Abstract
Δ1(6)-Dehydro-17-oxosparteinium perchlorate, [C15H23N2O]+·C10 −4 , is monoclinic:P21,a=8.620(1),b=14.406(2),c=6.825(1) Å, β=101.97(1)°,Z=2,V c=829.1(1)Å3,D x=1.52g cm−3, μ (Cukα)=21.7cm−1. The finalR was 0.051 for 1159 observed counterreflections. Carbon atoms C(3) and C(4) are highly disordered. This is probably due to conformational properties of the ringA, which are caused by the
group situated between ringsA andB. RingsB,C, andD have sofa, sofa, and chair conformations, respectively. The bond distances and valency angles of the quinolizidone moiety (ringsC andD) are in good agreement with those obtained previously for 17-oxosparteine (free base) and its perchlorate salt. The title compound was obtained from Δ5-dehydro-17-oxosparteine, the product of mercuric acetate dehydrogenation of 17-oxosparteine. From IR spectra in the condensed phase and13C-NMR measurements in DMSO-2H6 solution, it is evident that, in the crystalline state as well as in solution, the immoniumlactam molecular structure is present in the compound studied.
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Katrusiak, A., Kałuski, Z., Pietrzak, P. et al. Molecular and crystal structure of bis-quinolizidine immonium salts: I. Δ1(6)-dehydro-17-oxosparteinium perchlorate. Journal of Crystallographic and Spectroscopic Research 13, 151–163 (1983). https://doi.org/10.1007/BF01246584
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DOI: https://doi.org/10.1007/BF01246584