A NEW CARBON HYDROGEN-BOND ACTIVATION REACTION - STEREOSPECIFIC ABSTRACTION OF VINYLIC PROTONS FROM RHENIUM ALKENE COMPLEXES [(ETA-5-C5H5)RE(NO)(PPH3)(H2C=CHR)]+BF4-BY THE BASE TERT-BUO-K+
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abstract
The title reaction gives the vinyl complexes (5-C5H5)Re(NO)(PPh3(CH=CHR) for R = CH(CH3)2 and C6H5; deuterium labeling and NMR experiments show that only one of the two geminal alkene ligand protons is abstracted.