Synthesis and characterization of side-bound aryldiazo and end-bound nitrosyl complexes of nickel

摘要

Structural characterization of a nickel aryldiazo complex supported by the bulky l,2-bis(di-tert-butylphosphino)ethane ligand reveals square-planar Ni geometry and an unusual side-on coordination mode for the N_2R moiety,while the related nitrosyl complex displays trigonal-planar geometry at Ni and end-on coordination of the NO ligand.Transition metal aryldiazo complexes have been of general interest since the first example was reported by Parshall in 1965.This interest has been motivated by the ligand's relevance to N_2-fixation intermediates,as well as by its varied structural and reactivity properties.