To illustrate some of the features of the equilibrium phenomenon, let us look at the reaction in which cyclobutene is isomerized to 1.3-butadiene. 为了说明平衡现象,让我们看一下环丁烯异构成1.3一丁二烯的反应。
Different synthetic routes of squaric acid ( 3,4 dihydroxy cyclobutene 1,2 dione) are summarized. The limitations and advantages of particular routes are discussed. 介绍了方酸(3,4二羟基3环丁烯1,2二酮)的各种合成方法,评述了有机化学、电化学、生物发酵等方法合成方酸的进展及应用前景。
Finite Field Study of Nonlinear Optical Properties of Cyclobutene-1,2-dione Derivatives 有限场方法研究环丁烯-1,2-二酮衍生物的非线性光学性质