The mode of olefin rotation in [Os(CO)NO(C2H4)(PPh3)2]PF6

Abstract
The first direct experimental evidence that indicates the axis and mode of rotation of co-ordinate olefin molecules has been obtained from variable temperature 1H and 13C n.m.r. studies on the complex [Os(CO)NO(C2H4)(PPh3)2]PF6.