title: Luminescent goldI carbenes from 2-pyridylisocyanide complexes: structural consequences of intramolecular versus intermolecular hydrogen-bonding interactions.
abstract: Isocyanide [AuX(CNPy-2)] (X = Cl, C6F5, fluoromesityl, 1/2 octafluorobiphenyl) and carbene [AuX{C(NR1R2)(NHPy-2)}] (R1R2NH = primary or secondary amines or 1/2 primary diamine) gold(I) complexes have been synthesized and characterized. For X = Cl, the carbene complexes show aurophilic interactions. The fragment NHPy-2, formed in the carbenes, can give rise to intra- (for primary amines) or intermolecular (for secondary amines) hydrogen bonds, depending on the amine used. These bonds and contacts have been studied in the solid state and in solution. The intermolecular hydrogen bonds are split in an acetone solution, but the intramolecular ones, which close a six-membered ring, survive in solution. Except for the fluoromesityl derivatives, the carbene complexes display luminescent properties.
authors.affiliation: IU CINQUIMA/Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, E-47071 Valladolid, Spain.
authors.forename: Camino
authors.initials: C
authors.lastname: Bartolomé
authors.forename: Marta
authors.initials: M
authors.lastname: Carrasco-Rando
authors.forename: Silverio
authors.initials: S
authors.lastname: Coco
authors.forename: Carlos
authors.initials: C
authors.lastname: Cordovilla
authors.forename: Jose M
authors.initials: JM
authors.lastname: Martín-Alvarez
authors.forename: Pablo
authors.initials: P
authors.lastname: Espinet