In order to study the conformations of taurine in solution, H-1 NMR sp
ectra of taurine, taurocyamine and their methylderivatives were record
ed at different temperature and pH values. H-1 NMR spectra showed that
the rotation around the C-C single bonds is usually in part hindered
at room temperature and pH 7, and increases at higher temperature or a
t acidic pH values. At alkaline pH values the rotational mobility seem
s to be hindered. Only in taurocyamine molecule the rotation around th
e C-C bond appears mostly free.