PROPIOLATE CLUSTER COMPLEXES (Bu<inf>4</inf>N)<inf>2</inf>[Mo<inf>6</inf> X <inf>8</inf>(OOC–C≡CH)<inf>6</inf>] (X = Br, I)

Abstract: Two new cluster complexes (Bu4N)2[Mo6X8(OOC–C≡CH)6] (1) (X = Br) and (2) (X = I) are synthesized by the reaction of (Bu4N)2[Mo6X8(OOCCH3)6] (X = Br, I) with HOOC–C≡CH propiolic acid, their crystal structures are determined, and the luminescent properties are studied for powder samples at different temperatures. According to X-ray crystallographic data, molybdenum atoms are monodentately coordinated by oxygen atoms of the carboxyl group at Mo–O distances of 2.108(2)-2.121(16) Å. The propiolate complexes are characterized by electrospray mass spectrometry, 1Н and 13С NMR, elemental analysis, and IR spectroscopy. [Figure not available: see fulltext.