An exotic ternary S, N, O heterocumulene OSNSO in syn-syn (A) and syn-anti (B) conformations has been generated in the gas phase through flash vacuum pyrolysis of CF3S(O)NSO at 700 K. Upon visible light irradiation (570 ± 20 or 532 nm), both A and B, isolated in cryogenic matrices (N2, Ne, Ar, and Kr, <30 K), convert to a higher-energy anti-anti conformer (C). The reverse conformational transformation occurs either through S═N bond rotation (C to A and B) under visible light irradiation (400 ± 20 nm) at 2.8 K or through thermal nitrogen inversion (C to A) in the temperature range of 20-30 K, for which an exceptionally low activation barrier of 1.18 ± 0.07 kcal mol-1 has been experimentally determined.

中文翻译：

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异聚草烯 OSNSO 中的光致硫氮键旋转和热氮转化

通过在 700 K 下对 CF3S(O)NSO 进行快速真空热解，在气相中生成了具有 Syn-syn (A) 和 Syn-anti (B) 构象的奇异三元 S、N、O 杂草枯烯 OSNSO。 （570 ± 20 或 532 nm），A 和 B，在低温基质（N2、Ne、Ar 和 Kr，<30 K）中分离，转化为更高能量的抗反构象异构体 (C)。在 2.8 K 的可见光照射 (400 ± 20 nm) 下，通过 S=N 键旋转（C 到 A 和 B）或在 20-30 ℃的温度范围内通过热氮反转（C 到 A）发生逆构象转变K，通过实验确定了 1.18 ± 0.07 kcal mol-1 的异常低激活势垒。