Abstract

AbstractThe gas‐phase reactions between silane and three isovalent metal ions Sc+, y+ and Lu+ are investigated using a Fourier‐transform ion cyclotron resonance mass spectrometer. In contrast to its carbon analogue methane, silane exhibits very different behaviour towards these three metal ions. Lu+ is unreactive sdtowards silane even with a translational activation of the metal ion. The reaction is slow and endothermic with Sc+. It leads first to the formation of ScH+, and ScSIH, and then to the formation fo ScSiH. Slow sequential reactions are observed with the ion ScSiH to give ScSinH, ScSinH, ScSinH and ScSi up to a value of n=3. By contrast to Sc+, only the emtal silylene ion YSiH is observed in the tirst step of the rapid and exothermic reaction of Y+ with silane. YSiH then undergoes a rapid sequintial reaction to give YSinH and YSinH, ions up to a value of n=7.

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