Both definitions can be generalised to include stereogenic units other than asymmetric centres.這兩個定義可以推廣到包括手性以外的其他單位的非對稱中心。
基本介紹
- 中文名：相對構型
- 包括：手性以外的其他單位的非對稱中心
- 構型：包含在同一分子實體
- 適用於：其他手性環比碳原子與分子實體
定義,區別,配置,適用範圍,
定義
The configuration of any stereogenic (asymmetric) centre with respect to any other stereogenic centre contained within the same molecular entity .
與包含在同一分子實體的任何其他手性中心相關的任何手性中心的構型。
區別
Unlike absolute configuration, relative configuration is reflection-invariant.
不像絕對構型，相對構型是反射不變。
Relative configuration, distinguishing diastereoisomers, may be denoted by the configurational descriptors R*, R* (or l) and R*, S* (or u) meaning, respectively, that the two centres have identical or opposite configurations.
相對構型，區分映異構體， 可能是那些以相反的配置構描述的R *，R *的（或L）和R *，下*（或U）的含義，分別為這兩個中心有相同或。
配置
For molecules with more than two asymmetric centres the prefix rel- may be used in front of the name of one enantiomer where R and S have been used. If any centres have known absolute configuration then only R* and S* can be used for the relative configuration .
對於兩個以上的分子不對稱前綴中心的rel， 可能是用於一個前方的名義對映體 ，其中R和S已被使用。 如果有任何已知的絕對中心配置那么唯一的研發和S * *可以是用於相對配置 。 See also參見 (alpha), （α）， (beta) (1) and (3). （β）（1）及（3）。
Two different molecules Xabcd and Xabce, may be said to have the same relative configurations if e takes the position of d in the tetrahedral arrangement of ligands around X (ie the pyramidal fragments Xabc are superposable).
By the same token the enantiomer of Xabce may be said to have the opposite relative configuration to Xabcd.
適用範圍
The terms may be applied to chiral molecular entities with central atoms other than carbon but are limited to cases where the two related molecules differ in a single ligand .
