During catalytic reduction with hydrogen on nickel of a series of 3-substituted 1,5-dinitro-3-azabicyclo-[3.3. 1]non-6-enes alongside nitro groups reduction occurred also hydrogenation of the double bond. New diamines of the 3)-azabicyclo[3.3. I]nonane series were synthesized, and their structure was established by means of IR, H-1 and C-13 NMR spectroscopy and X-ray diffraction study.