[摘要]：A series of planar tetracoordinate carbon mols. in cyclic semisatd. hydrocarbons resulting from the combination of the C52- skeleton with satd. hydrocarbon fragments is reported. The electronic stabilization and the bonding situation are studied through the analyses of MOs and the electron localization function. The magnetic properties are also revised, giving particular attention to the induced magnetic field. These systems are the first semisatd. cycles contg. a planar tetracoordinate carbon stabilized only by electronic factors.
