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• W1985996040 endingPage "8360" @default.
• W1985996040 startingPage "8348" @default.
• W1985996040 abstract "A series of nickel(II) and palladium(II) aryl complexes substituted in the ortho position of the aromatic ring by a (pinacolato)boronic ester group, [MBr[o-C(6)H(4)B(pin)]L(2)] (M = Ni, L(2) = 2PPh(3) (2a), 2PCy(3) (2b), 2PEt(3) (2c), dcpe (2d), dppe (2e), and dppb (2f); M = Pd, L(2) = 2PPh(3) (3a), 2PCy(3) (3b), and dcpe (3d)), has been prepared. Many of these complexes react readily with KO(t)Bu to form the corresponding benzyne complexes [M(eta(2)-C(6)H(4))L(2)] (M = Ni, L(2) = 2PPh(3) (4a), 2PCy(3) (4b), 2PEt(3) (4c), dcpe (4d); M = Pd, L(2) = 2PCy(3) (5b)). This reaction can be regarded as an intramolecular version of a Suzuki cross-coupling reaction, the driving force for which may be the steric interaction between the boronic ester group and the phosphine ligands present in the precursors 2 and 3. Complex 3d also reacts with KO(t)Bu, but in this case disproportionation of the initially formed eta(2)-C(6)H(4) complex (5d) leads to a 1:1 mixture of a novel dinuclear palladium(I) complex, [(dcpe)Pd(mu(2)-C(6)H(4))Pd(dcpe)] (6), and a 2,2'-biphenyldiyl complex, [Pd(2,2'-C(6)H(4)C(6)H(4))(dcpe)] (7d). Complexes 2a, 3b, 3d, 4b, 5b, 6, and 7d have been structurally characterized by X-ray diffraction; complex 5b is the first example of an isolated benzyne-palladium(0) species." @default.
• W1985996040 created "2016-06-24" @default.
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• W1985996040 date "2002-06-20" @default.
• W1985996040 modified "2023-09-23" @default.
• W1985996040 title "Preparation of Benzyne Complexes of Group 10 Metals by Intramolecular Suzuki Coupling of <i>o</i><i>rtho</i>-Metalated Phenylboronic Esters: Molecular Structure of the First Benzyne-Palladium(0) Complex" @default.
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• W1985996040 doi "https://doi.org/10.1021/ja0264091" @default.
• W1985996040 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/12105916" @default.
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