In contrast to CH3CH2(CH3)CO+CH3 and (CH3)2CHCHO+CH3, which in slow dissociations lose mainly CH3OH, metastable CH3CH2CH2CHO+CH3 exples predominantly CH2O by isomerising to CH3CH2CH2CH2+OCH2, probably via two 1,2-H shifts and a subsequent 1,5-H shift; CH3CH2CH2+OCH2 undergoes limited interconversion with CH3+CHCH2CH2OCH3, prior to CH2O elimination, via a 1,5-H shift.
CH2(
CH3)CO+ 和 ( )2CHCHO+ 在缓慢解离过程中主要损失 OH,与之相反,蜕变的 CH2CH2CHO+ 通过异构化为 CH2CH2CH2+OCH2 主要释放出
CH2O,可能是通过两次 1,2-H 移位和随后的 1,5-H 移位; CH2CH2+OCH2 与 +CHCH2 发生有限的相互转化,然后通过 1,5-H 移位消除 。