文摘
X-ray crystallographic analysis of red crystalsformed on mixing octacarbonyldicobalt(0) and BINAP,combined with NMR evidence obtained from a catalyticasymmetric Pauson-Khand reaction, suggests that thiscomplex is a precatalyst to this reaction and leads to anew hypothesis for the role of axially chiral diphosphanes in the catalytic asymmetric Pauson-Khandreaction.