The term “alkylene” by itself or as part of another substituent means a divalent radical derived from an alkane, having the number of carbon atoms indicated in the prefix, as exemplified by —CH2CH2CH2CH2—. Typically, an alkyl (or alkylene) group will have from 1 to 24 carbon atoms, ...
Enantiomers whose absolute configurations are not known may be differentiated as dextrorotatory (prefix +) or laevorotatory (prefix −) depending on the direction in which, under specified experimental conditions, they rotate the plane of polarized light. When equal amounts of enantiomeric molecules...
When the term "alkyl" or prefix "alk" (such as in alkoxy) is used without qualification (such as the term "lower"), a branched or unbranched saturated hydrocarbon chain having from 1 to 12 carbon atoms is contemplated. "Lower alkoxy" means the group --OR wherein R is lower alkyl ...