名称:
Synthesis and structural studies of RhI, PdI, NiII complexes and one-pot synthesis of binuclear RuII complex [(η6-p-cymene)Ru(μ2-Cl)3Ru{PhN(P(OC6H4OMe-o)2)2}Cl]
摘要:
The Rh-I, Ru-II, Pd-I and Ni-II complexes of the aminobis(phosphonite), PhN(P(OC6H4OMe-o)(2))(2) (1) are reported. The reactions of 1 with [Rh(COD)Cl](2) in 1:1 and 2:1 molar ratio afford the mono- and diolefin substituted chloro bridged chelate complexes, [(COD)Rh-2(mu(2)-Cl)(2){PhN(P(OC6H4OMe-o)(2))(2)}] (2) and [Rh(mu(2)-Cl){PhN(P(OC6H4OMe-o)(2))(2)}](2) (3), respectively. Similarly, the cationic mono- and bis-chelate complexes, [Rh(COD)(PhN(P(OC6H4OMe-o)(2))(2)}]OTf (4) and [Rh{PhN(P(OC6H4OMe-o)(2))(2)}(2)]OTf (5) are obtained by treating 1 with [Rh(COD)Cl](2) in the presence of AgOTf in appropriate ratios. The dinuclear Rh-I carbonyl complex, [RhCl(CO){mu-PhN(P(OC6H4OMe-o)(2))(2)}](2) (6) is prepared by treating 1 with 0.5 equiv. of [Rh(CO)(2)Cl](2). Reaction of 1 with cis-[NiBr2(DME)] (DME = 1,2-dimethoxyethane) affords [{PhN(P(OC6H4OMe-o)(2))(2)} NiBr2] (7) whereas with [Ru-(eta(6)-p-cymene)Cl-2](2) in refluxing THF medium produces an interesting and rare bimetallic Ru-II complex, [(eta(6)-p-cymene)Ru(mu(2)-Cl)(3)Ru{PhN(P(OC6H4OMe-o)(2))(2))Cl] (8). Redox condensation of the Pd-0 and Pd-II derivatives with 1 affords the dinuclear Pd-I complex, [PdBr{mu-PhN(P(OC6H4OMe-o)(2))(2)}](2) (9). The formation and structure of complexes 2-9 are assigned through various spectroscopic and micro analysis data. The molecular structures of 5 and 7-9 are confirmed by single crystal X-ray diffraction studies. (c) 2007 Elsevier B.V. All rights reserved.