921599-99-7Relevant academic research and scientific papers
Mitigating repulsions in close quarters: Copper tells us how!
Ahuja, Ritu,Nethaji,Samuelson
, p. 142 - 148 (2007)
Four copper(I) complexes of short bite ligands, bis(diphenylphosphino)amine (dppa) and bis(diphenylphosphino)isopropylamine (dppipa) were synthesized from appropriate precursors. All complexes were characterized by single crystal X-ray crystallography and spectroscopic techniques. In each of these complexes, two filled shell cations are forced into close proximity (≈2.7-2.8 ?). With no strong π acid ligands to siphon electron density from the filled d shell, the unavoidable repulsive d10-d10 interaction is mitigated when an unsymmetrical coordination environment around the copper atoms exists. The coordinatively saturated copper ion functions as a donor to the coordinatively unsaturated copper. A Cambridge Structural Database (CSD) search reveals the greater propensity of clusters with short contacts to adopt unsymmetrical coordination.
