Hydrogen-deuterium exchange of the anionic Group VIB transition-metal hydrides. Convenient, in situ deuterium transfer reagents

摘要: The facile exchange of hydrogen for detuerium in the anionic group 6B carbonyl hydrides HM(CO)/sub 4/L/sup -/(M = Cr, W; L CO P(OMe)/sub 3/) has been studied THF/sub 4/ (tetrahydrofuran) with CH/sub 3/OD, D/sub 2/O, and 3/CO/sub 2/D. This provided a synthesis deuterides, DM(CO)/sub -/, as well convenient situ source deuteride reducing reagents organic halides. A number such reductions are described, using /sup 2/H NMR to demonstrate both selectivity stereospecificity certain systems. region infrared spectra is not affected by deuteration hydrides, suggesting that M-H or M-D vibrational modes coupled significantly vibrations these hydrides. mechanism H/D related H/sub 2/ elimination reaction discussed.