Bao-kang Jin
2013
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Journal
Chinese Journal of Inorganic Chemistry
Abstract
The new monomeric complexes of [M(MPA)2(H2O)2](1: M=Co;2: M=Ni)(HMPA=5-methyl-1H-pyrazole-3carboxylic acid) were synthesized by the reaction of 5-methyl-1H-pyrazole-3-carboxylic acid with CoCl2·6H2O and Ni(NO3)2·6H2O,respectively.The compounds were characterized by elemental analysis,IR spectra,single crystal Xray diffraction.The structural parameters of 1 and 2 were analyzed as follows: 1,Hexagonal,R3c,a=1.48394(4) nm,b =1.483 94(4) nm,c =3.207 66(6) nm,V =6.1172(3) nm3,Z =18;2,Hexagonal,R3c,a =1.466 53(14) nm,b = 1.466 53(14) nm,c=3.243 0(6) nm,V=6.040 3(14) nm3,Z=18.Metal ions have all octahedral geometry coordinated by two nitrogen atoms and two oxygen atoms from two MPA-ligands,two oxygen atoms from two H2O molecules.In both complexes,the independent components [M(MPA)2(H2O)2] are connected by intermolecular hydrogen bonds to form a three-dimensional architecture with hexagonal channels.Thermogravimetric analyses show that 1 and 2 have higher thermal stability.In addition,the luminescent properties and electrochemical properties of complexes 1 and 2 have also been investigated.CCDC: 900677,1;900678,2.