更新 'anatolia-modified.md'

anatolia-modified.md

@@ -23,12 +23,15 @@ https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/full/10.1002/mrc.4
 
 ### determining the Number of signals in NMR Spectrometer
 
-其实就是想判断等价原子的分类情况。对于核磁，有一种磁等价和化学等价。
+#### 氢谱的核磁信号个数
 
-- 旋转对称互换，等位质子，化学等价
-- 镜面对称，対映异位质子，化学等价（手性溶剂中不是）
+主要就是判断化学等价（Chemical shift equivalence）
 
-磁等价，要先满足化学等价，然后与其他任意有磁核的耦合常数也相同。
+- reflection through a mirror plane in the molecule
+- rotation of the molecule itself
+- fast bond rotation （困难，C-C的旋转）
+
+后面才判断两个氢同接在一个碳上面的情况，分为Homotopic，enantiotopic, diastereotopic。
 
 
 有相关的文章探讨了分子的对称性，[Simple Algorithms for Determining the Molecular Symmetry](https://pubs.acs.org/doi/10.1021/ci990322q), [Identification of Symmetries in Molecules and Complexes](https://pubs.acs.org/doi/full/10.1021/ci049966a),[New computer program to calculate the symmetry of molecules](https://www.degruyter.com/document/doi/10.2478/BF02475193/html)这篇文章提供了MATLAB算法。
@@ -52,4 +55,6 @@ Program：
 
 ![](https://1.bp.blogspot.com/-Sj9ofM95cGQ/X3iRQP_3n5I/AAAAAAAALp8/L3dJvHpc1iYRyXYdAynBILxsQuTckogewCLcBGAsYHQ/w640-h360/pic%2B7.jpg)
 
-![](https://1.bp.blogspot.com/-Oy8CsSp74EA/X3iRoN6aURI/AAAAAAAALqE/pPIPSDJjtm8Zo2swcTd1KiiJjZ0nB-q3gCLcBGAsYHQ/w640-h176/Pic%2B14.tif)
+![](https://1.bp.blogspot.com/-Oy8CsSp74EA/X3iRoN6aURI/AAAAAAAALqE/pPIPSDJjtm8Zo2swcTd1KiiJjZ0nB-q3gCLcBGAsYHQ/w640-h176/Pic%2B14.tif)
+
+#### 13C谱的个数