The Influence of Polytypic Structures on the Solid-state 13C NMR Spectra of n-Alkanes

Two polytypes for the monoclinic (M 0 1 1 ) modification of n-hexatriacontane (n-C 3 6 H 7 4 ), single-layered structure Mon and double-layered structure Orth II, were studied by means of the solid-state CP/MAS 1 3 CNMR spectroscopy. The terminal methyl carbon showed clear differences in the chemical shift as well as spin-lattice relaxation time (T 1 ) between Mon and Orth II, in contrast to no marked difference for the other carbons.