Gold(I)-carbenes derived from 4-pyridylisocyanide complexes: supramolecular macrocycles supported by hydrogen bonds, and luminescent behavior.
Monomeric gold(I) carbenes of the type [AuR[C(NR1R2)(NHPy-4)]] (Py-4 = 4-pyridyl) have been prepared with R = C6F5, Fmes (2,4,6-tris(trifluoromethyl)phenyl) by reaction of the corresponding isocyanide compounds [AuR(CNPy-4)] with primary or secondary amines. The single crystal X-ray diffraction structures of [Au(C6F5)[C(NEt2)(NHPy-4)]].OH2, [Au(Fmes)[C(NEt2)(NHPy-4)]], and [Au(Fmes)[C(NHMe)(NHPy-4)]] show that the presence of the NHPy-4 moiety formed induces the formation of supramolecular macrocycles only supported by hydrogen bond interactions, either with N-H groups of other molecules (tetrameric macrocycles), or with water molecules (dimeric macrocycles). Dimeric gold(I) carbenes were also produced using a diamine to form a bridging carbene, or using octafluorobiphenyl to form a Au-C6F4-C6F4-Au bridge, but the solid state structures of these dimers could not be solved. Most of the complexes herein described display luminescent properties.
Bartolomé
Camino
C
IU CINQUIMA/Quinmica Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071, Valladolid, Castilla y León, Spain.
Carrasco-Rando
Marta
M
Coco
Silverio
S
Cordovilla
Carlos
C
Espinet
Pablo
P
Martín-Alvarez
Jose M
JM