LATE-TRANSITION-METAL MU-OXO AND MU-IMIDO COMPLEXES .6. GOLD(I) IMIDO COMPLEXES

The first group 11 imido complexes have been synthesized by two routes. Treating [(LAu)3O]BF4 (1) with excess RNH2 gives [(LAu)3NR]BF4 (2) and H2O (L = PPh3, R = tBu, Ph, p-FPh, p-BrPh, p-NO2Ph). Alternatively, treating [(LAu)3O]BF4 with excess RNCO gives 2 and CO2. A remarkable feature of the latter synthesis is the incorporation of 17O into remaining PhNCO when [(LAu)317O]BF4 is used. Crystals of 2 (R = Ph) from CH2Cl2/ether are monoclinic (C2/c) with a = 22.103 (4) Å, b = 21.577 (9) Å, c = 25.85 (1) Å, β = 113.11 (3)°, V = 11336.6 Å3, and Z = 8. The structure consists of well-separated cations and anions and half-occupancy CH2Cl2 of crystallization. The cationic portion shows three linear coordinate Au atoms with a μ3-phenylimido nitrogen with a distorted tetrahedral geometry. © 1990, American Chemical Society. All rights reserved.