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An atom or group substituted for another in a chemical compound.
Of or relating to such an atom or group.

[Latin substituēns, substituent-, present participle of substituere, to substitute; see substitute.]


(Chemistry) chem an atom or group that replaces another atom or group in a molecule or can be regarded as replacing an atom in a parent compound
substituted or substitutable
[C19: from Latin substituere to substitute]


(sʌbˈstɪtʃ u ənt)

an atom or atomic group that takes the place of another atom or group present in the molecule of the original compound.
[1890–95; < Latin substituent-, s. of substituēns, present participle of substituere to substitute; see -ent]
References in periodicals archive ?
The compound 6 bearing 3,5-dibromo-4-hydroxyphenyl and compound 12 p-methyl phenyl substituents showed potent activity (9.
Specifically, indoles possessing a variety of electronically different substituents, including halogen, alkyl, alkoxy, cyano and methoxy carbonyl groups at different positions on the bezene ring undergo reaction to produce the corre-sponding substituted tertiary alcohol in good to ex-cellent yields (Table 2, compounds 4, 5, 7-12, 14, 16-21).
Different substituents have been implemented in cobalt ferrites to investigate the electrical and magnetic properties so as to identify the variations in its characteristics [9-10].
Objective: Enantiopure quaternary amino acids, carrying two carbon-based substituents at the a carbon, are one of the most important groups of modified a amino acids, of great commercial value in the development of new pharmaceuticals and agrochemicals.
P-Xylene is an aromatic hydrocarbon based on benzene with two methyl substituents with the chemical formula C₈H₁₀ or C₆H₄(CH₃)₂.
Applications of viologens [1] cannot be limited to its short alkyl group substituents.
In other words, differences in the birefringence properties of PPFPhMA, PPhMA, and PTFEMA as compared to PMMA are caused by the contributions of the substituents on each polymer.
We also evaluated cellulose tribenzoate derivatives with various substituents on the phenyl groups, and found that tris(4-methylbenzoate) showed a much better chiral recognition than cellulose tribenzoate to many racemates.
Hypothesis: The reaction conducted on benzaldehydes with electron-donating substituents may result in even larger shifts towards the products of the secondary and tertiary Leuckart reactions.
The structure of the side-chain substituents on the polymer backbone is a major compositional factor, impacting polymer functionality.
Cyclobutane is condensed to aromatic rings such as benzene, naphthalene, anthracene, and pyrene and may have different substituents such as alkyl, alkoxy, alkylthio, and aryl groups.
The results suggest that alkyl substituents lead to the rccc conformation while aryl substituents would lead to the rctt conformation.