作者:Xiaoqing Zeng、Helmut Beckers、Helge Willner、Dirk Grote、Wolfram Sander
DOI:10.1002/chem.201002955
日期:2011.3.28
The elusive triplet fluorocarbonyl nitrene, FC(O)N (X3A′′), has been generated in high yield from matrix‐isolated FC(O)N3 by ArF excimer laser photolysis (λ=193 nm). As a side product FNCO was formed. The novel nitrene was characterized by IR, UV/Vis, EPR spectroscopy, and quantum‐chemical calculations. All six fundamental vibrations of FC(O)N at 1681.3, 1193.8, 879.8, 646.5, 588.7, and 434.8 cm−1
通过ArF受激准分子激光光解法(λ = 193 nm)从基质分离的FC(O)N 3高产率地产生了难以捉摸的三重态氟代羰基碳氮化合物FC(O)N(X 3 A'' )。作为副产物,形成了FNCO。通过IR,UV / Vis,EPR光谱和量子化学计算来表征这种新型的腈。FC(O)N在1681.3、1193.8、879.8、646.5、588.7和434.8 cm -1(氩气矩阵,16 K)下的全部六个基本振动,它们的12/13 C,16/18 O和14/15 N同位素位移和T 0 = 13 890、25 428、29 166和30 900 cm -1处的四个电子跃迁已经检测到显示出振动精细结构的材料。下可见光照射在λ ≥495纳米,FC(O)N与分子反应Ñ 2在基质笼在-6 K给回FC(O)N 3,而近UV照射在λ ≥335纳米得到FNCO 。讨论了不同羰基腈的单重态-三重态能隙。