The preparations and reactions of several 2,2′-disubstitutedoctafluorobiphenyls and heterocyclic organometallic derivatives of Group IV elements and titanium are described. Some evidence is given for the organometallic titanium intermediate postulated in the coupling reaction for the syntheses of polyfluorobiphenyls.
An organic electroluminescent device, which has, between a pair of electrodes, at least one organic layer including a light-emitting layer, in which the organic layer contains a specific tetraphenylene compound, and in which the light-emitting layer contains a phosphorescent material; and a specific tetraphenylene compound that can be used in the device.