摘要:
Two series of new dinuclear cyclometallated palladium complexes [{Pd(mu-NCO)(C<^>N)}(2)] containing asymmetric imidato NCO- bridging units have been synthesized [C <^> N = azobenzene (azb); -NCO- = succinimide (1a), phthalimide (2a) or maleimide (3a); C <^> N = 2-phenylpyridine (phpy); -NCO- = succinimide (1b), phthalimide (2b) or maleimide (3b)]. The reaction of both succinimidato precursors with tertiary phosphines to form the mononuclear N-bonded imidato derivatives of general Formula [Pd(C <^> N)(suc)(L)] [C <^> N = azb; L - PPh3 (4a), PPh2Me (5a), PPhMe2 (6a), P(4-F-C6H4)(3). (7a), P(4-MeO-C6H4)(3) (8a) C <^> N = phpy L = PPh3 (4b), PPh2Me (5b), PPhMe2 (6b), P(4-F-C6H4)(3) (7b), P(4-MeO-C6H4)(3) (8b)] has been investigated. The new complexes were characterized by partial elemental analyses and spectroscopic methods (IR, FAB, H-1, C-13 and P-31). The single-crystal structures of 1b and 4a have been established. (C) 2002 Elsevier Science Ltd. All rights reserved.