The solution thermochemistry at 25 °C of [graphic omitted], RB(OEt)2, [graphic omitted] [R = Ph or Bun, n= 2, 3, or 4] is described. Appropriate enthalpies of transition are determined and cyclic strain energies of the heterocycles are estimated. The influence of steric and electronic effects on these strain energies is discussed.
A. Finch, P. J. Gardner, P. M. McNamara and G. R. Wellum, J. Chem. Soc. A, 1970, 3339 DOI: 10.1039/J19700003339
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