(a) Two-electron reduction of B5H9 followed by protonation is a convenient route to B5H||. What structural change (and why) do you expect the Bs cage to undergo during this reaction?
(b) Account for the fact that the solution MB NMR spectrum of [B3Hg]~ (13.40) exhibits one signal which is a binomial nonet.
(c) The photolysis of B5H9 leads to the formation of 1 mixture of three isomers of B|()H|6. The products arise from the intermolecular elimination of H, Suggest the nature of the product, and the reason that three isomers are formed.
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