The chair-boat energy difference in 1,3-dioxane

✍ Scribed by J.E. Anderson; F.G. Riddell; M.J.T. Robinson

• Book ID: 104223917
• Publisher: Elsevier Science
• Year: 1967
• Tongue: French
• Weight: 213 KB
• Volume: 8
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)90777-9

✦ Synopsis

There is continuing interest in the possibility of six membered rings existing in boat conformations, and the energy differences between boat and chair forms are of fundamental importance in conformational.analysis.

Recently the enthalpy difference between the boat and chair forms of 1,3-dioxane has been calculated to be 2.2 kcaljnole, 2 and, seemingly in agreement with this value, a boat conformation has been proposed for 4-methyl-4-t-butyl-1,3dioxane (I).'

Our reasons for doubting the validity of the calculations giving the value of 2.2 kcal/