“…Campanelli et al [206] in their contribution describe advantages and limitations of gas-phase electron diffraction for determining molecular structure of five different benzene derivatives, 1,4-difluorobenzene, 1,3,5-trifluorobenzene, 1,4-dichlorobenzene, 1,3,5-trichlorobenzene, and silylbenzene. The report is rather unique, as it is only rarely possible that the analyses can be repeated independently by the same technique in two different laboratories.…”