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Substituenteneffekte auf die C – C‐Bindungsstärke, 11. Thermolyse von Tetraalkylpinacoldimethylethern
Author(s) -
Birkhofer Hermann,
Beckhaus HansDieter,
Rüchardt Christoph
Publication year - 1993
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19931260424
Subject(s) - chemistry , thermal decomposition , radical , enthalpy , alkyl , medicinal chemistry , decomposition , standard enthalpy of formation , kinetics , polymer chemistry , organic chemistry , quantum mechanics , physics
Effects of Substituents on the Strength of CC Bonds, 11 [1] . – Thermolysis of Tetraalkylpinacol Dimethyl Ethers The products and the kinetics of the thermolysis reaction of the pinacol dimethyl ethers 1a‐1f have been studied. A linear correlation between Δ ≢ (300°C) of thermolysis and the strain enthalpies H s of 1 , or its release D s during the dissoziation into radicals 2 , is observed. From this correlation a stabilization enthalpy H R 2.1 ± 0.5 kcal/mol is deduced for α1‐methoxy‐alkyl radicals 2 as compared to tert 1‐alkyl radicals.