1190631-05-0Relevant articles and documents
Cyclopalladated azido complexes containing C,N-donor (HC~N = 2-(2′-thienyl)pyridine, azobenzene, 3,3′-dimethyl azobenzene, N,N′-dimethylbenzylamine, 2-phenylpyridine) ligands: Reactivity towards organic unsaturated compounds and catalytic properties
Lee, Kyung-Eun,Jeon, Hyeong-Tak,Han, Sam-Yong,Ham, Jungyeob,Kim, Yong-Joo,Lee, Soon W.
, p. 6578 - 6592 (2010/02/16)
Cyclopalladated azido dimers having various C,N-donor ligands, [Pd(μ-N3)(C,N-Ln)]2 (L1H = 2-(2′-thienyl)pyridine; L2H = azobenzene; L3H = 3,3′-dimethylazobenzene; L4H = N,N′-dimethylbenzylamine; L5H = 2-phenylpyridine), underwent cleavage with tertiary (or chelating) phosphines to form the cyclopalladated [Pd(N3)(PR 3)(C,N-L)], the σ-bonded [Pd(N3)(PR 3)2(C-L)], or the dinuclear-cyclopalladated [PdN 3(PR3)(C,N-L)]2(μ-P~P) complexes. In particular, treating [Pd(μ-N3)(C,N-L)]2 with the basic chelating phosphine (depe or dmpe) produced the homoleptic bis(chelating) complex [Pd(C,N-Ln)2] (n = 1-3). Complex [Pd(N 3)(PR3)(C,N-L4)] or [Pd(N3)(PR 3)2(C-L4)] reacted with aryl isocyanides to selectively give the imidoyl [Pd(N3)(-CN-Ar)(PR3)(N-L 4)] or the imidoyl carbodiimido complex [Pd(NCN-Ar)(-CN-Ar)(PR 3)(N-L4)], which was formed by the CN-Ar insertion into the orthometallated Pd-C bond on the phenyl moiety or the interaction into the Pd-N3 bond of the supporting ligand. In addition, reactions of [Pd(N3)(PR3)2(C-Ln)] (n = 1, 2, 4) with R-NCS {R = i-Pr, C6H4-NCS, (CH3) 3Si} gave the S-coordinated tetrazole-thiolato Pd(ii) complexes. Finally, the catalytic activity of the cyclopalladated azido complexes was evaluated. The Royal Society of Chemistry 2009.