Benzene C-D bond activation by free vanadium cluster cations

摘要: Reaction of free V{sub x}{sup +} (x < 20) with C{sub 6}D{sub 6} is found to proceed via facile initial chemisorption followed by activated C-D cleavage and D{sub 2} elimination. Species varying deuterium content x}C{sub m}{sup (m = 0, 2, 4, 6) are produced, whose relative abundances in turn vary considerably cluster size. Further, sequential dehydrogenation channels observed for several the clusters. In contrast reaction Nb{sub x}, +}, Pt{sub Rh{sub which primarily m 0 6 formed, all larger than trimer also give rise partially dehydrogenated species 2 or 4. A global correlation between probability formation rate implicates valence electronic structure activation process. Deviations from this exhibited 13}{sup 14}{sup interpreted as evidence a relatively compact and/or symmetric these two