X-ray structural and spectroscopic investigation of cyanamidonitrate nickel(II) complexes with pyrazole type ligands

被引：0
|
作者：
Mária Hvastijová
Jiří Kohout
Jesús García Díaz
Jozef Kožíšek
Johann W. Buchler
机构：
[1] Slovak University of Technology,Department of Inorganic Chemistry
[2] Slovak University of Technology,Department of Physical Chemistry
[3] Darmstadt University of Technology,Department of Inorganic Chemistry
来源：
Transition Metal Chemistry | 2001年 / 26卷
关键词：
Nitrogen; Nickel; Molecular Structure; Nitrile; Electronic Spectrum;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
New cyanamidonitrate complexes of the type [Ni(NO2NCN)2L4], where L = pyrazole (pz), 3(5)-methylpyrazole (mpz), 3,5-dimethylpyrazole (dmpz), 3,4,5-trimethylpyrazole (tmpz), indazole (benzopyrazole; inz), 4-bromopyrazole (Br-pz) and 4-iodopyrazole (I-pz) have been isolated and characterized by i.r. and electronic spectroscopy. The crystal structure of [Ni(NO2NCN)2(pz)4] was solved by X-ray crystallography. The NiII environment is practically octahedral, composed of four tertiary nitrogens from pyrazole ligands and two nitrile nitrogens from cyanamidonitrate groups. According to the spectral results similar molecular structures can be attributed to all remaining complexes. The i.r. spectra exhibit changes in the cyanamidonitrate vibrations caused by coordination of this group. The electronic spectra are in agreement with the practically octahedral NiII environment.
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页码：430 / 434
页数：4
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