A 1H and 13C solid state NMR investigation of the structure and molecular dynamics of hydrogenated oligocyclopentadiene

The structure and dynamics of hydrogenated oligo(cyclopentadiene ne) (HOCP) was investigated by means of H-1 and C-13 NMR in the solid state. The C-13 NMR spectrum of HOCP is reported and interpreted for the first time here. Quantitative information on the distribution of the different structural and diastereoisomeric environments of the cyclopentane monomers was thus obtained. Moreover, the dynamic behavior of HOCP was investigated through the measurements of H-1 T-1 rho, and T-1, as well as C-13 T-1 relaxation times, highlighting the presence of two major motional processes, whose specific nature is discussed. Quantitative dynamic parameters were extracted by applying suitable theoretical models to the H-1 T-1 curve vs temperature.