HF infrared chemiluminescence, energy partitioning, and D(H–GeH3) from the reaction of F atoms with germane

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Abstract
The infrared emission intensities from the reaction F+GeH4 have been used to measure the energy partitioned to the HF product. The experiments were conducted in a cold‐walled reactor with various flow rates of GeH4 and fluorine atom source (discharged SF6 or CF4). Based on the highest observed HF vibrational‐rotational level, D(H–GeH3) was estimated as ≤78 kcal mole−1. The initial relative vibrational populations were N(ν = 1): N(ν = 2): N(ν = 3): N(ν = 4): N(ν = 5) = 0.10:0.18:0.29:0.41: 0.02. Based upon D(H–GeH3) = 78 kcal mole−1, the mean fractional conversion of energy into HF vibrational energy was 0.58. The rotational distributions extend to quite high J levels; after correction for some rotational relaxation the mean fractional conversion to HF rotational energy was estimated as 0.12.