Existence of 2-carboxyphenyldiphenylarsine oxide as a novel resonance hybrid structure with strong intermolecular hydrogen bonding dissociating to the first example of a monocyclic acyloxyhydroxyarsorane in chloroform

Abstract

The solid state spectral and X-ray structural investigation of the title arsine oxide shows it to exist as a novel resonance structure (1e) having a short hydrogen bond; i.r. (CHCl₃) and ¹H n.m.r. (CDCl₃) data for dilute solutions indicate the 1-hydroxy-1,1-diphenyl-2,1λ⁵-benzoxarsol-3-one structure (1d), providing the first example of a stable monocyclic acyloxyhydroxyarsorane.