Synthesis and spectroscopic characterization of nickel(II) complexes with 5-methyl-3-formylpyrazole-N(4)methylthiosemicarbazone (HL4Me):: X-ray crystallographic studies of [Ni(HL4Me)2](NO3)•22H2O

被引：0
|
作者：
Barik, AK
Paul, S
Kar, SK
Butcher, RJ
Bryan, JC
机构：
[1] Univ Coll Sci, Dept Chem, Kolkata 700009, W Bengal, India
[2] Howard Univ, Dept Chem, Washington, DC 20059 USA
[3] Oak Ridge Natl Lab, Div Chem & Analyt Sci, Oak Ridge, TN 37831 USA
来源：
POLYHEDRON | 1999年 / 18卷 / 3-4期
关键词：
Ni(II) complexes; methylformyl pyrazole methylthiosemicarbazone; X-ray structure; spectroscopic studies;
D O I：
暂无
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The coordination mode of the title ligand, HL4Me (synthesized and characterized by mass, IR and H-1 NMR spectral parameters) is reported by solid-state isolation and physicochemical identification of a few bis complexes of nickel(II) with different counterions. Magnetic and electronic spectral features classify the reported species, [Ni(HL4Me)(2)]X-2 . 2H(2)O, as six-coordinate, pseudo-octahedral with appreciable tetragonal distortion. Vibrational spectral data have indicated a neutral tridentate (NNS) function of HL4Me through the pyrazolyl (tertiary) ring nitrogen, azomethine nitrogen and thiocarbonyl sulphur. X-ray crystallographic studies of [Ni(HL4Me)(2)](NO3)(2) . 2H(2)O (triclinic, P (1) over bar) has unambiguously proved the distorted octahedral environment of the nickel(II) ion; the ligand molecules are trans coordinated to the central nickel(II) ion. (C) 1998 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：571 / 576
页数：6
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