Definition of mesomerism in English:
mesomerism
noun mɪˈzɒmərɪz(ə)mmɪˈsɒmərɪz(ə)m-ˈzä-
Chemistry old-fashioned term for resonance
Example sentencesExamples
- He made contributions to the concept of resonance and mesomerism.
- Others illustrated mesomerism and steric hindrance, and one, drawn on the occasion of the award of the Chemical Society's Longstaff medal, shows the leading members of the Department at that time.
- In a preferred embodiment, the deactivation of the free electron pair of the nitrogen atom occurs by mesomerism and/or one or more electron-attracting and/or space-filling groups in the vicinity to the nitrogen atom.
- Scientists have discovered that benzene has got a very strong mesomerism.
- Increased colour value and build up properties were expected for the compounds now claimed, partly also in consequence of mesomerism experienced with similar groups.
Derivatives
adjective
Chemistry Mesomeric effects are much better transmitted through bonds than the inductive effect; in the C 3 position, the effect of the the carbonyl mesomeric influence is still noticeable.
Example sentencesExamples
- In this case the I effect of the halomethyl group is not exceeded by a positive mesomeric effect as for instance in case of methyl vinyl ether.
- The rearrangement of cross-conjugated mesomeric pyrimidines has been extensively studied.
- An indication of oxidation numbers or formal charge in Lewis structures and the resulting mesomeric structures is important in some branches of chemistry.
- Some problem arose at the alkylation of aromatic thiols substituted by substituent with positive mesomeric effect in the benzene ring and various copper heterogeneous catalysts at the same time.