-protonated Hen+ and water molecules. The electrochemical behavior of the compound has been also studied.The synthesis and structural characterizations of a 3-D reduced molybdenum phosphate based on Mn[Mo6P4] inorganic moieties and [Mn(H2O)2]2+ coordinated cations with large cavities (the voids constitute 23% of the volume of the solid), Mn[Mo6O12(OH)3(PO4)–(HPO4)2(H2PO4)]2[Mn(H2O)2]2 (Hen)4·13H2O (en = ethylenediamine), are presented in this communication. The electrochemical behavior of the compound has been also studied.Display Omitted
Keywords: Reduced molybdophosphate; 3-D open framework; Hydrothermal synthesis; Large cavities; Crystal structure; Electrochemical;

Temperature-controlled 1D helical and discrete Er(III) complexes based on benzimidazole-5,6-dicarboxylic acid by Lu-Xi Zhang; Chang-Jun Fan; Ping Liu; Guo-Ping Yang; Chen Ren; Rui-Ting Liu (914-918).
The reaction between ErCl3·6H2O and H2bmdc (H2bmdc = benzimidazole-5,6-dicarboxylic acid) produced two distinct complexes: 1D helical complex {[Er(Hbmdc)(bmdc)(H2O)3]·3H2O} n (1) obtained under hydrothermal condition at 160 °C and discrete complex [Er2(Hbmdc)2(bmdc)2(H2O)8]·8H2O (2) under ambient temperature, evaporated from the mother liquor of 1. The crystal structures of the complexes were determined by X-ray single-crystal diffraction. Through comparison of complexes 1 and 2, we found that enhanced temperature favors the formation of higher dimensional products and lower amount of coordinated water. Both complexes are characterized by IR, elemental analysis, X-ray powder diffraction and thermogravimetric analysis.Two new coordination compounds were constructed from ErCl3·6H2O and H2bmdc (H2bmdc = Benzimidazole-5,6-dicarboxylic acid). Through comparison of both compounds, it is found that enhanced temperature favors the formation of higher dimensional products and less coordinated water. Both complexes exhibit complicated 3D hydrogen bonding frameworks with multiple π-π stacking interactions.Display Omitted
Keywords: Benzimidazole-5,6-dicarboxylic Acid; Er(III); Hydrogen bonding; Temperature;

Synthesis and characterization of hetero-bimetallic aryloxides and application in the polymerization of lactides by Xiaobo Pan; Xiaozhe Yang; Longhai Chen; Jincai Wu; Ning Tang (919-923).
The reactions of 2,2′-ethylidene-bis(4,6-di-tert-butylphenol) (EDBPH2) with sodium/potassium and ( n Bu)2  Mg in tetrahydrofuran (THF), give [(EDBP)2  Mg][(Na)2(THF)5]·THF (1) and [(EDBP)2  Mg][(K)2(THF)5]·THF (2) in high yield. Experimental results show that sodium/potassium complexes 1 and 2 are efficient catalysts for the ring-opening polymerization of lactides. Furthermore, complexes 1 and 2 have slight isotactic selectivity for the ring-opening polymerization of rac-lactide.Display OmittedThe reaction of EDBPH2 with sodium/potassium and Mg( n Bu)2 with a molar ratio of 2:2:1 in THF give complexes of [(EDBP)2  Mg][(Na)2(THF)5]·THF(1) and [(EDBP)2  Mg][(K)2(THF)5]·THF(2). Experimental results show that sodium/potassium complexes 1 and 2 are efficient catalysts for the ring-opening polymerization of lactides.
Keywords: Sodium/potassium complexes; Ring-opening polymerization; Lactide; Isotactic selectivity;

A novel three dimensional 3d–4f heterometallic coordination framework with 2, 2′-bipyridine-3-carboxylate and oxalate ligands by Yun-Zhi Tang; He-Rui Wen; Zan Cao; Xiao-Wei Wang; Shuai Huang; Chang-Lin Yu (924-928).
The 3D heterometallic polymeric complex 1 {[Nd2Cu2(L)2 (OXA)4·2(2H2O)]·2(3H2O)} n (HL = 2, 2′-bipyridine-3-carboxyic acid, OXA = oxalate) was obtained from hydrothermal reaction of Nd2O3, Cu(ClO4)2, HL and oxalic acid in the presence of ethanol and water. X-ray single crystal diffraction investigation of the polymeric complexes {[Nd2Cu2(L)2(OXA)4·2(2H2O)]·2(3H2O)} n exhibits an interesting and novel topological structure.Each 2, 2′-bipyridine-3-cayboxylate ligand links double different Cu atoms and one Nd atom, thus resulting in the formation of a 1D ladder-like structure along the c-axis, then two neighboring Nd–O–Cu chains are further cross-linked by the O–Nd–O building units, giving rise to a 2D gourd-like “Nd4Cu2-metal-ring” nanochannel along the b axis which measures ca. 5.8 × 10.1 Å in diameter.Display Omitted
Keywords: Heterometallic polymer; Hydrothermal synthesis; Neodymium complex; Copper complex;

A triple chain coordination polymer constructed from ZnTPP and a bis(4,4′-dipyridylamine) ligand by Quan-Guo Wang; Yong-Shu Xie; Fan-Hua Zeng; Seik-Weng Ng; Wei-Hong Zhu (929-931).
A novel coordination polymer [(ZnTPP)3 L1]n·(DMF)2n 1 (ZnTPP = zinc(II) tetraphenylporphyrinate) has been hydrothermally synthesized from a tetrapyridyl ligand N,N,N′,N′-tetra(4-pyridyl)-1,4-phenylenediamine (L1) and characterized by elemental analysis, IR, and single-crystal X-ray diffraction analyses. In the crystal, L1 utilizes all four pyridyl N atoms to coordinate at the axial positions of two different ZnTPP units. The first utilizes two axial positions for coordination, and the second coordinates at only one of the axial positions. Thus, the former ZnTPP units and two pyridyl nitrogens of L1 ligands are linked alternately to afford a zigzag chain, and two of the latter porphyrin units are appended to both sides of each repeating unit of the zigzag chain by coordination to the remaining two nitrogens of each L1 ligand. Interestingly, the appended porphyrins form two straight lines at both sides of the zigzag chain by the linkage of π∙∙∙π interactions between the phenyl rings. Finally, a triple chain is formed. The solid state emission of 1 is also studied.A novel coordination polymer [(ZnTPP)3 L1]n·(DMF)2n (1) has been synthesized from a tetrapyridyl ligand L1 and tetraphenyl porphyrinato zinc(II). 1 has a triple chain structure, formed by the linkage of π∙∙∙π interactions in addition to the coordination of the pyridyl nitrogen atoms at the axial positions of ZnTPP.Display Omitted
Keywords: Coordination polymer; Tetrapyridyl ligand; Porphyrin; Crystal structure; Zinc(II);

A new 2D 5-connected coordination polymer based on 3,4-bis(pyridin-4-ylmethoxy)benzoic acid ligand by Guang-Juan Xu; Ya-Hui Zhao; Kui-Zhan Shao; Ya-Qian Lan; Peng Li; Zhong-Min Su (932-934).
A new 2D 5-connected coordination polymer [Zn3(HL2)(1,4-bdc)3] (1) (HL2  = 3,4-bis(pyridin-4-ylmethoxy)benzoic acid, 1,4-H2bdc = 1,4-benzenedicarboxylate) has been hydrothermally constructed using HL2, 1,4-bdc ligands as linear linkers and Zn3-clusters as 5-connected nodes. In addition, powder X-ray diffraction, photoluminescent property and thermogravimetric analysis for 1 are investigated in detail.Display OmittedA new 2D 5-connected coordination polymer [Zn3(HL2)(1,4-bdc)3] (1) (HL2  = 3,4-bis(pyridin-4-ylmethoxy)benzoic acid, 1,4-H2bdc = 1,4-benzenedicarboxylate) has been hydrothermally constructed using HL2, 1,4-bdc as linear linkers and Zn3-clusters as 5-connected nodes. In addition, powder X-ray diffraction, photoluminescent property and thermogravimetric analysis for 1 are investigated in detail.
Keywords: Coordination polymer; 3,4-bis(pyridin-4-ylmethoxy)benzoic acid; Crystal structure; Photoluminescent property;

Three isomorphous three-dimensional lanthanide metal–organic frameworks, [Ln2(NIPH)3(DMF)4]·(DMF)2 (Ln = Eu, Pr and Sm, and H2NIPH = 5-nitroisophthalic acid) have been synthesized under solvothermal condition and characterized by single-crystal X-ray structure diffraction, IR spectroscopy, thermogravimetric analysis (TGA), luminescent property and elemental analyses. In their structures, two lanthanide(III) ions are bridged by four carboxylate groups and chelated by another two carboxylate groups to generate a [Ln2(COO)6] dinuclear group, which serves as octahedral secondary building unit (SBU) to produce a pcu net.In this work we report three isomorphous lanthanide metal–organic frameworks. In their structures, two lanthanide (III) ions are bridged by four carboxylate groups and chelated by another two carboxylate groups to generate a [Ln2(COO)6] dinuclear group, which serves as octahedral secondary building unit (SBU) to produce a pcu net.Display Omitted
Keywords: Rare-earth; Metal–organic framework; Topology; Luminescent property;

Although several heterometallic Ln(III)–Cu(I) compounds with mixed isonicotinate(IN)/oxalate(Ox) ligands are known, only one kind of framework structure is established to date. It is inconceivable for such a complex four-component system. Two new Ln(III)–Cu(I) compounds [DyCu(IN)2(Ox)·H2O] n (1) and [EuCu(IN)2(Ox)·3H2O] n (2) with distinct structural features and photoluminescent properties are successfully synthesized under hydrothermal conditions. The results demonstrate the structural diversity of such a mixed four-component system.Two new Ln(III)–Cu(I) compounds [DyCu(IN)2(Ox)·H2O] n (1) and [EuCu(IN)2(Ox)·3H2O] n (2) with distinct structural features and photoluminescent properties are successfully synthesized under hydrothermal conditions. The results demonstrate the structural diversity of a mixed four-component system.Display Omitted
Keywords: Lanthanide; Copper; Isonicontinate; Oxalate; Photoluminescence;

Pyridines of Cs symmetry coordinated to [Pd(bipy)(pyr)2]2+ cations (bipy = 2,2′-bipyridyl; pyr = substituted pyridines) lead to syn and anti isomers due to their perpendicular orientation. Rate constants of synanti isomerizations of [Pd(bipy)(2pic)2]2+ (2pic = 2-methyl-pyridine) have been measured by quantitative 2D-EXSY NMR. Results suggest a dissociative (D) pathway involving an unsaturated 14-electrons PdII intermediate stabilized by γ-agostic interactions. Kinetic isotope effect, activation parameters, and crystal structure of the anti isomer support the D mechanism.Pyridines of Cs symmetry in [Pd(bipy)(pyr)2]2+ cations (bipy = 2,2′-bipyridyl; pyr = substituted pyridine) lead to syn and anti isomers due to their perpendicular orientation. Rate constants of synanti isomerizations of [Pd(bipy)(2pic)2]2+ (2pic = 2-methyl-pyridine) have been measured by quantitative 2D-EXSY NMR. Results suggest a dissociative (D) pathway involving an unsaturated 14-electrons PdII intermediate. Kinetic isotope effect, activation parameters and crystal structure of the anti isomer support D mechanism.Display Omitted
Keywords: EXSY NMR kinetics; Square-planar complexes; Dissociative mechanism;

Spectroscopic and computational studies on a new Pd(II)-bis(pyrazol-1-yl)methane aqua-complex by Marco Bortoluzzi; Gino Paolucci; Giuliano Annibale; Bruno Pitteri (945-948).
The new Pd(II) aqua-complex [Pd(OAc)(H2O)(BPM)]+ {BPM = bis(pyrazol-1-yl)methane, OAc = acetate} has been synthesized and isolated as perchlorate or triflate salt. NMR and DFT studies have highlighted the ability of the coordinated water to give inter- and intra-molecular hydrogen bonds.Display Omitted
Keywords: Palladium; Hydrogen bonding; Aqua-complexes; Nitrogen ligands; DFT;

Preparation and characterization of the first coordination compounds of tetrazol-2-ylacetic acid by Sergei V. Voitekhovich; Tatiyana V. Serebryanskaya; Pavel N. Gaponik; Ludmila S. Ivashkevich; Alexander S. Lyakhov; Oleg A. Ivashkevich (949-951).
Tetrazol-2-ylacetic acid (2-TzaH) was found to react with CuCl2, PdCl2, and K2PtCl4 in water giving Cu(2-Tza)2, PdCl2(2-TzaH)2·2H2O and PtCl2(2-TzaH)2, correspondingly. Obtained complexes, being the first reported examples of coordination compounds derived from 2-TzaH, have been characterized by IR spectroscopy, thermal and X-ray diffraction methods. 2-TzaH was found to act as a monodentate ligand coordinated to the metal ion via N4 atom of heteroring in palladium complex and as tridentate bridging ligand coordinated via N4 atom and two oxygen atoms in copper complex. Cu(2-Tza)2 presents 2D coordination polymer, whereas PdCl2(2-TzaH)2·2H2O is molecular complex.First coordination compounds of tetrazol-2-ylacetic acid (2-TzaH), Cu(2-Tza)2, PdCl2(2-TzaH)2·2H2O and PtCl2(2-TzaH)2 have been prepared and characterized by IR spectroscopy, thermal and X-ray diffraction methods. 2-TzaH was found to act as a monodentate ligand coordinated to the metal ion via N4 atom of heteroring in PdCl2(2-TzaH)2·2H2O and as tridentate bridging ligand coordinated via N4 atom and two oxygen atoms in Cu(2-Tza)2.Display Omitted
Keywords: Tetrazoles; Copper(II) complexes; Palladium(II) complexes; Platinum(II) complexes;

Six coordinated ruthenium(III) complexes of the type [RuX2(L)(PPh3)2] or [RuX2(L)(AsPh3)2] {where L = N-[di(alkyl/aryl)carbamothioyl]benzamide derivatives, X = Cl or Br} have been prepared by the reaction between [RuX3(PPh3)3] or [RuX3(AsPh3)3] (where X = Cl or Br) and N-[di(alkyl/aryl)carbamothioyl]benzamide derivatives in toluene and characterized by elemental analysis, spectral data (electronic, IR and EPR) and magnetic moment studies. The complexes act as efficient catalysts for the oxidation of alcohols in presence of N-methylmorpholine-N-oxide as oxidant at room temperature.New Ru(III) complexes containing N-[di(alkyl/aryl)carbamothioyl]benzamide derivatives and PPh3/AsPh3 have been synthesized and characterized. These complexes exhibited good catalytic activity for oxidation of alcohols to carbonyl compounds in presence of NMO.Display Omitted
Keywords: Ruthenium(III); Triphenylphosphine; OS donor ligand; Catalytic oxidation; NMO;

Reactions of benzophenone imine complex [Tp(NH═CPh2)(PPh3)Ru–Cl] with alkyne and dimerization of terminal alkynes in the presence of Et3N by Han-Gung Chen; Yih-Hsing Lo; Feng-Ling Wu; Han-Ying Wang; Li-Sheng Hsu; Pei-I Hsiao; Yao-Ren Liang; Ting-Shen Kuo; Chiung-Cheng Huang (956-958).
Treatment of benzophenone imine complex [Tp(PPh3)(NH═CPh2)Ru–Cl] (1) {Tp═HB(pz)3, pz = pyrazolyl} with 4-Ethynyltoluene in the presence of H2O in distilled ethanol afforded the chelate alkenyl ketone complex [Tp(PPh3)RuCCH2(p-MeC6H4)═CHC(O)(p-MeC6H4)] (2). On the other hand, reaction of 1 with HC≡C(O)OR1 in R2OH produced the chelate vinyl ether complexes [Tp(PPh3)Ru–C(OR2)═CHC(O)OR1] (3a, R1  = Me, R2  = Me; 3b, R1  = Et, R2  = Me; 3c, R1  = Et, R2  = Et; 3d, R1  = Me, R2  = Et), respectively. Preliminary results on the catalytic activity of 1 are also presented. Intriguingly, complex 1 is found to catalyze the dimerization of terminal alkynes HC≡CR (R =  p-MeC6H4, C(O)OCH3) in the presence of Et3N to give eynes. The structures of 3c and 3d have been determined by X-ray diffraction analysis.Display Omitted
Keywords: Benzophenone imine; Alkenyl ketone; Chelate vinyl ether; Dimerization of terminal alkynes;

Novel interpenetrating and non-interpenetrating structures based on semi-rigid 4,4′-biphenyl-based ligand by Yushan Chang; Hong Xu; Shaopei Xie; Jinpeng Li; Xuling Xue; Hongwei Hou (959-963).
Display Omitted
Keywords: Biphenyl; Crystal structure; DRS UV/Vis; Second-order NLO effects;

Ligand substitution in sandwich-type complexes of germanotungstates: Syntheses, crystal structures and magnetic properties by Yuchao Wang; Lin Xu; Ning Jiang; Xizheng Liu; Fengyan Li; Yungao Li (964-967).
Two new sandwich-type germanotungstates K2H2{Zn(en)2}{Zn(en)2}2{(GeW9O34)2Zn4(Hen)2}·17H2O (1) and K2H2{Ni(en)2}{Ni(en)2}2{(GeW9O34)2Ni4(Hen)2}·12H2O (2) (en = ethylenediamine) have been hydrothermally synthesized. The polyanions of the two compounds are composed of a [Ge2W18M4(Hen)2O68]10 (M = Zn, Ni) group decorated by two [M(en)2(H2O)]2+ units. The luminescence of compound 1 exhibits an intense UV radiation emission maximum at λ  ≈ 449 nm upon excitation of 372 nm. The magnetic investigation of compound 2 demonstrates the presence of ferromagnetic interactions between the Ni2+ ions of the Ni4O14(Hen)2 clusters in 2.Two new sandwich-type germanotungstates K2H2{Zn(C2N2H8)2}{Zn(C2N2H8)2}2{(GeW9O34)2Zn4(C2N2H9)2}·17H2O (1) and K2H2{Ni(C2N2H8)2}{Ni(C2N2H8)2}2{(GeW9O34)2Ni4(C2N2H9)2}·12H2O (2) (en = ethylenediamine) have been hydrothermally synthesized. The polyanions of the two compounds are composed of a [Ge2W18M4(Hen)2O68]10 (M = Zn, Ni) group decorated by two [M(en)2(H2O)]2+ units. The luminescence of compound 1 exhibits an intense UV radiation emission maximum at λ  ≈ 449 nm upon excitation of 372 nm. The magnetic investigation of compound 2 demonstrates the presence of ferromagnetic interactions between the Ni2+ ions of the Ni4O14(Hen)2 clusters in 2.Display Omitted
Keywords: Germanotungstates; Sandwich-type; Synthesize; Luminescence; Magnetism;

A novel dinuclear indium complex (1) containing a sole water bridge was prepared from the reaction of InCl3 with an unsymmetric N2O2-ligand and the molecular structure of the complex 1 was determined. The X-ray crystallography data show that the dinuclear complex possesses two homochiral N atoms, namely, N(R)N(R) and N(S)N(S) enantiomers. Complex 1 was used as initiator for ring-opening polymerization of rac-lactide, giving heterotactic-rich polylactide (P r  = 0.63–0.69) with narrow polydispersities (1.13–1.31).An enantiomeric water-bridged dinuclear indium complex (1) containing two homochiral N atoms was prepared and structurally characterized. The racemate of 1 is catalytically active for the ring-opening polymerization of rac-LA, giving heterotactic-rich polylactide with narrow polydispersities.Display Omitted
Keywords: Indium; Ring-opening polymerization; Unsymmetric N2O2 ligand; Water bridge;

Three new polyoxometalate-based hybrids prepared from choline chloride/urea deep eutectic mixture at room temperature by Shi-Ming Wang; Wei-Lin Chen; En-Bo Wang; Yang-Guang Li; Xiao-Jia Feng; Lin Liu (972-975).
Three new polyoxometalate-based hybrids {[(CH3)3N(CH2)2OH]2(H3O)}[Na2(H2O)6][IMo6O24]·H2O 1 , {Na2[(CH3)3N(CH2)2OH]4}[Al(OH)6Mo6O18]2·8NH2CONH2·4H2O 2 and {Na6(H2O)18[(CH3)3N(CH2)2OH]2(CON2H5)2}[NaMo7O24]2·4NH2CONH2·H2O 3 were successfully synthesized in the choline chloride/urea deep eutectic mixture at room temperature. Reactant quantities of water presents in the nonaqueous eutectic mixture solvent may influence the structure of the products. The three compounds are fully characterized by elemental analyses, IR, UV–vis, TG analyses, power X-ray diffraction and single-crystal X-ray diffraction. The photocatalytic properties of 1 and 2 are investigated.Three new polyoxometalate-based hybrids have been synthesized in choline chloride/urea eutectic mixture at room temperature. Reactant quantities of water influence the final structure of the products.Display Omitted
Keywords: Deep eutectic mixture; Polyoxometalate; Green routine; Ambient temperature; Ionic liquid;

The reaction of 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole (3-bpt) with copper sulfate in EtOH/H2O solvent yields four coordination polymers [Cu(3-bpt)(H2O)4](SO4)·H2O (1), [Cu(3-bpt)(H2O)4][Cu(3-bpt)(H2O)3(SO4)](SO4)·7H2O (2), [Cu(3-bpt)(H2O)3(SO4)]·2H2O (3) and [Cu(3-bpt)(H2O)(SO4)] (4), showing one-dimensional undulated chain, zigzag chain and two-dimensional network. The formations of compounds 1, 2 and 3 are controlled by the EtOH/H2O ratio. The synthesis of compound 4 may be controlled by the EtOH/H2O ratio and the temperature because it is prepared under solvothermal condition. The thermal properties have been investigated.Display OmittedFour coordination polymers from one-dimensional undulated chain, zigzag chain, to two-dimensional network were synthesized. The formations of compounds 1, 2 and 3 are controlled by the EtOH/H2O ratio. The synthesis of compound 4 may be controlled by the EtOH/H2O ratio and the temperature because it is prepared under solvothermal condition.
Keywords: Copper sulfate complex; Solvent-controlled assembly; Coordination polymer; 4-amino-3,5-bis(3-pyridyl)-1,2,4-triazole;

Two inorganic–organic hybrid compounds based on [Ni2(V3O9)2]2− cluster and {Co2V2} cage subunits by Lianjiang Su; Hongying Zang; Hongsheng Liu; Limin Wang; Weihong Li; Zhongmin Su (981-984).
Two novel inorganic-organic hybrid compounds (Ni3(Hfcz)4(V3O9)2∙ 2H2O) (1) and Co5(H2O)4(fcz)2(V4O12)2 (2) have been successfully constructed, based on [Ni2(V3O9)2]2− “bow tie” clusters and {Co2V2} pure inorganic cages. Structural analysis reveals that the clusters and cages are expanded to a 2D network and 3D framework via NiII and CoII, respectively. In addition, we investigated the optical band gaps of the two compounds: 2.92 eV and 2.23 eV.Display Omitted
Keywords: Oxovanadate-based compounds; Inorganic cage; NiII complex; CoII complex; Fluconazole;

A new 3D coordination polymer [Ni2(L)2(bpp)2(μ 2-H2O)] (1) (H2L = 2,4-dibenzoylisophthalic acid and bpp = 1,3-bis(4-pyridyl)propane) has been synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectra, and thermogravimetric analysis. Further, it was determined by single crystal X-ray diffraction analysis. Compound 1 is a 3D network with (36·48·57) topology, which comprises of two kinds of helical chains. Additionally, compound 1 shows ferromagnetic interactions among metal ions.A new 3D coordination polymer [Ni2(L)2(bpp)2(μ 2-H2O)] (1) (H2L = 2,4-dibenzoylisophthalic acid and bpp = 1,3-bis(4-pyridyl)propane) has been synthesized under hydrothermal conditions. Complex 1 is a 3D network with (36·48·57) topology, in which comprises of two kinds of helical chains. Additionally, complex 1 shows ferromagnetic interactions among metal ions.Display Omitted
Keywords: Nickel compound; Carboxylate ligand; Crystal structure; Helical chain; Ferromagnetic;

N-{2-(Arylseleno/telluro)ethyl}morpholine (L1/L2) synthesized by reacting PhSe/ArTe (generated insitu) with (2-chloroethyl)morpholine hydrochloride, reacts with RhCl3·3H2O resulting in complexes [RhCl2(L1/L2)4][ClO4] (1/2). 1H, 13C{1H} and 77Se{1H}/125Te{1H} NMR spectra of L1, L2, 1 and 2 were found characteristic. The single crystal structure of 2 has been solved. The L2 binds with Rh in 2 as a monodentate ligand. The geometry around Rh is distorted octahedral. The Rh–Te distances are in the range 2.6509(9)–2.6688(8) Ǻ. Both the complexes efficiently catalyze transfer hydrogenation reaction of acetophenone (TON/TOF up to 9.9 × 104/9.9 × 103  h− 1) and benzophenone (TON up to 9.8 × 104 and TOF up to 9.8 × 103  h− 1).N-{2-(arylseleno/telluro)ethyl}morpholine (L1/L2) and complexes [Rh(III)Cl2(L1/L2)4][ClO4] (1/2) have been synthesized and characterized with 1H, 13C{1H} and 77Se{1H}/125Te{1H} NMR spectra. The 2 has trans structure and octahedral geometry around Rh. constituted by four Te and two Cl. The 1 and 2 show good catalytic activity for transfer hydrogenation reaction of acetophenone and benzophenone (TON/TOF ≤ 9.9 × 104/9.9 × 103  h− 1).Display Omitted
Keywords: Selenium; Tellurium; Rhodium(III); Crystal structure; Catalytic transfer hydrogenation; Ketone;

The 1:1 interaction of the diastereopure Schiff bases (1S,2S)-bis(acetylacetone)-cyclohexanediimine (L 1 ) and (1R,2R)-bis(acetylacetone)cyclohexanediimine (L 2 ) with CdI2 yields the new helical metal coordination polymers [CdL 1 I2] n (1) and [CdL 2 I2] n (2). The respective X-ray structures, as expected, confirmed 1 and 2 to be enantiomeric, existing as right-handed (P) and left-handed (M) helical chains in which both L 1 and L 2 are formally present in their (unusual) uncharged ketoamine form, with the (protonated) amine nitrogens not coordinated. The Cd(II) centres in 1 and 2 display distorted tetrahedral coordination geometries being bound to two iodo ligands and two oxygen donor atoms from individual ketoamine domains belonging to different Schiff base ligands.Display Omitted
Keywords: Cadmium(II); Diastereopure; Helical; Schiff base; X-ray;

Synthesis, crystal structures and urease inhibitory activity of copper(II) complexes with Schiff bases by Zhong-Lu You; Lin Zhang; Da-Hua Shi; Xiao-Ling Wang; Xiao-Fang Li; Yu-Ping Ma (996-998).
Two thiocyanate-coordinated Schiff base copper(II) complexes, [CuL1(NCS)] (1) and [Cu2(L1)21,3-NCS)2] n (2), where L1 and L2 are the deprotonated forms of 4-bromo-2-[(2-propylaminoethylimino)methyl]phenol (HL1) and 2-ethoxy-6-[(2-propylaminoethylimino)methyl]phenol (HL2), respectively, have been prepared and structurally characterized. Single crystal X-ray diffraction indicates that 1 is a mononuclear copper(II) complex, while in 2, the adjacent two complex molecules are linked through two phenolate O atoms, forming a dimer. The dimers in 2 are further weakly linked through end-to-end thiocyanate bridges to form a two-dimensional sheet. The Cu atom in 1 is four-coordinate in a square planar geometry, and that in 2 is six-coordinate in an octahedral geometry. Complex 1 shows strong urease inhibitory activity, while complex 2 shows no activity.Two thiocyanate-coordinated Schiff base copper(II) complexes have been prepared and structurally characterized. The crystal structures and urease inhibitory activities of the complexes were investigated.Display Omitted
Keywords: Synthesis; Crystal structure; Copper complex; Urease inhibition;

A supramolecular optic sensor for selective recognition AMP by Xue-Fang Shang; Hongyan Su; Hai Lin; Hua-Kuan Lin (999-1003).
Cu-coordinated complex based on 7-membered amide cycle has been designed and synthesized. And its binding ability with nucleotides (AMP, adenosine 5′-monophosphate; ADP, adenosine 5′-diphosphate; ATP, adenosine 5′-triphosphate) has been studied by UV–vis spectrum. Results indicate that the receptor shows the highest binding ability with AMP among studied nucleotides and can selectively and strongly bind nucleotides at neutral medium. The receptor can be used as optical sensor for the detection of AMP.Synthesis route for receptor 1.Display Omitted
Keywords: 7-membered amide cycle; AMP; Neutral medium;