285547-30-0Relevant articles and documents
Metal-heterocyclic thione interactions. 12. Heterocyclic 2-thiolates of platinum(II) and palladium(II): The crystal structures of first examples of cis- [M(η1-S-pyridine-2-thiolato)2(L-L)] {M = Pt, Pd, L-L = 1,2-bis(diphenylphosphino)ethane; M = Pt, L-L = 1,2-bis(diphenylphosphino)ethene} complexes
Lobana, Tarlok S,Verma, Renu,Hundal, Geeta,Castineiras, Alfonso
, p. 899 - 906 (2008/10/08)
A series of platinum(II) complexes of stoichiometry cis-[Pt(η1-S-C5H4NS)2(L-L)] were obtained from the reactions of platinum tetra-chloride with pyridine-2-thione (C5H5NS) in the presence of Et3N base in an ethanol-benzene mixture followed by the addition of bis(tertiary phosphines), viz. {Ph2P-X-PPh2}, or phosphine chalcogenides {Ph2P-CH2-P(E)Ph2} {X(L-L) = (CH2)2(dppe) (1), CH=CH(dppen) (2), (CH2)3(dppp) (3), (CH2)4(dppb) (4), E = S, dppmPS (5), E = Se, dppmPSe (6)}. Palladium(II) complexes, viz. [Pd(η1-S-C5H4NS)2(L-L)] {L-L = dppm (X = CH2) (7), dppe (8), dppp (9), dppmPS (10), dppmPSe (11)}, were prepared by reacting [PdCl2(diphosphines)] suspended in ethanol with C5H5NS in the presence of aqueous NaOH. All these compounds have been characterised with the help of analytical data [IR, far-IR, NMR (1H, 13C, 31P) spectroscopy] and X-ray crystallography (for compounds 1, 2 and 8). The geometry about each metal centre is distorted square planar with trans bond angles of: compound 1, P-Pt-S, 170.31 (11), 173.18(10)°; compound 2, P-Pt-S, 168.97(5), 171.43(5)°; compound 8, P-Pd-S, 170.78(8), 171.83(8)°. The bite angles P(1)-M-P(2) and angles trans to bite angles, S(1)-M-S(2), are, respectively: compound 1, 85.68(11), 82.69(11)°; compound 2, 86.65(5), 84.01(6)°; compound 8, 85.19(8), 83.90(7)°. The dppe complexes (1 and 8) are isomorphous, monoclinic with space group C2/c, whereas the dppen complex is triclinic. These compounds represent the first examples of an interesting series of cis-platinum(II) and -palladium(II) derivatives of pyridine-2-thione containing chelating diphosphines and pendant pyridyl groups. (C) 2000 Elsevier Science Ltd.
