TY - JOUR
T1 - 2-(Diphenylphosphino)-pyridine as an ambidentate ligand in homo- and hetero-binuclear complexes of copper, silver, and gold
AU - Olmos, M. Elena
AU - Schier, Annette
AU - Schmidbaur, Hubert
PY - 1997/2
Y1 - 1997/2
N2 - The reaction of 2-diphenylphosphino-pyridine (1) with AgBF4 in an equimolar ratio affords the cyclic, dinuclear complex 2 with mixed P,N-coordination of the metal atoms. With two equivalents of 1 the 2:1 complexes 4a,b are formed which have the metal atoms solely P-coordinated. The previously reported gold complex (3), an analogue of 2, or [Au(tht)2]ClO4 (tht = tetrahydrothiophen) also give the 2:1 complexes (5a,b) when treated with an excess of ligand 1. Addition of AgClO4 to a solution of 5a in acetone, or treatment of 4a with [Au(tht)2]ClO4 in dichloromethane, give the same mixed-metal complex 6, where the Au atoms are exclusively P-coordinated, while the Ag atoms are coordinated by the two pyridine nitrogen atoms. In the crystal there are also weak interactions of the perchlorate counterions with the silver atom. Addition of [Cu(MeCN)4]BF4 to compound 5b gives the Cu/Au-complex with P,P-coordinated gold and N,N-bonded copper centers. All products were characterized by standard analytical and spectroscopic techniques; the crystal structure of complex 6 was determined in a single crystal X-ray diffraction study.
AB - The reaction of 2-diphenylphosphino-pyridine (1) with AgBF4 in an equimolar ratio affords the cyclic, dinuclear complex 2 with mixed P,N-coordination of the metal atoms. With two equivalents of 1 the 2:1 complexes 4a,b are formed which have the metal atoms solely P-coordinated. The previously reported gold complex (3), an analogue of 2, or [Au(tht)2]ClO4 (tht = tetrahydrothiophen) also give the 2:1 complexes (5a,b) when treated with an excess of ligand 1. Addition of AgClO4 to a solution of 5a in acetone, or treatment of 4a with [Au(tht)2]ClO4 in dichloromethane, give the same mixed-metal complex 6, where the Au atoms are exclusively P-coordinated, while the Ag atoms are coordinated by the two pyridine nitrogen atoms. In the crystal there are also weak interactions of the perchlorate counterions with the silver atom. Addition of [Cu(MeCN)4]BF4 to compound 5b gives the Cu/Au-complex with P,P-coordinated gold and N,N-bonded copper centers. All products were characterized by standard analytical and spectroscopic techniques; the crystal structure of complex 6 was determined in a single crystal X-ray diffraction study.
KW - 1-Pyridyl-diphenylphosphine
KW - 2-(Diphenylphosphino)-pyridine
KW - Ambidentate ligand
KW - Copper(I)
KW - Goid(I) coordination
KW - Silver(I)
UR - http://www.scopus.com/inward/record.url?scp=0040563402&partnerID=8YFLogxK
U2 - 10.1515/znb-1997-0210
DO - 10.1515/znb-1997-0210
M3 - Article
AN - SCOPUS:0040563402
SN - 0932-0776
VL - 52
SP - 203
EP - 208
JO - Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
JF - Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
IS - 2
ER -