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8591252 
Journal Article 
The Preparation and Some of the Properties of Diboron Tetrachloride, B2Cl4 
Urry, G; Wartik, T; Moore, RE; Schlesinger, HI 
1954 
Yes 
Journal of the American Chemical Society
ISSN: 0002-7863
EISSN: 1520-5126 
76 
21 
5293-5298 
English 
The latest procedure for preparing diboron tetrachloride, B2Cl4, is described as are the physical properties and the chemical behavior of the compound. It absorbs hydrogen rapidly at room temperature, forming diborane and boron trichloride. The chlorine atoms of the compound may be replaced by bromine, by alkoxy and dimethylamino groups, but not by methyl radicals. It forms a dietherate stable in excess ether, and a monoetherate which loses ethyl chloride at room temperature. At low temperatures in ether solution it adds one mole of diborane to form an unstable compound the behavior of which is described. With trimethylamine it forms a stable compound having the molecular formula [B2Cl4 N(CH3)3]4. Hydrogenation of diboron tetrachloride by treatment with lithium borohydride or with aluminum borohydride results in the formation of diborane and tetraborane together with smaller amounts of pentaborane (B5H9), and decaborane. The relative amounts of the boranes obtained depend on the temperature and other conditi ns under which the reaction is carried out. © 1954, American Chemical Society. All rights reserved.