1,2,3-Triphenyl-1,2-dihydroquinoxaline

1,2,3-Triphenyl-1,2-dihydro­quinoxaline

The title compound, C(26)H(20)N(2), first reported in 1891, was obtained as a by-product in the preparation of benzildianil from benzil and excess aniline. The dihedral angles between the fused benzene ring and the pendant phenyl rings are 17.93 (11), 53.18 (10) and 89.08 (12)°.

Lophine (2,4,5-triphenyl-1H-imidazole)

The title compound, C(21)H(16)N(2), has been known since 1877. Although the crystal structure of 36 derivatives of lophine are known, the structure of parent compound has remained unknown until now. The three phenyl rings bonded to the imidazole core are not coplanar with the latter, with dihedral angles of 21.4 (3), 24.7 (3), and 39.0 (3)°, respectively, between the phenyl ring planes in the 2...

123 Editors

We present an adaptive mimetic finite difference method for the approximate solution of variational inequalities. The adaptive strategy is based on a heuristic hierarchical type error indicator. Numerical experiments that validate the performance of the adaptive MFD method are also presented. 1 The Obstacle Problem Throughout the paper we will use standard notations for Sobolev spaces, norms an...

Analysis 123

Ijprbs 123

Toxplasmosis is an important zoonotic disease caused by protozoan parasite Toxoplasma gondii. Transmission of the disease is mainly by ingestion of food or water contaminated with oocysts. Congenital toxoplasmosis occurs from the transplacental passage of from mother to fetus. Diagnosis of toxoplasmosis can be established by the direct detection of the parasite or serological methods. Among 150...