The Simplest, Isolable, Alkynyl Isocyanate HC≡CNCO: Synthesis and Characterization
作者:Yuanyuan Qin、Bo Lu、Guntram Rauhut、Manfred Hagedorn、Klaus Banert、Chao Song、Xianxu Chu、Lina Wang、Xiaoqing Zeng
DOI:10.1002/anie.201911102
日期:2019.11.25
(2 mbar, 300 K) with a melting point of -79.5 °C and vaporization enthalpy (ΔHvap ) of 23.1(1) kJ mol-1 . Apart from the IR (gas, solid, and matrix), 1 H and 13 C NMR, and UV/Vis spectroscopic characterization, its photoisomerization with a acylnitrene HC≡CC(O)N and cyanoketene NCC(H)CO has been observed.
炔基异氰酸酯已被假定为合成化学中的高反应性中间体。本文中,首次分离出母体分子HC≡CNCO。与先前报道的室温下短寿命(约15 s)形成鲜明对比,我们发现HC≡CNCO在气相(2 mbar,300 K)下的寿命为55 h,熔点为-79.5° C和23.1(1)kJ mol-1的汽化焓(ΔHvap)。除了IR(气体,固体和基质),1 H和13 C NMR以及UV / Vis光谱表征外,还观察到它是通过酰基亚硝基HC≡CC(O)N和氰基烯NCC(H)CO进行光异构化的。