UV laser photochemistry of pentaborane(9) at 193 nm: quantum yield of primary BH 3 formation and its subsequent chemistry

Abstract

Excitation of B 5H 9 in the gas phase by ArF laser radiation at 193 nm causes primary dissociation into BH 3 plus B 4H 6. Rapid recombination probably leads to the reactive intermediate B 5H 7, which upon addition to B 5H 9 forms B 10H 14 and B 10H 16. B 6H 10 production as well as polymerization can be understood to proceed via the intermediate B 8H 12, which arises from the dimerization of B 4H 6 fragments.