Ag(I) and Au(I) complexes of sterically crowded cyclic phosphinimine ligands.
Cyclic phosphinimines are strong bases with structural similarities to carbene ligands. The cyclic phosphinimines R(2)PNCPh(2)(CH(2)CH(CO(2)Me)) (R = Ph 4, i-Pr 5, Me 6), R(2)PNCPh(2)(CCOMe)(2) (R = Ph 7, i-Pr 8) and Ph(2)PNCPh(2)(CH(2)CH(CN)) 9 are readily prepared via cycloaddition of the compounds R(2)PNCPh(2) (R = Ph 1, i-Pr 2, Me 3) and olefins or alkynes. In the case of 4 this phosphinimine proved to be moisture sensitive, converting to Ph(2)C(NH(2))CH(CO(2)Me)CH(2)P(O)Ph(2)10 upon hydrolysis. Nonetheless, the Ag(i) and Au(i) complexes [{Ph(2)PNCPh(2)(CH(2)CH(CO(2)Me)}(2)Ag][NO(3)] 11 (Ph(2)PNCPh(2)(CH(2)CH(CO(2)Me)AuCl 12 and (Ph(2)PNCPh(2)(C(CO(2)Me)(2))AuCl 13 were prepared and characterized. Compounds 1, 2 and 7-13 have been characterized crystallographically.
Brown
Christopher C
CC
Department of Chemistry, University of Toronto, 80 St. George St. Toronto, Ontario, CanadaM5S 3H6.
Glotzbach
Christoph
C
Stephan
Douglas W
DW