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).
兩種不同的分子Xabcd和Xabce, 可以說是具有相同的相對配置如果 é取的D的位置在四面體 X配置周圍配體(即金字塔的碎片Xabc是superposable)。
By the same token the enantiomer of Xabce may be said to have the opposite relative configuration to Xabcd.
通過同樣的, 對映體的Xabce 可以說是相反的相對配置到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 .
該條款可以適用於其他手性環比碳原子與分子實體,但僅限於有關情況下,兩個不同的一個單分子配體 。