Generation of 1, 2-Bisketenes from Cyclobutene-1, 2-diones by Flash Photolysis and Ring Closure Kinetics1a

…, J Lusztyk, J Ma, MA McAllister, Y Rubin…

文献索引：Allen, Annette D.; Colomvakos, Jim D.; Diederich, Francois; Egle, Ian; Hao, Xiaokuai; Liu, Ronghua; Lusztyk, Janusz; Ma, Jihai; McAllister, Michael A.; Rubin, Yves; Sung, Kuangsen; Tidwell, Thomas T.; Wagner, Brian D. Journal of the American Chemical Society, 1997 , vol. 119, # 50 p. 12125 - 12130

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被引用次数: 24

摘要

The interconversion of cyclobutene-1, 2-diones (1) and 1, 2-bisketenes (RC CO) 2 (2) has been surveyed for different combinations of substituents R= H, Me, t-Bu, Ph, Me3Si, CN, Cl, Br, R1O, alkynyl, and PhS. The bisketenes 2 have been generated by flash photolysis, and the kinetics of their conversion to 1 have been studied by time-resolved infrared and ultraviolet spectroscopy. The rate constants of the ring closure of 2 are correlated by the ...