METAL COMPLEXES OF UNSATURATED TERTIARY PHOSPHINES AND ARSINES .7. CHELATE MONOOLEFIN COMPLEXES OF PLATINUM(2) AND PALLADIUM(2)

The ligands o-allylphenyldimethylarsine (AA), o-CH2=CHCH2C6H4As(CH3)2, and o-allylphenyldiphenylphosphine (AP), o-CH2=CHCH2C6H4P(C6H5)2, form chelate complexes of formula MX2(ligand) (M = Pt, Pd; X = Cl, Br), in which both the group V atom and the double bond are coordinated to the metal. The reactions of these compounds with iodide ion and with thiocyanate ion lead to a variety of compounds in which the double bond may or may not be coordinated to the metal. These studies, together with the infrared spectra of the complexes, suggest that metal-olefin bonding is stronger for platinum(II) than for palladium(II), in agreement with previous work. The phosphine AP forms chelate complexes more readily than does the arsine AA. © 1968, American Chemical Society. All rights reserved.