Three new coordination complexes of cobalt(III), manganese(II), and copper(II) with N,N,O-donor hydrazone ligands: syntheses and structural characterizations

被引:34
作者
Shit, Shyamapada [1 ]
Chakraborty, Joy [1 ]
Samanta, Brajagopal [1 ]
Slawin, Alexandra M. Z. [2 ]
Gramlich, Volker [3 ]
Mitra, Samiran [1 ]
机构
[1] Jadavpur Univ, Dept Chem, Kolkata 700032, W Bengal, India
[2] Univ St Andrews, Sch Chem, Mol Struct Lab, St Andrews KY16 9ST, Fife, Scotland
[3] Eidgenoss Tech Hsch Zurich, Lab Kristallog ETH, CH-9092 Zurich, Switzerland
关键词
Co(III); Mn(II); Cu(II); N; O-donor hydrazones; Crystal structures; Characterization; CRYSTAL-STRUCTURES; BRIDGED DINUCLEAR; CU(II) COMPLEXES; NICKEL(II); SERIES;
D O I
10.1007/s11224-009-9455-7
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Three new coordination complexes, 2{[Co(L-1)(2)]ClO4} center dot A 0.5CH(3)OH (1), [Mn(L-2)(2)] (2), and [Cu(HL2)(L-2)]ClO4 center dot A 2H(2)O (3) have been synthesized from two tridentate N,N,O-donor hydrazone ligands HL1, 2-acetylpyridine-salicyloylhydrazone, and HL2, 2-benzoylpyridine-salicyloylhydrazone, respectively and thoroughly characterized by elemental analysis, FT-IR, UV-Vis, electrochemical, and room temperature magnetic susceptibility measurements. Structures of the complexes have been unequivocally established by single crystal X-ray diffraction technique. Structural analysis reveals that 1 consists of two chemically similar but crystallographically independent cationic [Co(L-1)(2)](+) units and 2 consists of a neutral [Mn(L-2)(2)] molecule while 3 consists of a cationic [Cu(HL2)(L-2)](+) unit. Metal ions display distorted octahedral geometry in 1 and 2 while in 3 it shows a distorted square pyramidal geometry. Ligand conformations around the metal ions are stabilized by the presence of intra-ligand hydrogen bonding in all the complexes. Structure of 3 reveals that a perchlorate ion linked to the complex by hydrogen bonding via a water molecule.
引用
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页码:633 / 642
页数:10
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