作者:Ryan T. Bise、Alexandra A. Hoops、Daniel M. Neumark
DOI:10.1063/1.1367411
日期:2001.5.22
distributions reveal a resolved vibrational structure of the N2 fragment, suggesting that the HNCN radical first isomerizes to a cyclic HCN2 intermediate. A dissociation mechanism is proposed in which electronically excited HNCN undergoes internal conversion to the ground state, followed by isomerization to cyclic HCN2 and dissociation through a tight three-center transition state. The HNCN bond dissociation
HNCN 自由基的光解光谱和动力学已经通过快速光束光断裂平移光谱进行了研究。观察到 B 2A′←X 2A″ 带和分配给 C 2A″←X 2A″ 带的高能带系统的预解离跃迁。光碎片质量分布表明 N2 损失是主要的解离途径。平移能量分布揭示了 N2 片段的解析振动结构,表明 HNCN 自由基首先异构化为环状 HCN2 中间体。提出了一种解离机制,其中电子激发的 HNCN 内部转化为基态,然后异构化为环状 HCN2,并通过紧密的三中心过渡态解离。