Illustrated Glossary of Organic Chemistry - R group

Illustrated Glossary of Organic Chemistry

R group: An abbreviation for any group in which a carbon or hydrogen atom is attached to the rest of the molecule. Sometimes used more loosely, to include other elements such as halogens, oxygen, or nitrogen. R is an abbreviation for radical, when the term radical applied to a portion of a complete molecule (not necessarily a free radical), such as a methyl group. Should not be confused with R (the gas constant), R (the one-letter abbreviation for the amino acid arginine) or R (a designation of absolute configuration).


R = ?		R = CH₃ Toluene		R = H Benzene		R = Ph Biphenyl

Related terms: Acetyl group, activating group, acyl group, alkanoyl group, alkoxy group, alkyl group, allyl group, amino group, benzoyl group, benzyl group, butyl group, carbonyl group, carboxyl group, deactivating group, directing group, electron donating group, electron releasing group, electron withdrawing group, ethyl group, formyl group, functional group, hydroxyl group, isobutyl group, isopropyl group, leaving group, methine group, methoxy group, methyl group, methylene group, nitro group, phenyl group, phosphate group, propargyl group, propyl group, protecting group, sec-butyl group, sulfhydryl group, tBDMS group, tBDPS group, tert-butyl group, TMS group, trifluoromethyl group, vinyl group, substituent
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