Geminal dehydrogenation of a C(sp3) CH2 group by unsaturated Ru(II) or Os(II)†
Abstract
Dimeric
[RuHClL2]2
(L = PPr3i), a source of the 14-electron fragment
RuHClL2, reacts at reflux in THF to cleanly form equimolar
L2HClRuC(CH2)3O and RuHCl(H2)L2, the products of stoichiometric
geminal dehydrogenation of the α-C of THF. The same
products are produced slowly at 25 °C by reaction of the transient
RuHClL2. Double dehydrogenation of the sp3 α-C of THF is also effected at 25 °C by Os(H)3ClL2 if two H
CH2.