MNDO calculations and group theory were carried out on tetraphenyl porphyrine(TPP) to obtain its optimum molecular geometry.
运用MNDO群论,优化得到了较满
中位取代四苯基卟
(H2TPP)
子构型。
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In the 1970s, mathematician John McKay was making a switch to studying group theory to an adjacent field, and he noticed that a number very similar to this 196,883 showed up in a completely unrelated context, or at least, almost.
20世纪70年代, 数学家约翰·麦凯转而研究一个相邻领域,他发现一个与196,883非常相似
数字出现在了一个完全不相关
背景中,或者至少是几乎不相关。