Quantum Molecular Dynamics in Liquid-Phase Stick NMR Spectra
Chapter
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Abstract
An account of the manifestations of the symmetrization postulate in liquid-phase spectra is given. Special attention is devoted to its consequences for transition metal polyhydride complexes in solution, for which anomalously large, apparent proton–proton couplings were reported. They were once recognized, not without astonishment, to be of the same origin as the rotational tunneling effects in solids. The representative experimental material will be discussed, and the question of the effective spin Hamiltonian will be readdressed. Finally, residual rotational tunneling effects observed in solution in strongly hindered methyl groups will be commented upon.
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