The synthesis of 3, 7-diallyl-3, 7-diazabicyclo [3.3. 1] nonane (C7H12N2allyl2, 3) has been revisited, and several hitherto undetected byproducts have been identified. Pure 3 and these byproducts were isolated by both prep-GC and column chromatography. Monoprotonated 3 in the form of the PF6 salt [(C7H13N2allyl2] PF6 (9) and the addition complexes of 3 to Ni (acac) 2 and CuI,(C7H12N2allyl2) Ni (acac) 2 (10) and {(C7H12N2allyl2) Cu (μ-I)} 2 (11), ...