Crystal and molecular structure of 15-oxosparteine-N(1)-oxide perchlorate

[C₁₅H₂₅N₂O₂⁺·ClO₄^–,M_r=364.83, is monoclinic:P2₁,a=7.885(1),b=10.685(1),c=10.658(1) Å,=105.63(1)°,V_c=864.8(2) ų,Z=2,D_x=1.39(1)g cm^–3, (CuK)=1.54178 Å,(CuK)=21.4 cm^–1,F(000)=388 e,T=292K,R=0.066 for 1205 unique reflections. The piperidine ringsA, B, C, andD have chair, chair, boat, and half-chair conformations, respectively. The quinolizidine system (ringsA/B) has atrans configuration. The cations are interconnected by a hydrogen bond O(N1)O(C15) of 2.552(10) Å into chains along [010]. Atoms C(12) and C(13) from ringD of the cation are disordered. Very high thermal parameters of the oxygen atoms of the perchlorate anion may indicate its orientational disorder.