- Effects of Substituents on the Strength of C-C Bonds, 11. - Thermolysis of Tetraalkylpinacol Dimethyl Ethers
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The products and the kinetics of the thermolysis reaction of the pinacol dimethyl ethers 1a-1f have been studied.A linear correlation between ΔG(excit.) (300 deg C) of thermolysis and the strain enthalpies HS of 1, or its release DS during dissociation into radicals 2, is observed.From this correlation a stabilization enthalpy HR = 2.1 +/- 0.5 kcal/mol is deduced for α-methoxyalkyl radicals 2 as compared to tert-alkyl radicals.Key Words: 1,2-Dialkoxyethanes, tetraalkyl- / Strain and structure / Thermolysis, kinetics of / Radicals, stability of
- Birkhofer, Hermann,Beckhaus, Hans-Dieter,Ruechardt, Christoph
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p. 1023 - 1030
(2007/10/02)
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- Effects of Substituents on the Strength of C-C Bonds, 8. - Heats of Formation and Strain of 1,1,2,2-Tetraethylethylene Glycol Dimethyl Ether and D,L-1,2-Dimethyl-1,2-diphenylethylene Glycol Dimethyl Ether
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The heats of combustion of the titel compounds 1 and 2 were measured calorimetrically with the result (kcal mol-1, s.d. in parentheses)ΔHc0 = -1880.1 (+/-0.6) and -2373.3 (+/-1.4).The heat of vaporisation of 1 ΔHv/su
- Dogan, Barbara,Beckhaus, Hans-Dieter,Birkhofer, Hermann,Ruechardt, Christoph
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p. 1365 - 1368
(2007/10/02)
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