Ueber αα′-Diphenyl-Pyridin und -Piperidin

2,2-Diphenyl-4-(piperidin-1-yl)butanamide

In the title compound, C(21)H(26)N(2)O, the dihedral angle between the mean planes of the two benzene rings is 81.1 (9)°. The piperidine ring is in a chair conformation. The crystal packing is stabilized by N-H⋯N and N-H⋯O hydrogen bonds and weak inter-molecular C-H⋯O inter-actions.

Diphenyl(pyridin-2-yl)­phosphane selenide

In the title compound, C(17)H(14)NPSe, the P atom has a distorted tetra-hedral environment resulting in an effective cone angle of 163°. In the crystal, C-H⋯Se/N/π inter-actions are observed.

untersuchung ueber biologie und die empfindlich- keit von eulecanium coryli l. gegen ueber insekt- iziden

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Ueber die Wirkung des neuen Tuberkulins TR auf Gewebe und Tuberkelbacillen

[(4E)-1-Methyl-2,6-diphenyl-3-(propan-2-yl)piperidin-4-yl­idene]amino 3-methyl­benzoate

In the title compound, C29H32N2O2, the piperidine ring exists in a chair conformation (the bond-angle sum at the sp (2)-hybridized C atom is 359.79°). The phenyl rings and the methyl group substituted on the heterocyclic ring are in equatorial orientations. In the crystal, pairs of C-H⋯π inter-actions result in the formation of inversion dimers.