[Contribution to the theoretical study of the nitrogen-nitrogen bond]

The electronic structures of eight molecules containing a nitrogen-nitrogen bond have been studied using a STO-3 G and a 7s3p basis set. Calculations were performed with the Gaussian-70 program. The nature of the N-N bond has been investigated through the calculations, for all the compounds. It appears that the N-N bond presents a double bond character in the dimers of nitroso compounds and a single one in N /sub 2/O/sub 4/.Francai