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自然科学的发展,总是理论与实验相互配合着发展的一个辩证过程,即实验——理论——实验,循环上升地不断发展.有机化学的发展也不例外.理论有机化学的各种观点,促使实验有机化学蓬勃发展,而旧的理论与新的实验现象之间的矛盾,又为新的理论的发展提供了素材和提出了课题.有机化学中的。电子理论”就是这样发展起来的.该理论最重要的观点之一是“电荷密度”,用这种观点曾成功地解释了不少有机化学的经验规律.但有许多实验现象仅用“电荷密度”是不能解释的,因而又出现了新的理论,其中最著名的当推Woodward-Hoffmann规则,或称“轨道对称性守恒原理”~([1]),它成功地用于解释并预言
The development of natural science is always a dialectical process in which theory and experiment cooperate with each other, that is, experiment-theory-experiment, which is continuously developing in a cyclic and upward manner. The development of organic chemistry is no exception.In all aspects of theoretical organic chemistry, Promote the rapid development of experimental organic chemistry, and the contradiction between the old theory and the new experimental phenomena, but also for the development of new theory has provided material and proposed the topic of organic chemistry. This is the case of “electronic theory.” One of the most important points of view of this theory is the “charge density,” which has successfully explained many of the empirical laws of organic chemistry, but many of the experimental phenomena only use “charge density ”It can not be explained that new theories have emerged again. The most famous one is the Woodward-Hoffmann rule, or the principle of conservation of orbital symmetry ~ ([1]), which is successfully used to explain and predict