Inorganic Chemistry Communications (v.9, #3)

Contents List (iii-ix).

(O-Benzoylsalicylato)copper(II) complexes as synthetic enzyme-product models for flavonol 2,4-dioxygenase by József Kaizer; Szabina Góger; Gábor Speier; Marius Réglier; Michel Giorgi (251-254).
The molecular structure of [CuII(O-bs)(BPEA)], [CuII(O-bs)(BnBPA)]ClO4, and [CuII(O-bs)(Bn-6Me2BPA)]ClO4 [O-bsH =  O-benzoylsalicylic acid, BPEAH =  N,N-bis(2-pyridylmethyl)amino-2-ethanoic acid, BnBPA =  N-benzyl-N,N-bis(2-pyridylmethyl)amine, Bn-6Me2BPA =  N-benzyl-N,N-bis(6-methyl-2-pyridylmethyl)amine] was fully determined by IR, UV–Vis, and X-ray crystal analysis. The oxygenation of flavonol using the above-mentioned copper complexes as a catalyst results in the oxidative cleavage of the heterocyclic ring to give a O-benzoylsalicylic acid and CO as a mimic of quercetinase action.Mononuclear complexes of the type [CuII(BPEA)(O-bs)], [CuII(BnBPA)(O-bs)]ClO4, and [CuII(Bn-6Me2BPA)(O-bs)]ClO4 [O-bsH =  O-benzoylsalicylic acid, BPEAH =  N,N-bis(2-pyridylmethyl)amino-2-ethanoic acid, BnBPA =  N-benzyl-N,N-bis(2-pyridylmethyl)amine, Bn-6Me2BPA =  N-benzyl-N,N-bis(6-methyl-2-pyridylmethyl)amine] were synthesized as synthetic enzyme-depside complexes, and characterized by spectroscopic measurements and X-ray crystal analysis. The oxygenation of flavonol using the above-mentioned complexes as catalyst results in the oxidative cleavage of the heterocyclic ring to give a O-benzoylsalicylic acid and CO as a mimic of quercetinase action.
Keywords: Copper; Carboxylates; O-Benzoylsalicylic acid; Flavonol; Dioxygenation;

Formation and characterization of a benzoquinolate triplatinum cluster containing a μ3-PPh2 bridging system and two Pt–Pt bonds by Alvaro Díez; Juan Forniés; Ana García; Elena Lalinde; M. Teresa Moreno (255-258).
The trinuclear cluster [Pt3(bzq)(μ-PPh2)2(C6F5)3] 1 has been obtained by treatment of [Pt(bzq)(μ-PPh2)]2 with cis-[Pt(C6F5)2(thf)2] (1:2 molar ratio). The presence of a five-coordinate PPh2 bridging ligand [μ3-PPh(1,2-η2-Ph)-κ3 P] has been proved by X-ray diffraction analysis.The reaction between [Pt(bzq)(μ-PPh2)]2 and cis-[Pt(C6F5)2(thf)2] (1:2 molar ratio) results in the formation of a bent benzoquinolate triplatinum cluster [Pt3(bzq)(μ-PPh2)2(C6F5)3] 1, which has been characterized by X-ray crystallography. The structure shows the presence of μ2-PPh2 and [μ3-PPh(1,2-η2-Ph)-κ3 P] bridging ligands and two platinum–platinum bonds.
Keywords: Cluster compounds; Platinum; Bridging phosphido ligands; X-ray structure;

The functionalized oligosilane dendrimers of formula [Me(Me3Si)2Si][Me(Me3Si)2Si–Me2Si]2Si–SiMe2OH and [R(Me3Si)2Si–Me2Si]3Si–Cl (R = SiMe3, Me) have been synthesized and structurally characterized. The absorption maximum of the latter compounds was found to be significantly red shifted in comparison to their permethylated analogues.The unusual UV spectroscopic behavior of the chloro functionalized oligosilane dendrimers [R(Me3Si)2Si–Me2Si]3Si–Cl (3a,b) derived from reactions of R(Me3Si)2Si–K (2a,b) with Cl–Si(SiMe2Cl)3 (1) is reported (a; R = SiMe3 and b; R = Me). The dendritic silanol [Me(Me3Si)2Si][Me(Me3Si)2Si–Me2Si]2Si–SiMe2OH (6) has been isolated as a side product and was characterized by X-ray structure analysis.
Keywords: Silicon; Silanes; Dendrimers; Silanols; Clorosilanes;

Nanoscale microreactor containing “3,10-dialkyl-dibenzo-1,3,5,8,10,12-hexaazacyclotetradecane; [Ni(R2Bzo2[14]aneN6)]2+, R = H, Me, Et, Bu and benzyl”; were successfully have been prepared by the in situ one-pot template synthesis (IOPTS) of formaldehyde and 1,2-phenylenediamine (1,2-phen) with alkyl and benzyl amine within the nanodimensional pores of zeolite-Y. The new materials “[Ni(R2Bzo2[14]aneN6)]2+–NaY” were characterized by several techniques: chemical analysis and spectroscopic methods (FT-IR, UV/Vis, XRD, BET, DRS). The host–guest nanocomposite, catalyze the oxidation of cyclohexene with molecular oxygen.Nanoscale microreactor containing “3,10-dialkyl-dibenzo-1,3,5,8,10,12-hexaazacyclotetradecane, [Ni(R2Bzo2[14]aneN6)]2+, R = H, Me, Et, Bu and benzyl” was successfully prepared by the in situ one-pot template synthesis (IOPTS) of formaldehyde and 1,2-phenylenediamine (1,2-phen) with alkyl and benzyl amine within the nanodimensional pores of zeolite-Y. The new host–guest nanocomposite materials “[Ni(R2Bzo2[14]aneN6)]2+–NaY” were characterized by several techniques: chemical analysis and spectroscopic methods (FT-IR, UV/Vis, XRD, BET, DRS) and then were used for oxidation of cyclohexene with molecular oxygen.
Keywords: Nanocomposite; Nickel(II); 14-Membered; Hexaaza; Oxidation;

Metal ion promoted hydrolysis of nitrile-functionalized triazamacrocycle by Zhong Zhang; Ying He; Qun Zhao; Wei Xu; Yi-Zhi Li; Zhi-Lin Wang (269-272).
Hydrolysis of nitrile pendant arms attached to triazamacrocycle was first achieved in the presence of metal ion, and the ZnII complex containing the amide derivative ligand was characterized by X-ray crystallography, electrospray ionization mass spectrum (ESI-MS), IR and UV spectroscopy.The triazamacrocyclic ligand L functionalized with nitrile pendant arms undergoes metal-promoted hydrolysis in undried CH3CN to afford amide derivative L1 followed by the formation of a complex [ZnL1](ClO4)2 (1), which was structurally characterized. Furthermore, unexpected metal-assisted decyanomethylation reaction of the ligand L was observed via electrospray ionization mass spectrum (ESI-MS) when aqueous CH3CN was employed as the reaction solvent.
Keywords: Hydrolysis; Azamacrocycle; Nitrile pendant arm; ZnII complexes; Decyanomethylation;

Two novel coordination polymers with different N-donors, [Co(suc)(im)] n (1) and [Co(suc)(phen)] n (2) (suc = succinic dianion, im = imidazole, phen = 1,10-phenanthroline) were synthesized by solvothermal technique and structurally characterized by elemental analysis, IR and single crystal X-ray diffraction. Compound 1 exhibits a novel molecular tectonics like fourfold entangled catenane. Compound 2 shows a two-dimensional structure with two types of rings observed. They exhibit different photoluminescence properties.Two novel coordination polymers with different N-donors, [Co(suc)(im)] n (1) and [Co(suc)(phen)] n (2) (suc = succinic dianion, im = imidazole, phen = 1,10-phenanthroline) were synthesized by solvothermal technique and structurally characterized by elemental analysis, IR and single crystal X-ray diffraction. Compound 1 exhibits a novel molecular tectonics like fourfold entangled catenane. Compound 2 shows a two-dimensional structure with two types of rings observed. They exhibit different photoluminescence properties.
Keywords: Succinic anion; N-donor; Tectonics; Photoluminescence;

The First Pb–O= bond, A Novel 2D Coordination Polymer, [Pb(5-FUOAc)2] n , 5-FUOAc = 5-fluorouracil-1-acetate.A novel 2D polymeric PbII complex containing the first Pb–O= bond, [Pb(5-FUOAc)2] n (5-FUOAc = 5-fluorouracil-1-acetate), has been synthesized and characterized. The single-crystal X-ray data shows the coordination number in PbII ions is seven, PbO7, with “stereo-chemically active” electron lone pairs, and the coordination sphere is hemidirected.
Keywords: 5-Fluorouracil-1-acetate; Lead(II); 2D Coordination polymer; Lone pair;

Chemical modification of cytochrome c by a ruthenium complex containing phenanthroline quinone by Keiko Yokoyama; Takafumi Asakura; Nobuhumi Nakamura; Hiroyuki Ohno (281-283).
The chemical modification of proteins by the quinone moiety of a 1,10-phenanthroline-5,6-dione (pdon) complex was investigated using [Ru(pdon)(bpy)2](ClO4)2 (bpy = 2,2′-bipyridyl) ([1](ClO4)2) and cytochrome c (cyt. c) in solutions of pH 7–9. Mass spectra revealed a peak of cyt. c modified with 1. The reactivity of 1 for cyt. c increased with the pH of the solution.The chemical modification of proteins by the quinone moiety of a 1,10-phenanthroline-5,6-dione (pdon) complex was investigated using [Ru(pdon)(bpy)2](ClO4)2 (bpy = 2,2′-bipyridyl) ([1](ClO4)2) and cytochrome c (cyt. c) at various pH (7–9). Mass spectra revealed a peak of cyt. c modified with 1. The reactivity of 1 for cyt. c increased with the pH of the solution. These results suggest that 1 was successfully attached to cyt. c by a reaction between the quinone moiety of 1 and the amino group or guanidino group of cyt. c. In the reaction at pH 9, the ratio of cyt. c to 1 in the product was estimated to be 1:0.8 by UV–vis spectroscopy.
Keywords: Ru(II) complex; Phenanthroline quinone; Nucleophilic reaction; Cytochrome c;

DFT, TDDFT and ZINDO/S calculations of the electronic structure and spectra were carried out for the nitrosyl-aqua and di-aqua iron complexes with diimines as equatorial ligands. The electronic structure of the nitric oxide complex can be characterized as a low spin d 6 iron cation bonded to the NO moiety.DFT, TDDFT and ZINDO/S calculations were carried out for the nitrosyl-aqua (I) and di-aqua (II) iron complexes with diimines as equatorial ligands. The electronic structure of the nitric oxide complex can be characterized as a low spin d 6 iron cation bonded to the NO moiety.On the basis of TDDFT and ZINDO/S calculations, the two bands of divalent iron with nitric oxide, water and Me4[14]tetraeneN4 ligand (1) at about 600 and 400 nm are found to consist of d → d, d → π NO ∗ , π NO ∗ → d and d → π diimine ∗ transitions. In the case of di-aqua complex, the band at 575 nm is assigned as a d → π diimine ∗ transition.
Keywords: Nitric oxide; Iron; DFT; TDDFT; ZINDO;

A new biomimetic model of the active site of Fe-only hydrogenase [{(μ-SCH2)2N(2-C4H3O)}Fe2(CO)6] presents unusual electrochemical property with the reductive potential at −1.13 V versus Fc/Fc+ by HClO4.A new biomimetic model of the active site of Fe-only hydrogenase [{(μ-SCH2)2N(2-C4H3O)}Fe2(CO)6] (6) was synthesized and characterized by IR, 1H, 13C NMR spectroscopy. The butterfly based core structure was also confirmed by X-ray diffraction. The electrochemistry data indicated that the reductive potential at −1.13 V versus Fc/Fc+ by HClO4 is the lowest of that reported.
Keywords: Hydrogenases; Furan; Diiron azadithiolate; Proton reduction potential;

Templated synthesis of mesoporous titanium phosphates for the sequestration of radionuclides by X. Shari Li; Andrea R. Courtney; Wassana Yantasee; Shas V. Mattigod; Glen E. Fryxell (293-295).
Mesoporous titanium phosphate phases were prepared using non-ionic surfactants and easily handled titanium precursors; testing reveals that these materials have the ability to sequester certain radionuclides.Several mesoporous titanium phosphate phases, with varying pore sizes, were prepared using non-ionic surfactants and easily handled titanium precursors under mild reaction conditions. Preliminary testing reveals that these materials have high affinity for certain radionuclides of environmental concern.
Keywords: Mesoporous; Metal phosphate; Sorbent; Radionuclide; Synthesis;

Two novel oxo-bridged dinuclear neutral Mo(V) and Mo(VI) complexes have been prepared by reaction of Mo(III) and Mo(V) isothiocyanato compounds with tripod heteroscorpionate N,N,O-ligand (Hbdmpza) and subsequent oxidation by air oxygen. The preparation, IR-spectroscopic and structural characterization of the title compounds are reported.Mixtures of (picH)[Mo(NCS)4(pic)2]/Hbdmpza and (P(C6H5)4)2[MoO(NCS)5]/Hbdmpza or K3[Mo(NCS)6]/Hbdmpza (pic = 4-methylpyridine, Hbdmpza = bis(3,5-dimetylpyrazol-1-yl) acetic acid) were refluxed in acetonitrile. By air-oxidation of solutions, trans-[Mo2O5(bdmpza)2] (1) compound containing dinuclear Mo 2 O 5 2 + core, and trans-[Mo2O3(NCS)2(bdmpza)2] · 4CH3CN (2) complex containing dinuclear oxo-bridged Mo 2 O 3 4 + fragment, have been prepared and characterized by single-crystal X-ray crystallography.
Keywords: Scorpionate ligands; Hbdmpza; Molybdenum(V); Molybdenum(VI); Isothiocyanate; Crystal structure;

The novel ladder-like coordination polymer consisting of the linear trinuclear copper (II) subunits and featuring the mixed μ-hydroxo and μ-carboxylato bridges shows an antiferromagnetic behavior with a strong intra-trimer antiferromagnetic coupling and a weak inter-trimer antiferromagnetic coupling.Two one-dimensional cobalt (II) and copper (II) complexes, [Co(5-nbdc)2(imH)2] n (1) and [Cu3(5-nbdc)2(OH)2(imH)2] n (2) (5-nbdcH2  = 5-nitro-1,3-benzenedicarboxylic acid and imH = imidazole) have been synthesized and structurally characterised. Complex 2, a molecular ladder consisting of the linear trinuclear copper (II) subunits and featuring the mixed μ-hydroxo and μ-carboxylato bridges, indicated a strong intra-trimer antiferromagnetic coupling (J/k  = −43.8 K) and a weak inter-trimer antiferromagnetic coupling (J′/k  = −2.5 K) with the corresponding g value 2.011.
Keywords: Coordination polymer; Copper; Cobalt; Crystal structure;

Nanodimensional microreactor containing (3,10-dialkyl-dibenzo-1,3,5,8,10,12-hexaazacyclotetradecane)copper(II) complexes have been prepared by the one-pot template synthesis of formaldehyde and 1,2-phenylenediamine (1,2-phen) with alkyl and benzyl amine within the pores of zeolite-Y. The spectra of the neat and encapsulated complexes show that the four secondary nitrogen atoms are coordinated to the copper(II) ion. Encapsulated copper(II) complex is catalytically very efficient as compared to other neat complexes for the partial oxidation of benzyl alcohol with hydrogen peroxide as oxidant and is stable to be recycled without much deterioration.Nanodimensional microreactor containing (3,10-dialkyl-dibenzo-1,3,5,8,10,12-hexaazacyclotetradecane)copper(II) complexes have been prepared by the one-pot template synthesis of formaldehyde and 1,2-phenylenediamine (1,2-phen) with alkyl and benzyl amine within the pores of zeolite-Y. The copper(II) complexes were entrapped in the supercage of Y-zeolite by a two-step process in the liquid phase: (i) inclusion of a copper(II) precursor complex, [Cu(1,2-phen)2]2+-NaY, and (ii) template condensation of the copper(II) precursor complex with the formaldehyde and amine. The spectra of the neat and encapsulated complexes show that the four secondary nitrogen atoms are coordinated to the copper(II) ion. Encapsulated copper(II) complex is catalytically very efficient as compared to other neat complexes for the partial oxidation of benzyl alcohol with hydrogen peroxide as oxidant and is stable to be recycled without much deterioration.
Keywords: Nanocomposite; Copper(II); 14-Membered macrocycle; Hexaaza; Oxidation;

Intercalation of diiodine molecules in cis-Ru(bpy)2Cl2 by Samik Nag; Michael G.B. Drew; Dipankar Datta (310-312).
A packing diagram of cis-Ru(bpy)2Cl2  · 1.7I2 showing how the disordered I2 molecules fill in the gaps between the cis-Ru(bpy)2Cl2 molecules.Reaction of diiodine with cis-Ru(bpy)2Cl2 in methanol at room temperature yields a thermally stable intercalate cis-Ru(bpy)2Cl2  · 1.7I2 (1) which has been characterised by X-ray crystallography. Iodine is leeched from 1 as it reacts with acetone at room temperature.
Keywords: Ruthenium(II); Intercalation; Iodine; Crystal structure;

Derivatizable phthalocyanine with single carboxyl group: Synthesis and purification by Jincan Chen; Naisheng Chen; Jinling Huang; Jundong Wang; Mingdong Huang (313-315).
Unsymmetrical zinc phthalocyanine with only one carboxyl group on phthalocyanine ring was synthesized by statistical condensation, and purified by column chromatography, providing as a potential photosensitizer with an anchor point for attachment of biological targeting agents.Phthalocyanine zinc (ZnPc) is an important class of photosensitizers. Derivatization of phthalocyanine ring with chemical functional groups provides anchor points for covalent attachment of biological targeting agents, thus increasing the selectivity of the photosensitizers. ZnPc with symmetric and multiple functional groups, e.g., tetracarboxyphthalocyanine zinc, is easy to be prepared but is unfavorable for linking targeting agents due to many reasons. On the other hand, single-substituted ZnPc, is more challenging to synthesize and, especially, to purify. Here we report the synthesis of an unsymmetrical phthalocyanine, 2-carboxyphthalocyanine zinc 1, with a single carboxylic group on phthalocyanine ring, and the design of its chromatographic purification.
Keywords: Unsymmetrical phthalocyanine; Carboxyl phthalocyanine; Photodynamic therapy; Biological targeting agents;

The alexandrite-like Cr-doped aluminum oxalato complexes by Laongjit Chaiyapoom; Sumpun Wongnawa; Chaveng Pakawatchai; Jonathan Charmant; Saowanit Saithong (316-318).
Doping of aluminum oxalato complex with chromium resulted in three new crystalline products in two colors: one is blue and the other two are red. The two red crystals show the color-change behavior under fluorescence and incandescence lights similar to that observed in alexandrite gemstone.The Cr-doped aluminum oxalato complexes were obtained by substituting Al with trace of Cr. Three types of products were obtained in two colors: blue (one) and red (two). One of the red crystallizes in the hexagonal crystal system with space group R 3 ¯ . The two red complexes possess the color-change property under different light sources (fluorescence and incandescence lights) similar to alexandrite – the rare and expensive gemstone.
Keywords: Aluminum complexes; Oxalate ligand; Oxalato complexes; Bimetallic oxalato complexes; Alexandrite;

Deprotonation of rac-[2-(diphenylphosphino)ferrocenyl]acetonitrile (1) followed by reaction with electrophiles affords stereoselectively nitriles substituted at the α-carbon with respect to the nitrile group. The (S,R p/R,S p)-configuration of the preferred isomer was confirmed by single-crystal X-ray diffraction analysis for 2-[2-(diphenylphosphino)ferrocenyl]propionitrile.Deprotonation of racemic [2-(diphenylphosphino)ferrocenyl]acetonitrile (1) with NaN(SiMe3)2 in THF followed by reaction with electrophiles MeI and Ph2PCl affords the substituted nitriles, 2-[2-(diphenylphosphino)ferrocenyl]propionitrile (2a) and 2-(diphenylphosphino)-[2-(diphenylphosphino)ferrocenyl]acetonitrile (2b), respectively. Whereas the former reaction yields a 15:1 mixture of isomers differing in configuration at the alkylated α-carbon from which the major diastereoisomer can be isolated by simple recrystallization, the latter gives 2b as a single diastereoisomer. The dominating product of the methylation reaction was characterized by X-ray diffraction analysis as (S,R p/R,S p)-2a, which is in accordance with the possible access of the electrophile towards deprotonated 1.
Keywords: Ferrocene; Nitriles; Alkylation; Chiral donors; Structure elucidation;

Cobalt(II)-promoted hydrolysis of cephalexin: Crystal structure of the cephalosporoate–cobalt(II) complex by Zhen-Feng Chen; Yun-Zhi Tang; Hong Liang; Xin-Xian Zhong; Yan Li (322-325).
The cobalt(II) ion-promoted hydrolysis of cephalexin is confirmed by X-ray crystal structure of the cephalosporoate–cobalt(II) complex, which indicates that the double bond of dihydrothiazine ring in cephalosporoate undergoes a shift from position 3–4 to 4–5 and uptake of a proton at C(3) by the α face.The cobalt(II) ion-promoted hydrolysis of the widely used cephalosporin antibiotic cephalexin is confirmed by solid crystallographic characterization of the cephalosporoate–cobalt(II) complex [Co(cephalosporoate)2] · 6H2O (1), obtained from an aqueous solution containing Co(OAc)2 and cephalexin. The crystal structure analysis results prove that the double bond of dihydrothiazine ring in cephalosporoate undergoes a shift from position 3–4 to 4–5 in aqueous media at low pH, with the consequent uptake of a proton at C(3) by the α face.
Keywords: Cobalt; Crystal structure; Cephalexin; Hydrolysis;

Upon crystallographic study on complexes, [Ni(LI)2](Cl)2(H2O) (1) (LI  = diethylenetriamine) and [Ni(LII)](Cl)(H2O) (2) (LII  =  N-(2-(naphtholate)methine)diethylenetriamine) were found a full hydrogen-bonded 1-D network, which is uniquely anionic helical ( Cl ⋯ H 2 O ) n n - .X-ray crystal studies on Ni(II) complexes, [Ni(LI)2](Cl)2(H2O) (1) (LI  = diethylenetriamine) and [Ni(LII)](Cl)(H2O) (2) (LII  =  N-(2-(naphtholate)methine)diethylenetriamine) reveals a new type of hydrogen-bonded chains [ ⋯ Cl ⋯ H – O – H ] n n - , existing in both 1 and 2 as paired M and P helices with 2-fold screw axes parallel to b, and thermal analysis of 1 reveals that the water molecules in chains evaporate at 105 °C accompanied by an enthalpy change of 27.2 kJ mol−1.
Keywords: Nickel(II); Full hydrogen-involving bonds; Thermal analysis;

The bi-capping pseudo-Keggin type tungstovanadophosphate, [ Co 4 ( PO 4 ) 2 ( C 12 H 8 N 2 ) 8 ( H 2 O ) 2 ] [ PW 9 V V V 2 IV O 40 ( V IV O ) 3 ] · 2 H 2 O contains a novel bi-capping pseudo-Keggin type heteropolyanion [ PW 9 VI V 3 IV O 40 ( V IV O ) 2 ] 5 - and four-nuclei cation [Co4(HPO3)2(C12H8N2)8(H2O)2]4+. In this compound, the different heteropolyanions are linked by water molecules and the cations [Co4(HPO3)2(C12H8N2)8(H2O)2]4+ through very strong hydrogen bonds, to form a extensive three-dimensional supramolecular assembly.A novel polyoxometalate [ Co 4 ( HPO 3 ) 2 ( C 12 H 8 N 2 ) 8 ( H 2 O ) 2 ] ( H 3 O ) [ PW 9 VI V 3 IV O 40 ( V IV O ) 2 ] · H 2 O (1) has been synthesized under hydrothermal conditions. The X-ray crystallography shows that 1 contains a novel bi-capping pseudo-Keggin type heteropolyanion [ PW 9 VI V 3 IV O 40 ( V IV O ) 2 ] 5 - and a four-nuclei cation [Co4(HPO3)2(C12H8N2)8(H2O)2]4+. The different heteropolyanions are linked by water molecules and the cations [Co4(HPO3)2(C12H8N2)8(H2O)2]4+ through the hydrogen bonds, to form an extensive three-dimensional supramolecular assembly.
Keywords: Metal–oxygen cluster; Hydrothermal synthesis; Structure; Heteropolyanion; Single crystal;

Bis(macrocyclic)dicopper(II) complexes containing phenylene bridges between 13-membered triaza dioxa macrocyclic subunits have been synthesized via in situ one pot template condensation reaction (IOPTCR) of aromatic nitrogen–nitrogen linker, formaldehyde and (1,8-diamino-3,6-dioxaoctane)copper(II) in a 1:4:2 molar ratio. These complexes are found to be effective catalysts for oxidation of tetrahydrofuran with H2O2 as oxidant.Bis(macrocyclic)dicopper(II) complexes containing phenylene bridges between 13-membered triaza dioxa macrocyclic subunits have been synthesized via in situ one pot template condensation reaction (IOPTCR) of aromatic nitrogen–nitrogen linker, formaldehyde and (1,8-diamino-3,6-dioxaoctane)copper(II) in a 1:4:2 molar ratio. These complexes are found to be effective catalysts for oxidation of tetrahydrofuran with H2O2 as oxidant.
Keywords: Copper(II); Bis(macrocycle); 13-Membered; Triaza dioxa; Oxidation;

In this paper, a 2D distorted brick wall structure (63-nets) constructed from tetracopper(II) SBUs was reported. The relationship between its magnetic property and structure also has been investigated.A coordination polymer, [Cu2(2,2′,3,3′-odpa)(H2O)3] · (H2O) (2,2′,3,3′-odpa = 2,2′,3,3′-oxydiphthalic acid) (1), has been obtained. Single crystal X-ray diffraction analysis indicated that 1 has a 2D distorted brick wall structure (63-nets) constructed from tetracopper(II) SBUs. The relationship between its magnetic property and structure also has been investigated.
Keywords: Coordination polymer; Cluster; Crystal structure; Brick wall; Magnetic property;

Solvothermal reactions of AgNO3, NaN3 with acetonitrile and propionitrile in methanol yield two non-interpenetrated supramolecular networks, [Ag(Mtta)] n (1) and [Ag(Etta)] n (2) (Mtta = 5-methyl tetrazolate, Etta = 5-ethyl tetrazolate), respectively, involving ligand in situ formation by cycloaddition of nitriles and azides. Difference of steric hindrance from substituted groups in tetrazole leads to the diversity of topological networks: 1 possesses 2-D 3-connected (4.82)Ag(4.82)Mtta topological network, whereas complex 2 is a 3-D 3-connected (10,3)-a metal network.Solvothermal reactions of AgNO3, NaN3 with acetonitrile and propionitrile in methanol yield two non-interpenetrated supramolecular networks, [Ag(Mtta)] n (1) and [Ag(Etta)] n (2) (Mtta = 5-methyl tetrazolate, Etta = 5-ethyl tetrazolate), respectively, involving ligand in situ formation by cycloaddition of nitriles and azides. Difference of steric hindrance from substituted groups in tetrazole leads to the diversity of topological networks: 1 possesses 2-D 3-connected (4.82)Ag (4.82)Mtta topological network, whereas complex 2 is a 3-D 3-connected (10,3)-a metal network.
Keywords: Silver(I) tetrazolate; In situ synthesis; Topology; Coordination polymer;