FUNCTIONALIZED 1,1-ETHENE DITHIOLATES AS LIGANDS .2. NICKEL(II), PALLADIUM(II) AND PLATINUM(II) COMPLEXES OF SUBSTITUTED BETA-KETO DITHIO ACID DIANIONS

para-Substituted beta-ketodithiocinnamic acid dianions react with L2MC l2 [M = Ni, L = PBu3; M = Pd, L = PPh3; M = Pt, L = PEt3, PBu3, PPh2To l, 1/2 dppe, 1/2 2,9-dimethyl-1,10-phenanthroline (dmphen)] to give th e 1,1-ethene dithiolate complexes L2M[S2C = CH-C(O)-C6H4-p-OCnH2n-1] ( 3: M = Ni, L = PBu3, n = 12; 4 a, b: M = Pd, L = PPh3, n = 1, 8; 5 a: M = Pt, L = PEt3, n = 1; 5 b, 5 e-g; 5 i: M = Pt, L = PPh3, n = 1, 8, 10, 12, 14; 5 c, h: M = Pt, L = 1/2 ddpe, n = 1, 12; 5j: M = Pt, L = P Ph2Tol, n = 12; 6 a-c: M = Pt, L = 1/2 dmphen, n = 8, 12, 16); L2Pt[S2 C = CH-C(O)-C6H4-p-C12H25] (7 a, b: L = PPh3, 1/2 dmphen), (Ph3P)2Pt[S 2C = CH-C(O)-C6H4-p-C6H5] (8) and L2M[S2C = CH-C(O)-C4H3S] (9 a: M = P d, L = PPh3; 9 b: M = Pt, L = PEt3; 9 c: M = Pt, L = PPh3, 9 d: M = Pt , L = 1/2 dppe). These compounds have been characterized by their UV, IR, H-1, C-13 and P-31 NMR spectra.