methylene group


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Related to methylene group: methylene radical
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Noun1.methylene group - the bivalent radical CH2 derived from methane
chemical group, radical, group - (chemistry) two or more atoms bound together as a single unit and forming part of a molecule
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The second goal of our work is to investigate the influence of chain length between the charges (one methylene group ZIC1 and five methylene groups ZIC5).
It is simply a condensation reaction between an aldehyde or a ketone and a compound containing an active methylene group.
7) For this reason, a suitable reactive diluent for air-drying alkyd paints should possess an allylic methylene group as a reactive site for efficient oxidative curing.
A wellknown catalysis mechanism includes the formation of a quinone methide intermediate and subsequent Michael type addition with the formation of a methylene group between aromatic rings [3].
Epoxy, urethane, aminoplast, unsaturated polyester, alkyd, silane/silicone, hybrid systems, active methylene group, etc.
1] which corresponds to terminal methylene group of the monomer clearly indicated the complete polymerization of vinyl group.
The determination of the methylene group distribution between chains and cycles in amorphous solids is a complicated problem and needs further research, especially the dipolar-dephasing behavior of the kerogen in the [sup.
A preferred adhesive has a first component comprising a PRF resin mixed with a methylene group donor hardener such as paraformaldehyde.
The two protons of methylene group attached to O-atom of ester were appeared at I' 4.
Therefore it is clear that the additional methylene group between the perfluoroalkyl chain and the methylenehydroxyl unit is responsible for the side reaction.

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