Methyl Propiolate Cluster Complex (Ph4P)2[W6I8(C≡C–C(O)OCH3)6]

Resumo

A new organometallic iodide cluster complex (Bu₄N)₂[W₆I₈(C≡C–C(O)OCH₃)₆] (I), analogous to the previously described (Bu₄N)₂[Mo₆I₈(C≡C–C(O)OCH₃)₆], was obtained by the reaction of (Bu₄N)₂[W₆I₁₄] with silver methyl propiolate AgC≡C–C(O)OCH₃. The crystal structure was established for the tetraphenylphosphonium salt (Ph₄P)₂[W₆I₈(C≡C–C(O)OCH₃)₆] (II). According to X-ray diffraction (CIF file CCDC no. 1829205), tungsten atoms in II are coordinated by terminal carbon atoms of methyl propiolate ligands at W–C distances of 2.220(12)–2.268(14) Å. The methyl propiolate complexes were characterized by electrospray mass spectrometry, ¹H and ¹³C NMR spectroscopy, elemental analysis, and IR spectroscopy.