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Two cobalt complexes [NaCo II (nta)(H 2 O)] n (H 3 nta  =  nitrilotriacetic acid) (1) and NH 4 [Co III (ida) 2 ]  ·  2H 2 O (H 2 ida  =  iminodiacetic acid) (2) have been synthesized and characterized by single-crystal X-ray diffraction analysis. Compound 1 crystallizes in the orthorhombic system, space group P 2 1 2 1 2 1 with a   =  7.9770(12)  Å, b   =  9.7613(15)  Å, c   =  12.1945(18)  Å, V   =  949.5(2)  Å 3 , Z   =  4, and R 1   =  0.0705 for 1597 observed reflections. Compound 2 crystallizes in the monoclinic system, space group P 2(1)/ c with a   =  5.1801(3)  Å, b   =  11.2073(6)  Å, c   =  12.2891(7)  Å, V   =  707.09(7)  Å 3 , Z   =  2, and R 1   =  0.0349 for 1143 observed reflections. In compound 1, the Co is coordinated by a nitrogen and five oxygen atoms in a distorted octahedral geometry {CoNO 5 }, and the Na is coordinated by one water molecule and four carboxyl oxygen atoms in slightly distorted square pyramidal geometry. The entire structure shows a three-dimensional network. In compound 2, Co atom is equatorially coordinated by two ida ligands in a distorted octahedral geometry {CoN 2 O 4 }. The discrete [Co(ida) 2 ] 2- anions are linked by hydrogen bonding to a three-dimensional supramolecular network. [ABSTRACT FROM AUTHOR]

A Cu(II) complex with mixed ligands, [Cu 3 (mal) 3 (phen) 3 (H 2 O) 2 ]  ·  11H 2 O (mal  =  malonate, phen  =  1,10-phenanthroline) was synthesized and characterized by elemental analysis, IR, UV, electron paramagnetic resonance (EPR) and luminescence spectra and single-crystal X-ray diffraction. The complex crystallizes in the monoclinic system, space group Cc with a   =  13.1631(10)  Å, b   =  20.1089(10)  Å, c   =  20.1267(13)  Å, β  =  103.500(3)°, V   =  5180.2(6)  Å 3 , Z   =  4, and R 1   =  0.0476 for 7993 observed reflections. In the complex, one Cu is coordinated by a mal dianion and a phen molecule, exhibiting N 2 O 2 square-planar geometry, while the other two Cu atoms are coordinated, respectively, by a mal dianion, a phen and water molecules, exhibiting N 2 O 3 square pyramidal coordination geometry. [ABSTRACT FROM AUTHOR]

An unusual compound, K2[Mo4O13(NH3CH2COO)2] · 2H2O (1), has been synthesized and structurally characterized by the XRD, elemental analysis, IR spectrum, TG analyses and the single crystal X-ray diffraction. The structure of 1 exhibits a zigzag chain based on corner-shared tetramolybdate chelated by two bidentate glycine ligands. [ABSTRACT FROM AUTHOR]

A new Ni(II) coordination polymer with 2,4’-biphenyl-dicar- boxylate acid (H2bpdc) and 1,4-bis(4-pyridylmethy) piperazine (bpp) has been prepared by hydrothermal synthesis and characterized by single-crystal X-ray diffraction, IR, and EA. Complex [Ni(bpdc)2(bpp)1.5(H2O)]n(1), is triclinic system space groupP–1witha= 11.975(2) Å,b= 12.449(3) Å,c= 13.154(3) Å, α = 101.971(5)°,β= 111.961(4)°,γ= 91.211(3)°,V= 1768.6(12) Å3,Z= 2,Mr= 716.75,Dc= 1.345g/cm3,F(000) = 750, andμ= 0.60 cm–1. The final refinement gaveR= 0.0594 andwR= 0.1587 for 6185 reflections withI> 2σ(I). X-ray diffraction analysis reveals that the title complex [Ni(bpdc)2(bpp)1.5(H2O)]n(1) displays a three-fold diamond topological net. Furthermore, the luminescent property of complex 1 is investigated. [ABSTRACT FROM AUTHOR]