From the electronic point of view, graphite is a semi metal, the density of the charge carriers is approximately 10^-4 by carbon atom. Insertion in the graphite of made up donors of electrons, is accompanied by a strong increase in conductivity in the plan and along the axis c. Reaction of the sodium hydride with the graphite led to the formation of ternary hydrogenated compounds of different stages. The electronic paramagnetic resonance applied to these compounds indicates the conducting character of these species.