Triphenyl-phosphine and -arsine analogues which facilitate the electrospray mass spectrometric analysis of neutral metal complexes
作者:Corry Decker、William Henderson、Brian K. Nicholson
DOI:10.1039/a906010c
日期:——
The six triarylphosphines PPhn(C6H4OMe-p)3–n and PPhn(C6H4NMe2-p)3–n(n = 0–3) and the arsine As(C6H4OMe-p)3 (L) have been synthesized and examined for their use in the electrospray mass spectrometric (ESMS) study of metal complexes. This has been tested with selected examples of the complexes [Mo(CO)4L2], [Fe(CO)3L2], [Fe(CO)4L], [Ru3(CO)9L3], cis-[PtCl2L2], [PdCl2L2] and [AuCl(L)]. All of the metal carbonyl complexes of these ligands gave [M + H]+ ions in their spectra, while in contrast the analogous PPh3 complexes do not, suggesting that these electrospray-friendly ligands should be useful for the characterisation of a wide range of complexes by ESMS. The incorporation of the ligands into metal halide complexes however does not allow the observation of [M + H]+ ions, with ions formed by the previously reported halide-loss mechanism being the only ones observed.
已经合成了六种三芳基膦 PPhn(C6H4OMe-p)3–n 和 PPhn(C6H4NMe2-p)3–n(n = 0–3)以及胂 As(C6H4OMe-p)3 (L),并对其在电喷雾质谱(ESMS)研究金属配合物中的应用进行了考察。通过选择的配合物实例进行了测试,包括 [Mo(CO)4L2]、[Fe(CO)3L2]、[Fe(CO)4L]、[Ru3(CO)9L3]、顺式-[PtCl2L2]、[PdCl2L2] 和 [AuCl(L)]。所有这些配体的金属羰基配合物在其谱图中都生成了 [M + H]+ 离子,而相比之下,类似的 PPh3 配合物则没有,这表明这些对电喷雾友好的配体应有助于通过 ESMS 表征广泛的配合物。然而,将这些配体结合到金属卤化物配合物中并不能观察到 [M + H]+ 离子,仅能观察到之前报道的卤素损失机制形成的离子。