Substituenteneffekte auf die C – C‐Bindungsstärke, 11. Thermolyse von Tetraalkylpinacoldimethylethern

Effects of Substituents on the Strength of CC 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 Hs of 1, or its release Ds during the dissoziation into radicals 2, is observed. From this correlation a stabilization enthalpy HR2.1 ± 0.5 kcal/mol is deduced for α1‐methoxy‐alkyl radicals 2 as compared to tert1‐alkyl radicals.