Structural studies of nickel(II) complexes with 1-<Emphasis Type="Italic">tert</Emphasis>-butylimidazole-2-thione and 3-phenyl-5-methyl-pyrazole ligands |
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| Authors: | U P Singh V Aggarwal |
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| Institution: | (1) Department of Chemistry and Biochemistry, The University of South Carolina, Columbia, South Carolina 29208, USA;(2) School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China; |
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| Abstract: | The nickel(II) complexes dichlorobis(1-tert-butylimidazole-2-thione)nickel(II) Ni(tm t-Bu)2Cl2] (1), dinitratobis(1-tert-butylimidazole-2-thione)nickel(II) Ni(tm t-Bu)2(NO3)2] (2), dichloro-bis(3-phenyl-5-methyl-pyrazole)(1-tert-butylimidazole-2-thione)nickel(II) Ni(pzPh,MeH)2(tm t-Bu)Cl2] (3) and dinitratobis(3-phenyl-5-methyl-pyrazole)(1-tert-butylimidazole-2-thione)nickel(II) Ni(pzPh,MeH)2(tm t-Bu)(NO3)2] (4) have been synthesized and studied. The single crystal X-ray diffraction analysis was carried out for 1 and 4 {Bruker Kappa Apex-II CCD diffractometer, MoK α radiation}. Crystal data for 1: monoclinic C2/c, a = 16.949(2) Å, b = 8.6647(10) Å, c = 15.461(3) Å, β = 117.662(4)°, V = 2011.1(5) Å3, Z = 4, D calc = 1.460 g/cm3. Crystal data for 4: triclinic P-1, a = 9.9775(7) Å, b = 11.2254(8) Å, c = 14.8068(10) Å, α = 75.401(4)°, β = 87.422(4)°, γ = 74.874(4)°, V = 1548.86(19) Å3, Z = 2, D calc = 1.405 g/cm3. Coordination core of complex 1 adopts distorted tetrahedral geometry whereas core 4 has distorted octahedral geometry. The bonded nitrates are of two types coordinating as monodentate and bidentate ligands. |
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