Crystal structure of a homoleptic zinc(II) complex based on bis(3,5-diisopropylpyrazol-1-yl)acetate

• Main Authors: Josiah G. Elsberg, Nicholas G. Spiropulos, Adam C. Colson, Eric C. Brown
• Format: Article
• Language: English
• Published: International Union of Crystallography 2018-09-01
• Series: Acta Crystallographica Section E: Crystallographic Communications
• Subjects: crystal structure; zinc; heteroscorpionate ligands
• Online Access: http://scripts.iucr.org/cgi-bin/paper?S2056989018011246

Deprotonation of the methylene group in bis(3,5-diisopropylpyrazol-1-yl)methane with nBuLi and reaction with carbon dioxide yields lithium bis(3,5-diisopropylpyrazol-1-yl)acetate (1). Treatment of 1 with ZnCl2 results in the compound bis[bis(3,5-diisopropylpyrazol-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-diisopropylpyrazol-1-yl)acetate (bdippza) ligands. Each ligand facially coordinates the zinc center via κ3N,N′,O coordination modes to form a distorted octahedral complex with four pyrazole N atoms in the basal plane and two carboxylate O atoms in the axial sites.