Preparation of a cyclic trimer with a Ni3P3 core: aggregation and conformation driven by steric demand

Abstract

Reaction of the secondary phosphine tridentate Schiff’s base ligand o-C₆H₄(OH)(CHN{CH₂}₂PHPh) with nickel chloride results in double deprotonation of the ligand and formation of a highly unusual trimeric structure; the cyclic Ni₃P₃ core adopts a distorted boat conformation in which phosphide donors bridge between the metal centres in preference to phenolate.