107-80-2Relevant articles and documents
Topological scheme for empirical estimation of13C NMR chemical shifts in polybromoalkanes
Dostavalova,Vasil'eva,Velichko
, p. 2494 - 2500 (1989)
1. For the first time, an empirical scheme has been proposed for estimating the chemical shift of carbon atoms in polybromoalkanes (including bromomethanes) with an error of ±1 ppm - a scheme based on the simplest topological indicators of a molecular graph and readily accessible algorithmization. 2. It has been shown that the plane graph model gives the best agreement between calculated and experimental values of the chemical shift of carbon atoms in the case of polysubstituted alkanes with a large number of equally probably conformations.
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Deno,N.C. et al.
, p. 3700 - 3703 (1970)
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Peterson,P.E.,Boron,W.F.
, p. 4076 - 4077 (1971)
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General Synthesis of Methyl- and Dimethyl-cyclobutanes from Simple 1,3-Diols by Phase Transfer Catalysis
Toeroek, Bela,Molnar, Arpad
, p. 801 - 804 (2007/10/02)
A general method is described for the preparation of methyl- and dimethyl-cyclobutanes from simple 1,3-diols.The key steps of the procedure are a phase transfer catalysed ring closure and the transformation of a carboxyl group to a methyl group.Phase transfer catalysis provides good yields in the synthesis of the cyclobutane skeleton.
A reinvestigation of the vapor phase bromination of 2-bromobutane
Tanner, Dennis D.,Ruo, Tomoki C. S.,Kosugi, Yoshio,Potter, Alan
, p. 2310 - 2316 (2007/10/02)
The soltuion phase photobromination of 2-bromobutane yields 2,2-dibromobutane, meso-2,3-dibromobutane, dl-2,3-dibromo-dibromobutane, small amounts of 1,2-dibromobutane, and 2,2,3-tribromobutane.However, in the corresponding vapor phase bromination these products appear along with other polybrominated products.The yield of these polybromides increases with temperature.The increase in yield of the polyhalogenated materials is rationalized by considering the thermal instabilty of the β-bromoalkyl radical, which eliminates a bromine atom to form the corresponding alkene.It is demonstrated that in the vapor phase allylic bromination competes succesfully with bromine addition.Reaction schemes are suggested to explain the formation of polybromides.An explanation is also offered for the dicrepancy between these results and those of previously reported vapor phase work.
