Crossword clues for methylene
The Collaborative International Dictionary
Methylene \Meth"yl*ene\, n. [F. m['e]thyl[`e]ne, from Gr. ? wine + ? wood; -- a word coined to correspond to the name wood spirit.] (Chem.) A divalent hydrocarbon radical, -CH2-, not known in the free state, but regarded as an essential residue and component of certain derivatives of methane; as, methylene bromide, CH2Br2; -- formerly called also methene.
Methylene blue (Chem.), an artificial dyestuff consisting of a complex sulphur derivative of diphenyl amine; -- called also pure blue.
Douglas Harper's Etymology Dictionary
1835, from French méthylène (1834), coined by Jean-Baptiste-André Dumas (1800-1884) and Eugène-Melchior Péligot (1811-1890) from Greek methy "wine" (see mead (n.1)) + hyle "wood" + Greek name-forming element -ene. So called because detected in wood alcohol. "The breakdown of methylene into methyl and -ene, and the identification of the last syllable of methyl with the general suffix -ly, led to the use of meth- as a separate combining-element, as, for example, in methane, methacrylic" [Flood].
Wiktionary
n. 1 (context organic chemistry English) The divalent radical CH2< in which the free valencies are part of single bonds. 2 (context organic chemistry English) The same group, present as a repeating unit, in aliphatic compounds with names such as hexamethylenediamine. 3 (context organic chemistry English) The unstable carbene CH2:
WordNet
n. the bivalent radical CH2 derived from methane [syn: methylene group, methylene radical]
Wikipedia
In chemistry, methylene generally refers to a carbon atom bound to two atoms. It may mean:
- Methylene (compound) or (unsubstituted) carbene, :
- Methylene group or methylidene, a part of a molecule with formula =, connected to another atom by a double bond, as in "methylenecyclopropene"
- Methylene bridge or methanediyl, --, with the carbon connected to two distinct atoms, as in "methylene dichloride"
Methylene may also be:
- An obsolete name for methanol, .
- "Bichloride of methylene" (30% methanol and 70% chloroform), a variant of the old anesthetic A.C.E. mixture.
Methylene (systematically named methylidene, and dihydridocarbon), also called carbene is an organic compound with the chemical formula (also written ). It is a colourless gas that fluoresces in the mid-infrared range, and only persists in dilution, or as an adduct.
Methylene is the simplest carbene. It is usually detected only at very low pressures, very low temperatures, or as a short-lived intermediate in chemical reactions.
W. B. DeMore and S. W. Benson (1964), Preparation, properties, and reactivity of methylene. In Advances in Photochemistry, John Wiley & Sons, 453 pages. ISBN 0470133597
Usage examples of "methylene".
Such inks are made from a fine, cheap powder, of which nigrosine is used in making black inks, eosine for red, and methylene for blue ink, and they cost only a few dimes a gallon to manufacture.
These comprise most of the basic dyes, such as Thioflavine T, Safranine, Brilliant Green, Methyl Violet, Magenta, New Methylene Blue, Bismarck Brown, Rose Bengale, Phloxine, Acid Greens, Formyl Violet S 4 B, Rhodamine, Solid Blue, etc.
Can you tell me what happens to a person who paints himself with iodine and doses himself with mescal and methylene blue?
The little one reckoned that modification of eyesight was caused by molecules of methylene blue transported to the visual purple by iodine as a halogen in affinity, functioning as a carrier.