Trifluoromethyl-Containing Transition Metal Complexes

Synthesis and NMR spectroscopic investigation of salts containing the novel [Au(CF3)nX4−n]− (n=4–1, X=F, CN, Cl) anions

“…Numerous trifluoromethyl complexes of transition metals have been prepared since 1949, mainly by CF 3 -transfer reactions [1]. Examples are:…”

“…(2)) [1,2]: (2) (iii) CF 3 À group transfer using either Cd(CF 3 ) 2 L 2 (L ¼ CH 3 CN, DME, dioxane, diglyme) (Eqs. (3) and (4)) [1,[3][4][5][6][7], or (CH 3 ) 3 SiCF 3 [8][9][10]:…”

“…2AuðCF 3 ÞðPMe 3 Þ þ CdBr 2 (4) (iv) Thermal decomposition of complexes containing CF 3 CO À or CF 3 CO 2 À ligands (Eqs. (5)- (7)) [1]:…”

“…cis-PtClðPMePh 2 Þ 2 ðCF 3 Þ þ CO (7) (v) Reaction of metal atoms with CF 3 radicals (Eq. (8)) [1,11]:…”

“…Despite several gold(III)-, gold(II)-and gold(I)-trifluoromethyl complexes being described: [Au(CF 3 ) 4 ] À [6], Au(CF 3 ) 3 (PR 3 ) (R ¼ Ph, Me, Et) [3,11], Au(CF 3 ) 2 X(PR 3 ) (X ¼ I; R ¼ Me) [3], Au(CF 3 )X 2 (PR 3 ) (X ¼ Me, I; R ¼ Ph, Me) [2,12], (CF 3 )Au(CH 2 PPh 2 CH 2 ) 2 AuCF 3 [5] and Au(CF 3 )(PR 3 ) (R ¼ Ph, Me, Et) [2][3][4]12], so far no examples of related gold trifluoromethyl complexes with fluoro, chloro or cyano ligands are known [1].…”