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A Gold(I)-Acetylene Complex Synthesised using Single-Crystal Reactivity.

Chloe L Johnson, Daniel J Storm, Muhammad Arif Sajjad, Matthew R Gyton, Simon B Duckett, Stuart A Macgregor, Andrew S Weller, Miquel Navarro, Jesus Campos
Angewandte Chemie 2024 May 4
Using single-crystal to single-crystal solid/gas reactivity the gold(I) acetylene complex [Au(L1)(η2-HC≡CH)][BArF4] is cleanly synthesized by addition of acetylene gas to single crystals of [Au(L1)(CO)][BArF4] [L1 = tris-2-(4,4'-di-tert-butylbiphenyl)phosphine, ArF = 3,5-(CF3)2C6H3]. This simplest gold-alkyne complex has been characterized by single crystal X-ray diffraction, solution and solid-state NMR spectroscopy and periodic DFT. Bonding of HC≡CH with [Au(L1)]+ comprises both σ-donation and π-backdonation with additional dispersion interactions within the cavity-shaped phosphine.

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