substituent

(redirected from substituents)
Also found in: Medical, Encyclopedia.

sub·stit·u·ent

 (səb-stĭch′o͞o-ənt)
n.
An atom or group substituted for another in a chemical compound.
adj.
Of or relating to such an atom or group.

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

substituent

(sʌbˈstɪtjʊənt)
n
(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
adj
substituted or substitutable
[C19: from Latin substituere to substitute]

sub•stit•u•ent

(sʌbˈstɪtʃ u ənt)

n.
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 aim of the present study was to model apparent serum half-lives of polybrominated diphenyl ethers (PBDEs) with 7-10 bromine substituents.
For example, 1,3-DMU with 2 methyl substituents was present in amounts ~5-fold less than those of monomethyl 7-MUA.
Chemists have tried to model these interactions by the synthesis of receptors that interact with sulfate via well-placed hydrogen bond donor groups and positively charged substituents.
The four PDZ2-binding compounds identified in this work are all flavones sharing the same skeleton differing only in one of the substituents in ring A and its location.
Aromatic compounds containing both electron donor and acceptor substituents are highly polar and their UV spectra can be sensitive to solvent polarity and hydrogen bonding.
10:30 INFLUENCE OF AMINO SUBSTITUENTS ON THE ENERGETICS OF ETHIDIUM-DNA COMPLEX FORMATION
One class of substituents -- called ortho-para directors -- favors further substitutions mostly at the adjacent "ortho" carbon and at the "para" ring-site three carbons away.
Guide to Fluorine NMR for Organic Chemists provides a unique single source on both fluorine NMR and the impact of fluorine substituents on proton and carbon NMR spectra.
In this proposal, we aim to develop first applications for two, previously very little explored non-covalent interactions that are based on electrophilic halogen or chalcogen substituents ( halogen-bonds and chalcogen bonds ).
Hypothesis: The reaction conducted on benzaldehydes with electron-withdrawing substituents should result in a less pronounced shift towards the products of the secondary and tertiary Leuckart reactions.
Among the topics are computational approaches in agricultural research, the unique role of halogen substituents in designing crop protection compounds, new targets for fungicides, ecological modeling in pesticide risk assessment, and an enquiry-led approach to generating data for the safety evaluation of new pesticide active ingredients.
All these complexes contain alkyl substituents on the amido nitrogen.