Carbon-13 NMR Studies of Solid Bisphenol-A Alkanoates.

Magic-angle spinning 13C spectra are reported for six bisphenol-A alkanoates, usually with cross-polarisation. These reveal effects arising from crystallographic non-equivalence, molecular motion (phenylene ring-flipping) and non-crystalline forms. The data are complemented by DSC and solution-state NMR measurements. Apparently inhomogeneous ring-flipping for some of the compounds is discussed