The stability of the complexes AgBF4•2 vinyl chloride and AgBF4•2 vinyl fluoride has been determined and compared with that of AgBF4•2 propylene. The much lower stability of the halo-olefin complexes has been attributed partly to weaker interaction of these less basic olefins with the silver ion and partly to configurational restrictions imposed upon the complexed halo-olefin molecules as a result of their higher permanent dipole moment.
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Quinn et al. (1971) studied this question.