Komplexe von Halogenid‐Ionen mit 1‐Halogen‐2‐phenylacetylenen. Kristallstrukturen von PPh4[X(I—CC—Ph)4] mit X = Cl, Br, I, von PPh4[Br(Br—CC—Ph)4] und von NMe4[F(I—CC—Ph)2]

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Abstract
Complexes of Halide Ions with 1‐Halogen‐2‐phenylacetylenes. Crystal Structures of PPh4[X(I—CC—Ph)4] with X = Cl, Br, I, of PPh4[Br(Br—CC—Ph)4], and of NMe4[F(I—CC—Ph)2] Herrn Prof. Dr. H. Brunner zum 60. Geburtstag gewidmet. The complexes PPh4[X(I—CC—Ph)4] with X = Cl (1), Br (2), I (3), PPh4[Br(Br—CC—Ph)4] (4), and NMe4[F(I—CC—Ph)2] (5) were prepared from the corresponding salts PPh4X and NMe4F, respectively, with the 1‐halogen‐2‐phenylacetylenes X—CC—Ph (X = Br, I) in dichloromethane solutions. 1—5 form colourless crystals, which were characterized by vibrational spectroscopy. According to the crystal structure determinations the halide ions in 1—4 are coordinated by the halogen atoms of the 1‐halogen‐2‐phenylacetylenes in a tetragonal‐pyramidal fashion. The fluoride ion in 5 is only twofold coordinated with a bond angle I—F—I of 110.45°.

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