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Distorted Copper(II) Complex with Unusually Short CF···Cu Distances
Claire C Cody1, H Ray Kelly1, Brandon Q Mercado2
1Department of Chemistry, and Yale Energy Sciences Institute, Yale University, New Haven, Connecticut 06520-8107, United States.
Abstract:
We find a Cu(II)-(L-CF)2 complex (L-CF = 2,2,2-trifluoro-N-[2-(pyridin-2-yl)propan-2-yl]acetamide) with a distorted "seesaw" geometry. It has the shortest crystallographic CF···Cu distances yet reported, to the best of our knowledge (<2.6 Å), for which computational and experimental data indicate a secondary bonding interaction. A comparison with a CCl3 version and one without ligand backbone gem-dimethyl groups suggests a steric origin for the distorted geometry, resulting from the specific ligand interactions.
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