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Crystal structure of a homoleptic zinc(II) complex based on bis-(3,5-diiso-propyl-pyrazol-1-yl)acetate
Josiah G Elsberg1, Nicholas G Spiropulos1, Adam C Colson1
1Department of Chemistry and Biochemistry, Boise State University, 1910 University Drive, Boise, ID 83725, USA.
Abstract:
Deprotonation of the methyl-ene group in bis-(3,5-diiso-propyl-pyrazol-1-yl)methane with nBuLi and reaction with carbon dioxide yields lithium bis-(3,5-diiso-propyl-pyrazol-1-yl)acetate (1). Treatment of 1 with ZnCl2 results in the com-pound bis-[bis-(3,5-diiso-propyl-pyrazol-1-yl)acetato]-zinc(II), [Zn(C20H31N4O2)2] (2), whose structure has monoclinic (P21/c) symmetry. The ZnII ion resides on an inversion center and is coordinated by two bis-(3,5-diiso-propyl-pyrazol-1-yl)acetate (bdippza) ligands. Each ligand facially coordinates the zinc center via κ3N,N',O coordination modes to form a distorted octa-hedral complex with four pyrazole N atoms in the basal plane and two carboxyl-ate O atoms in the axial sites.
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