论文部分内容阅读
问题的提出周环反应是近代有机化学的一个基本内容,一般文献或参考书介绍周环反应往往头绪太多,规则繁琐,难以记忆和应用,而讨论理论问题时,对许多读者感兴趣的问题,又往往未说明其所以然,结果使得人们在学过之后,脑中总还带着许多问号。近年来,拓扑学进入有机化学,利用拓扑学的思想和方法分析周环过程,可以简洁地描述过程的本质,清楚、直观地阐明周环理论中难以理解的许多问题,从而使人们对反应规则的理解大大简化和明确化。
The problem is put forward Weekly reaction is a modern organic chemistry, a basic content, the general literature or reference books are often too many clues to the reaction cycle, the rules are cumbersome, difficult to remember and apply, and discuss the theoretical issues, many readers are interested in the problem , But often do not explain why they are so, the result makes people learned, the brain always with many question marks. In recent years, topology has entered into organic chemistry and analyzed topological processes by using topological thinking and methods. It can describe the nature of the process succinctly and clarify many problems that are difficult to understand in the peripheral theory clearly and intuitively so as to make people understand the reaction rules The understanding is greatly simplified and clarified.