Methylene meaning

mĕthə-lēn
A bivalent hydrocarbon group, CH2 , a component of unsaturated hydrocarbons.
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The divalent hydrocarbon radical CH2, normally existing only in combination.
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A bivalent hydrocarbon radical, CH2 . Because it has two unshared electrons, it is extremely reactive and occurs only as an intermediate byproduct in chemical reactions. Methylene is a component of unsaturated hydrocarbons.
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(organic chemistry) The divalent radical CH2< in which the free valencies are part of single bonds.
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(organic chemistry) The same group, present as a repeating unit, in aliphatic compounds with names such as hexamethylenediamine.
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(organic chemistry) The unstable carbene CH2.
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Origin of methylene

  • French méthylène Greek methu wine medhu- in Indo-European roots Greek hūlē wood, substance

    From American Heritage Dictionary of the English Language, 5th Edition

  • French méthylène, from Ancient Greek μέθυ (methy, “wine") + ὕλη (hylÄ“, “wood").

    From Wiktionary