title: Cationic gold carbonyl complex on a phosphine support.
abstract: A cationic gold carbonyl complex has been synthesized and characterized using several techniques including X-ray crystallography. [(Mes(3)P)Au(CO)][SbF(6)] (Mes = 2,4,6-Me(3)C(6)H(2)) has a linear, two-coordinate gold atom. This compound displays the CO stretching frequency at 2185 cm(-1). The (13)C NMR signal of the gold-bound (13)CO appears as a doublet centered at δ 182.6 ((2)J(C,P) = 115 Hz). A computational study shows that the Au-CO bond consists of electrostatic attraction, Au ← CO donation, and significant Au → CO π-back-bonding components. Polarization of the CO bond caused by the electrostatic effect of the cationic gold center is mainly responsible for the large blue shift in the CO stretching frequency.
authors.affiliation: Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019-0065, USA. dias@uta.edu
authors.forename: H V Rasika
authors.initials: HV
authors.lastname: Dias
authors.forename: Chandrakanta
authors.initials: C
authors.lastname: Dash
authors.forename: Muhammed
authors.initials: M
authors.lastname: Yousufuddin
authors.forename: Mehmet Ali
authors.initials: MA
authors.lastname: Celik
authors.forename: Gernot
authors.initials: G
authors.lastname: Frenking