substituent

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substituent

[səb′stich·ə·wənt]
(organic chemistry)
An atom or functional group substituted for another in a chemical structure.
References in periodicals archive ?
The half-lives of the higher BDEs increased with decreasing number of bromine substituents (Table 3).
In this case all 8 of the NH urea substituents are oriented towards a single anion, which likely explains the extremely high binding constants observed with this receptor.
Although the interactions of ethidium with DNA have been well characterized, many questions remain regarding the role that the amino substituents (located at positions 3 and 8 on the phenanthridine ring) play in the intercalative binding process.
In a similar way, these units then turn on or off the two output units, which respectively represent ortho-para-directing or meta-directing first substituents.
Compounds and substituents with fluorine directly bound to heteroatoms
In contrast to halogen-bonds, chalcogen-bonds feature two substituents on the interacting atom as well as two electrophilic axes.
Conclusions: Electron-withdrawing substituents reduced the shift towards the products of the secondary and tertiary Leuckart reactions.
Zirconium complex 3d with ortho-dimelhyl sub-stituents on the N-aryl ligand showed higher activity than the complex 3b with ortho-diisopvopy1 substituents.
A series of diacid ezatiostat analogs bearing different substituents on the cysteinyl sulfur were synthesized using computer aided drug design and TRAP, a proprietary drug discovery technology, to improve the inhibitory potency and selectivity for the target enzyme GST P1-1.
FORMULA NOT REPRODUCIBLE IN ASCII] Compound Substituents [R.
The poor processibility for many polymers requires the introduction of solubilizing substituents, which can further complicate the synthesis.