ChemInform Abstract: TRIPHENYLGOLDZINC

Organogold chemistry: I structure and synthesis

“…These effects operate for all heavy atoms, but just happen to have a maximum at gold. Other electron-deficient gold(I) compounds are best exemplified by AU2Zn2Ph6, for which structure XI has been proposed (34 …”

Gold η2-Coordination to Unsaturated and Aromatic Hydrocarbons: The Key Step in Gold-Catalyzed Organic Transformations

“…[22][23][24][25][26][27][28][29][30][31] In early work, the complexes were identified mainly by elemental analysis, vibrational spectroscopy, and cryoscopic or osmometric molecular mass determinations. 29 A few complementary experiments were carried out in several laboratories, 32 including those of G. Wittig 33 and G. J. M. van der Kerk, 34 focusing on complexes with 1,5-cyclooctadiene, cyclooctyne, and styrene, respectively, but this work obviously was soon discontinued. The group of J. K. Kochi turned to coordination compounds of gold(I) salts with poorly coordinating anions and applied NMR spectroscopy to their systems.…”

“…54 In the IR spectrum of this first structurally well-defined complex the ν(CdC) stretching vibration is observed at 1525 cm -1 , well below the 1648 cm -1 reported for the free olefin, 41 a feature common to the vibrational spectra of all olefin complexes of gold(I) already noted by Chalk, H€ uttel, and others in most of the earlier work. [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36] Conversely, the absence of a similar shift in the ν(CdC) absorption to smaller wavenumbers in organogold compounds with "dangling" vinyl or allyl groups (as in Ph 3 PAuC 6 H 4 -2-CHd CH 2 or Ph 3 PAuC 6 H 4 -2-CH 2 CHdCH 2 with ν(CdC) 1615 and 1638 cm -1 , respectively) was taken as a proof for the absence of any (olefin)gold coordination. 55 The new structural results 53 have been important benchmark data for subsequent theoretical investigations of (olefin)AuX complexes.…”