Abstract
Two cobalt(III) complexes [Co(L1)2]ClO4 (1) [HL 1= N-ethyl-2-((5-methyl-1H-pyrazol-3-yl)methylidene) hydrazinecarbothioamide] and [Co(L2)2]ClO 4.CH3OH.H2O (2) [HL2=N,N-dimethyl-2- ((5-methyl-1H-pyrazol-3-yl)methylidene) hydrazinecarbothioamide] and one nickel(II) complex [Ni(HL3)2](ClO4)2.2H 2O (3) [HL3=(2E)-N-ethyl-2-((6-methyl-2-(methylsulfanyl) pyrimidin-4-yl)methylidene)-hydrazinecarbothioamide] have been prepared and characterized by spectroscopic studies and X-ray diffraction measurements. Structural study reveals that the coordination environment around each metal center is distorted octahedral. The two tridentate (NNS) uninegative pyrazole derived ligands in the cobalt(III) complexes (1 and 2) and the two similar neutral pyrimidine derived ligands in the nickel(II) complex (3) are coordinated to the central metal ions in the meridional fashion. The pyrazole N and thiolato S in (1) and (2) and pyrimidine N and thione S in (3) are cis to each other while azomethine N atoms are trans coordinated.
Original language | English |
---|---|
Pages (from-to) | 1334-1342 |
Number of pages | 9 |
Journal | Indian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry |
Volume | 50 |
Issue number | 9-10 |
State | Published - Sep 2011 |
Keywords
- Cobalt
- Coordination chemistry
- Nickel
- Pyrazoles
- Pyrimidines
- Thiosemicarbazones
- X-ray structure