Catalytic Hydrosilylation of Alkenes by Iron Complexes Containing Terpyridine Derivatives as Ancillary Ligands

Iron complexes formulated as Fe­(terpy)­X2 (terpy = 2,2′:6′,2″-terpyridine derivatives;
X = Cl, Br) were prepared and their catalytic activities for hydrosilylation
of olefin with hydrosilane were examined. Although Fe­(terpy)­X2 did not show catalytic activity, the treatment of Fe­(terpy)­X2 with NaHBEt3 caused catalytic activity. The influence
of substituents in terpy on the catalytic activity was examined, and
it was found that some complexes with an unsymmetrically disubstituted
terpy selectively produced 1-silylalkane with quite high catalytic
activity. In the reaction of 1-octene with PhSiH3, the
double-hydrosilylation product Ph­(1-octyl)2SiH was
selectively obtained.