Synthesis and Structural Studies of (h3-allyl)carbonylnitrosyl Triphenylphosphine Iron Complexes

Abstract

In this paper we report the preparation of two (h3-allyl)carbonylnitrosyltriphenylphosphine iron complexes i.e.(p-allyl)carbonylnitrosyltriphenylphosphine iron (1) and (2-methyl-p-allyl) carbonylnit rosyltriphenylphosphine iron (2). These complexes (1) and (2) were prepared by reacting (p-allyl)dicarbonylnitrosyl iron and (2-methyl-p-allyl)dicarbonylnitrosyl iron with triphenylphosphine under inert atmospheric conditions. Both the resulting complexes were sufficiently and well characterized by IR, 1H NMR, 13C NMR, ESI/MS, HRMS and single crystal XRD. Triphenylphosphine ligand was found to be strong sigma donor and replaced carbonyl ligand readily. XRD revealed that the geometry of iron in both complexes is distorted octahedral.