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Topic: Methoxymethane

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	Aflatoxin
		A method is described for removal of aflatoxin from groundnuts by extraction with methoxymethane (dimethylether) at room temperature in an autoclave or in pressure-tight columns.
		Contaminated groundnuts are pulverized to pass through a 12 mesh screen, and extracted in stainless steel columns at approximately 6 kg/cm pressure.
		The extract can be used for preparation of groundnut oil, as aflatoxin is inactivated during refining, and methoxymethane is easily removed from the defatted product because of its low boiling point.
	www.aflatoxin.info /lit_res.asp?s=904 (138 words)

	intermolecular bonding - hydrogen bonds
		In methoxymethane, the lone pairs on the oxygen are still there, but the hydrogens aren't sufficiently
		Except in some rather unusual cases, the hydrogen atom has to be attached directly to the very electronegative element for hydrogen bonding to occur.
		The boiling points of ethanol and methoxymethane show the dramatic effect that the hydrogen bonding has on the stickiness of the ethanol molecules:
	www.chemguide.co.uk /atoms/bonding/hbond.html (1180 words)

	Intermolecular Forces
		methoxymethane (dimethyl ether), CH 1,2-ethanediol, OH-CH ethanol, CH ethane, CH Intermolecular Forces - Answers
		All group 17 elements (the halogens) have the same valence electron configuration and exhibit the same type of bonding.
		The C-O bonds of methoxymethane (dimethyl ether) (CH) are polar.
	firstyear.chem.usyd.edu.au /Questions/IntermolecularForces.htm (1108 words)

	Creative Chemistry Interactive Molecular Models - Functional Isomers
		There are two functional group isomers of which you need to be aware:
		I have put models of the functional isomers ethanol and methoxymethane, and propanal and propanone here.
		These are typical of the sort of molecules you meet at AS/A Level.
	www.creative-chemistry.org.uk /molecules/functional.htm (188 words)

	Model of Ethanol and Methoxymethane
		Differences in connectivity can lead to huge differences in physical and chemical properties, as in this case, where the functional group changes.
		Ethanol is a liquid at room temperature, boiling at 78 ºC, and is chemically quite reactive, whereas methoxymethane is a gas at room temperature, boiling at -24 ºC, and is chemically less reactive than ethanol.
		To rotate: press left mouse button on molecule and drag
	wps.prenhall.com /wps/media/objects/724/741957/constitutional1.html (96 words)

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