methine group


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methine group

[′me‚thēn ′grüp]
(organic chemistry)
HC≡ A radical consisting of a single carbon and a single hydrogen. Also known as methenyl; methylidyne.
References in periodicals archive ?
All signals are broader and show shift to higher field, for example, methine group signal (C=CH) exhibited a shift from 6.
Icli, New Thiophene-Based Azo Ligands Containing Azo Methine Group in the Main Chain for the Determination of Copper(II) ions, Dyes Pigments.
Development of abnormal Fischer indolization of ortho-methoxyphenylhydrazone to provide a synthetic method for useful indole derivatives possessing an active methine group at C6 and novel 3,6'-biindole derivatives.
22 ppm corresponds to the methine group connecting with the ester bond (26), (27).
The methine group is represented by V3 (HV) and B3 (HB) at 67-77 ppm.
Occasionally conversion was also calculated by 1H NMR from the relative intensity of the methine group of the monomer and the polymer ([Delta][CH.
These radicals mainly contained two species, one resulting from H abstraction of methylene or methine groups formed a chain radical, and the other from radical addition of nitrile groups formed a polyimine radical [22].
Nippon Paint Company has been granted a patent for a coating film forming method comprised of step one of applying a curable coating on a substrate to be coated and step two including a stage of heating ahead of a stage of irradiating with ultraviolet ray, the curable coating comprising the curable coating comprised of a component having two or more active methylene and/or active methine groups, a component having two or more methacrylate and/or acrylate groups per one molecule, a Michael reaction catalyst and a photo-polymerizaton initiator.
In addition to the methylene, we now have methyl and methine groups present.
Unfortunately, methylene and methine groups, and especially the formers in the chains and cycles, cannot be distinguished by the NMR spectra.
On the other hand, the presence of apolar methylene and methine groups in the backbone and the ring conferring hydrophobic properties cause the opposite effect over the release process.