Structure and Photochemical Isomerization of the Dinuclear Gold(I) Halide Bis(diphenylphosphanyl)ethylene Complexes: Correlation Between Quantum Yield and Aurophilicity
作者:Janet B. Foley、Stanley E. Gay、Michael J. Vela、Bruce M. Foxman、Alice E. Bruce、Mitchell R. M. Bruce
DOI:10.1002/ejic.200700575
日期:2007.11
trans-(Ph2PCH=CHPPh2)(AuI)2 shows intermolecular Au–Au distances of 3.2292(7) A. Structural data for the iodide complexes are compared to previously reported crystal structural data for cis- and trans-(Ph2PCH=CHPPh2)(AuCl)2 and dppbz(AuCl)2. The quantum yields for the photochemical isomerization of cis-(Ph2PCH=CHPPh2)(AuX)2 with 334-nm light, Φ(cis trans), are 0.204, 0.269, and 0.363 for X = Cl, Br, and
报告了顺式-(Ph2PCH=CHPPh2)(AuI)2 和反式-(Ph2PCH=CHPPh2)(AuI)2 的晶体结构。cis-(Ph2PCH=CHPPh2)(AuI)2 的结构显示分子内 Au-Au 距离很短,为 2.9526(5) A,而反式-(Ph2PCH=CHPPh2)(AuI)2 的结构显示分子间 Au-Au 距离3.2292(7) A. 将碘化物复合物的结构数据与先前报道的顺式和反式 (Ph2PCH=CHPPh2)(AuCl)2 和 dppbz(AuCl)2 的晶体结构数据进行比较。顺式-(Ph2PCH=CHPPh2)(AuX)2 在 334 nm 光下光化学异构化的量子产率,Φ(cis trans),对于 X = Cl、Br 和 I,分别为 0.204、0.269 和 0.363。对模型 cis- 和 trans-Au2X2C2H2(PH2)2 配合物从头计算的先前结果有助于解释异构化的量子产率与计算的嗜热吸引势