Photodissociation of the i-C₃H₇O radical is investigated using fast beam photofragment translational spectroscopy. Neutral i-C₃H₇O radicals are produced through the photodetachment of a fast beam of i-C₃H₇O⁻ anions and are subsequently dissociated at 248 nm (5.0 eV). The dominant product channels are CH₃ + CH₃CHO and OH + C₃H₆ with some contribution from H + C₃H₆O. The CH₃ and H loss channels are attributed to dissociation on the ground electronic state of i-C₃H₇O, but in a nonstatistical manner because calculated RRKM dissociation rates exceed the rate of energy randomization. Translational energy and angular distributions for OH loss are consistent with ground state dissociation, but the branching ratio for this channel is considerably higher than predicted from RRKM rate calculations. Additionally, i-C₃H₇O undergoes three-body fragmentation to CH₃ + CH₃ + HCO and CH₃ + CH₄ + CO. These three-body channels are attributed to dissociation of i-C₃H₇O to CH₃ + CH₃CHO, followed by secondary dissociation of CH₃CHO on its ground electronic state.

中文翻译：

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异丙氧基（i-C3H7O）自由基在248 nm处的光解离。

iC ₃ H ₇ O自由基的光解离使用快速光束片段平移光谱学进行了研究。中性IC ₃ ħ _7个O自由基通过IC的快速束的光致产生的₃ ħ ₇ ö ^-阴离子和在248nm（5.0电子伏特），随后解离。占主导地位的产物通道是CH ₃ + CH ₃ CHO和OH + C ₃ H ^ ₆与选自H + C一些贡献₃ ħ ₆ O的CH ₃和H损失信道被归因于解离于IC的基电子态₃H ₇ O，但采用非统计方式，因为计算出的RRKM解离速率超过了能量随机化速率。OH损失的平移能和角分布与基态解离一致，但是该通道的分支比大大高于RRKM速率计算所预测的比率。此外，iC ₃ H ₇ O经历三体断裂，成为CH ₃ + CH ₃ + HCO和CH ₃ + CH ₄ + CO。这些三体通道归因于iC ₃ H ₇ O分解为CH ₃ + CH ₃ CHO，然后进行CH的二级解离₃ CHO处于其基础电子状态。