作者vitamin1003 (小翔)
看板Chemistry
标题Re: 请问判断无机光学活性
时间Sun Jan 14 21:40:58 2007
※ 引述《happysister (...)》之铭言：
: 疯狂读读看的无机
: 里面在群论那一节有一题92中兴
: Which of the following symmetry elements is the best criteria for chirality?
: A inversion center
: B mirror plane
: C proper rotation axis
: D improper rotation axis
: 它写答案是b
: 可是对称元素里若有sigma或其他的非徵转轴(i,Sn..)不就没有光学了吗??
: 一开始光学的定义不就是...In general,we can say that a molecule or some other
: object is chiral if it has no symmetry operations(other than E)or if it has
: only proper rotation axes.
: 麻烦大家了...>"<
见 Huheey
Optical active molecules must be dissymmetry
Dissymmetry : molecule with no improper rotation axis
所以只要判断有无 improper rotation axis 就可知道是否为光学活性
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