Monte Carlo dynamics study of motions in c i s-unsaturated hydrocarbon chains

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Abstract
A Monte Carlo dynamics study of the motions of hydrocarbon chains containing c i s double bonds is presented. The simulations utilize the high‐coordination {2 1 0} lattice for the simultaneous representation of the tetrahedrally bonded carbon atoms and the planar unsaturated segment. Results on single chains undergoing free motion in space and tethered to an impenetrable planar interface are reported. The introduction of a c i s double bond into a hydrocarbon chain induces a slowdown in the dynamics. The simulations show this to be a universal result independent of the representation of the chain on the lattice. In contrast, polyunsaturated chains are found to be more mobile than saturated ones.