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3 Polish Journal of Chemistry

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Synthesis and Crystal Structure of Hydrogenated Pyrazino[2,1-a]isoquinoline Derivatives

Zawadzka A., Leniewski A., Maurin J. K., Wojtasiewicz K., Siwicka A., Czarnocki Z.

Polish Journal of Chemistry

2003

Vol. 77 / nr 5

565-576

Areview of the experimental as well as of the theoretical studies, performed on the area of the infrared spectroscopy of hydrogen bonded molecular crystals, is given. Discussion of some physical phenomena is presented, responsible for basic spectral effects registered in the infrared spectra, as breaking of vibrational dipole selection rules in the IR spectra, linear dichroic as well as temperature effects, observed in the frequency range of the proton stretching vibrations. Also some newly recognized H/D isotopic effects for hydrogen bonded systems are presented, deduced from a quantitative analysis of the polarized spectra in the IR, namely the so called isotopic "self-organization" effects and the "long-range" H/D isotopic effects.

Reaction of phenyllithium with N-pivaloyl-20-piperidone

Maurin J.K., Czarnocki Z., Burdach A.

Polish Journal of Chemistry

1998

Vol. 72, nr 5

940-948

Structural features of the reaction of N-pivaloyl-2-piperidone with phenyllithium were elaborated. Two compounds (4) and (5) were obtained and their structures were established by X-ray analysis. C16H23NO2(4): monoclinic, C2/c, a=37,197(7), b=8.479(2), c=9.988(2) A, beta=96.5(3)degree, Z=8; C22H27NO (5): orthorhombic, P2-12-12-1, a=8.244(2), b=10.305(2), c=22.616(5) A, Z=4.

Oxime-carboxyl hydrogen bonds: the preferred interaction determining crystal packing. II. Crystal structure of 5beta-Cholanic acid 3-oxime

Maurin J.K.

Polish Journal of Chemistry

1998

Vol. 72, nr 4

786-792

Beta-Cholanic acid oxime, C24H39NO3, M(r)=389.56, hexagonal, P6(5), a=b=14.564(3)A, c=20.282(5)A, alpha=beta=90 degree, gamma=120 degree, V=3725.7(14)A(3), Z=6. Crystal structure is composed from infinite hydrogen bonded chains of molecules forming bihelical arrangements along sixfold screw axes. Oxime-carboxyl hydrogen bonds are observed. Structure is both chiral and polar.