different between methyl vs hexamethyl
methyl
English
Etymology
Borrowed from German Methyl; compare the French méthyle.
French chemists Jean-Baptiste Dumas and Eugene Peligot, after determining methanol's chemical structure, introduced "methylene" from the Ancient Greek ???? (méthu, “wine”) + ??? (húl?, “wood, material”) with the intention of highlighting its origins, "alcohol made from wood (substance)". The term "methyl" was derived in about 1840 by back-formation from "methylene", and was then applied to describe "methyl alcohol".
Pronunciation
- (Received Pronunciation) enPR: m??th?l, IPA(key): /?m??a?l/, /?m???l/, /?mi??a?l/, /?mi???l/
- (US, Canada) IPA(key): /?m???l/
- Rhymes: -???l
Noun
methyl (plural methyls)
- (organic chemistry) The univalent hydrocarbon radical, CH3-, formally derived from methane by the loss of a hydrogen atom; a compound or part of a compound formed by the attachment of such a radical.
- 1973, Robert E. Cornish, Vitamin and Mineral Deficiencies, page 119,
- You might point out in the theory of oxidation of oils, in development of rancidity in oils, that many methyls accelerate this oxidation of oils. I do not want to burden you with a lecture on chemistry but there are some methyls like iron which has both a valence of two and of three. Another example is cobalt which has a valence of both two and three.
- 2003, Russell Timkovich, 73: The Family of d-Type Hemes: Tetrapyrroles with Unusual Substituents, Karl M. Kadish, Kevin M. Smith, Roger Guilard (editors), The Porphyrin Handbook, Volume 12: The Iron and Cobalt Pigments: Biosynthesis, Structure and Degradation, page 134,
- The southern acetates must be decarboxylated to methyls.
- 2005, Bruce A. Hathaway, Organic Chemistry the Easy Way, page 38,
- The most stable form has the groups staggered and the methyls as far from each other as possible (DA[dihedral angle] = 180°).
- 1973, Robert E. Cornish, Vitamin and Mineral Deficiencies, page 119,
Derived terms
Translations
Dutch
Etymology
From meth- +? -yl.
Pronunciation
- IPA(key): /me??til/
- Hyphenation: me?thyl
Noun
methyl n (uncountable)
- (organic chemistry) methyl
methyl From the web:
- what methylphenidate
- what methylprednisolone
- what methylphenidate used for
- what methylprednisolone used for
- what methylates dna
- what methylprednisolone does
- what methylation
- what methyl salicylate
hexamethyl
English
Etymology
From hexa- +? methyl
Noun
hexamethyl (uncountable)
- (organic chemistry) (in combination) six methyl groups in a molecule
hexamethyl From the web:
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