Crystal structure of 3-methylamino-2,2-diphenyl-2H-azirine, (HNCH3)C2N(C6H5)2

Crystal structure of 2-oxo-2H-chromen-3-yl propano­ate

In the title compound, C12H10O4, the dihedral angle between the coumarin ring system [maximum deviation = 0.033 (8) Å] and the propionate side chain is 78.48 (8)°. In the crystal, weak C-H⋯O hydrogen bonds generate inversion dimers and and C-H⋯π and π-π inter-actions link the dimers into a three-dimensional network. A quantum chemical calculation is in good agreement with the observed structure.

Crystal structure of 3-amino-1,2,4-triazin-5(2H)-one.

because of various interesting biological activities.1 The tautomeric proton is highly effective at making strong intermolecular hydrogen binding with other heteroatoms of molecules involved with biological activity. The title compound 3-amino-1,2,4-triazin-5(2H)-one (6-azaisocytosine, Fig. 1), an isosteric isomer of isocytosine, can exist in several tautomeric forms, which have been discussed ...

Synthesis, solvatochromism and crystal structure of 5-Methoxy-5,6-diphenyl-4,5-dihydro-2H −1,2,4-triazine-3-thione

BACKGROUND For the development of properties in molecular crystals, such as electrical conductivities, magnetic properties, or non-linear optical properties, not only the electronic properties of molecules themselves matter, but also the molecular arrangements in the crystals are very important. Therefore, the design of the crystal structures and the control of molecular arrangements have attra...

Crystal structure of 10a-hy­droxy-9-(3-nitro­phen­yl)-3,6-diphenyl-3,4,5,6,7,8a,9,10a-octa­hydro-1H-xanthene-1,8(2H)-dione

In the octa-hydroxanthenedione unit of the title compound, C31H27NO6, the central di-hydro-pyran ring shows an envelope conformation, while the bilateral cyclo-hexene and cyclo-hexane rings adopt a half-boat conformation and a chair conformation, respectively. The nitro-benzene ring is twisted with respect to the two benzene rings, making dihedral angles of 63.1 (1) and 63.0 (1)°. In the crysta...

Cycloaddition of methyl 2-(2,6-dichorophenyl)-2H-azirine- 3-carboxylate to electron rich 2-azadienes