High performance liquid chromatography of alkyl-chained diphosphines and group 6 and 7 binary carbonyls

Abstract

This paper reports on the reversed phase high performance liquid chromatography (HPLC) of Group 6 carbonyl complexes [M(CO)6 where M = Cr, Mo, W] and their Group 7 homonuclear [M2(CO)10 (M = Mn, Re)] and heteronuclear [MnRe(CO)10] counterparts together with PPh3 and its analogous alkyl-chained diphosphine ligands [Ph2P(CH2)(n)PPh2 where Ph = C6H5, n = 1 to 6]. Complete separations are achieved among the congeneric carbonyls and homologous phosphines on a reversed phase C18 column, using acetonitrile and water as the mobile phase. Separation between the Mn-Re bonded decacarbonyl from its parent, Mn2 and Re2 carbonyls, is also attained. The elution pattern is governed by the molecular size and mass and influenced by the nature of the central metal.