Abstract

Abstract13C spin‐lattice relaxation times (T1) were measured for resolved carbons in flexible‐chain molecules consisting of a hydrocarbon chain attached to benzophenone at the para position. Effective correlation times, teff, were determined from T1 data and used to discuss the motional features of these molecules as a function of chain length, chain unsaturation and type of linkage by which the chain is attached to the benzophenone moiety. Of particular interest is the finding that the overall motion and chain mobility are greatly affected by the introduction of an unsaturated bond in the chain, depending on its configuration and location in the hydrocarbon tail.

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