Molecular tricorns: Self-assembly of trinuclear palladium(II) complexes

被引:54
作者
Carina, RF
Williams, AF
Bernardinelli, G
机构
[1] Univ Geneva, Dept Inorgan Analyt & Appl Chem, CH-1211 Geneva 4, Switzerland
[2] Univ Geneva, Lab Xray Crystallog, CH-1211 Geneva, Switzerland
关键词
D O I
10.1021/ic0009526
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Cyclometalation of the ligand 1,3-bis(1-alkylbenzimidazol-2-yl)benzene (1) with palladium carboxylates leads to a trimeric complex [Pd-3(ligand)(3)(carboxylate)(3)] (3). Studies in solution show that the trinuclear core is stable but that the carboxylates are labile, undergoing intra- and intermolecular exchange on an NMR time scale. The structural analogue of 1, 2,6-bis(1-alkylbenzimidazol-2-yl)pyridine (4), gives only the mononuclear species [Pd(4)(carboxylate)(2)], characterized by X-ray diffraction. This complex forms a trimer if one carboxylate is labilized by the addition of strong acid; the resulting trinuclear species is readily cleaved by nucleophiles but can include weakly basic anions within its cavity.
引用
收藏
页码:1826 / 1832
页数:7
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