Pi-accepting-pincer rhodium complexes: an unusual coordination mode of PCP-type systems.
The novel pi-accepting, pincer-type ligand, dipyrrolylphoshinoxylene (DPyPX), is introduced. This ligand has the strongest pi-accepting phosphines used so far in the PCP family of ligands and this results in some unusual coordination chemistry. The rhodium(I) complex, [(DPyPX)Rh(CO)(PR3)] (4, R=Ph, Et, pyrrolyl) is prepared by treating the relevant [(DPyPX)Rh(PR3)] (3) complex with CO and is remarkably resistant to loss of either ligand. X-ray crystallographic analysis of complex 4 b (R=Et) reveals an unusual cisoid coordination of the PCP phosphine ligands. These observations are supported by density functional theory (DFT) calculations.
Kossoy
Elizaveta
E
Department of Organic Chemistry, Weizmann Institute of Science, Rehovot, 76100, Israel.
Iron
Mark A
MA
Rybtchinski
Boris
B
Ben-David
Yehoshoa
Y
Shimon
Linda J W
LJ
Konstantinovski
Leonid
L
Martin
Jan M L
JM
Milstein
David
D