作者:Max Preisenberger、Andreas Bauer、Annette Schier、Hubert Schmidbaur
DOI:10.1039/a706033e
日期:——
In an attempt to carry out polyauration of dithiophosphinate units, diphenyldithiophosphinic acid, Ph2P(S)SH, was treated with the reagents [(R′3P)Au]3O}+BF4– to give compounds Ph2P[SAu(PR′3)]2}+BF4– with R′ = Ph, Me or o-tolyl (o-Tol) (1–3). The symmetrical Au· · ·Au bonded structure of complex 1 was confirmed by a single-crystal X-ray diffraction study. Intercationic contacts are found only between gold and sulfur atoms. The analogous reaction with PhP(S)(SSiMe3)2 gave an unstable product of the composition PhP[SAu(PPh3)]3}+BF4–4, for which a solution structure with mirror-symmetry is proposed on the basis of low-temperature NMR data. Attempts to polyaurate dimethyldithiophosphinic acid led to cleavage of the P–S bonds with formation of known trigold sulfonium salts. (Phosphine)gold(I) dithiophosphinates Me2P(S)SAu(PR′3) were obtained from Me2P(S)SNa and chloro(phosphine)gold complexes (R′ = Me, Ph or o-Tol, 5–7 respectively). The crystal and molecular structure of compound 5 was determined. In the crystal, the compound forms two crystallographically independent, centrosymmetrical dimers with Au· · ·Au contacts [3.1152(5) and 3.1466(5) Å] between ‘crossed’ monomers. With (Me2S)AuCl as a precursor, the product of the reaction with Me2P(S)SNa was [Me2P(S)SAu]28. Compound 8 is a dinuclear complex with an elongated eight-membered ring structure in a chair conformation. The crystal-structure analysis reveals the expected transannular Au· · ·Au contacts [3.1949(9) Å], but no intermolecular contacts are discernible.
为了尝试对二硫代膦酸单元进行聚芳香化,二苯基二硫代膦酸 Ph2P(S)SH 与试剂 [(R′3P)Au]3O}+BF4- 进行了处理,得到了化合物 Ph2P[SAu(PR′3)]2}+BF4- ,其中 R′ = Ph、Me 或邻甲苯基 (o-Tol) (1-3)。单晶 X 射线衍射研究证实了复合物 1 的对称金-金键结构。仅在金原子和硫原子之间发现了互成接触。与 PhP(S)(SSiMe3)2 的类似反应产生了一种成分为 PhP[SAu(PPh3)]3}+BF4-4的不稳定产物,根据低温核磁共振数据提出了具有镜像对称性的溶液结构。对二甲基二硫代磷酸进行聚牛磺酸化的尝试导致了 P-S 键的裂解,并形成了已知的三金锍盐。(从 Me2P(S)SNa 和氯(膦)金络合物(R′= Me、Ph 或 o-Tol,5-7)中得到了(膦)金(I)二硫代磷酸盐 Me2P(S)SAu(PR′3)。化合物 5 的晶体和分子结构已经确定。在晶体中,该化合物形成两个晶体学上独立的、中心对称的二聚体,"交叉 "单体之间有 Au- - -Au 接触 [3.1152(5) Å 和 3.1466(5) Å]。以 (Me2S)AuCl 为前体,与 Me2P(S)SNa 反应的产物为 [Me2P(S)SAu]28。化合物 8 是一种双核复合物,具有椅状构象的拉长八元环结构。晶体结构分析显示了预期的跨annular Au- - Au 接触 [3.1949(9) Å],但没有发现分子间接触。