Metal Complexes of Functionalized Sulfur‐Containing Ligands, VI[1]. – Stabilization of 1‐Alkyne‐1‐thiolato Ligands [R–C≡C–S–; R = SiMe3, (η5‐C5H4)Fe(η5‐C5H5)] in Ru(II) und Pt(II) Complexes. X‐ray Structure Analysis of cis‐(Ph3‐P)2Pt[C≡C–(η5‐C5H5)]2 The 1‐alkyne‐1‐thiolates R–C≡C–SLi [1: R = SiMe3, 3: (η5‐C5H4)Fe(η5‐C5H5)] react with (Ph3P)2PtCl2 and CpRu(PPh3)2Cl to give the complexes trans‐(Ph3P)2Pt(S–C≡C–SiMe3)2 (4a), CpRu(PPh3)2(S–C≡C‐SiMe3) (4b), and cis‐(Ph3P)2Pt[S–C≡C–η5‐C5H4)Fe(η5‐C5H5)]2 (5). The Pt(II) bis(acetylide) complex cis‐(Ph3P)2Pt[C≡C–(η5‐C5H4)Fe(η5‐C5H5)]2 (6a) was isolated after chromatography of 5. The trans‐configurated compound 6b is obtained by the reaction of [LiC≡C–(η5‐C5H4)]Fe(η5‐C5H5) with (Ph3P)2PtCl2. The complexes are characterized by IR, 1H‐, 13C‐, and 31P‐NMR spectroscopy, FAB mass spectrometry and X‐ray diffraction (6a).
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Weigand et al. (1993) studied this question.
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