Dichlorostannylene complexes of group 10 metals, a unique bonding modestabilized by bridging 2-pyridyldiphenylphosphine ligands

摘要

The reaction of tin dichloride with catalytically-relevant group 10 metal precursors [M(Cl)(X)(2-PyPPh_2)_2] (M = Ni, Pd, Pt; 2-PyPPh_2= 2-pyridyldiphenylphosphine; X = Cl, Me) provides easy access to unprecedented cationic dichlorostannylene complexes[M(X)(2-PyPPh_2)_2(SnCl_2)]~+ where the M—Sn bond is bridged by two head-to-head coordinated2-PyPPh_2ligands. The formation of such species instead of the classical neutral trichlorostannylderivatives [M(X)(SnCl_3)(2-PyPPh_2)_2]offers a new insight on the specific effect of the SnCl_2cocatalystin group 10 metal catalyzed transformations