Latest documents http://publikationen.ub.uni-frankfurt.de/index/index/ Mon, 20 Jun 2011 10:10:29 +0200 Mon, 20 Jun 2011 10:10:29 +0200 http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/21906 The dihydro­pyrimidine ring of the title compound, C13H15ClN2S, adopts an envelope conformation with five almost coplanar atoms (r.m.s. deviation = 0.054 Å) and the C atom bearing the two methyl substituents deviating from this plane by 0.441 (2) Å. The best plane through the five almost coplanar atoms forms a dihedral angle of 89.56 (5)° with the benzene ring. The crystal packing is characterized by centrosymmetric dimers connected by pairs of N—H ... S hydrogen bonds. Aamer Saeed; Michael Bolte article http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/21906 Mon, 20 Jun 2011 10:10:29 +0200 http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/21905 The mol­ecular conformation of the title compound, C16H22N4O2S2, is stabilized by two intramolecular N—H ... O hydrogen bonds. The crystal packing shows N—H ... O and N—H ... S hydrogen bonds. Aamer Saeed; Naeem Abbas; Hummera Rafique; Michael Bolte article http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/21905 Mon, 20 Jun 2011 10:05:22 +0200 http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/21899 In the title compound, C19H14O, the dihedral angle between the two aromatic rings of the biphenyl residue is 8.0 (3)° and the dihedral angle between the two rings connected by the carbonyl C atom is 51.74 (18)°. There are no short C—H ... O contacts in the crystal structure. Aamer Saeed; Shahid Ameen Samra; Madiha Irfan; Michael Bolte article http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/21899 Mon, 20 Jun 2011 09:44:45 +0200 http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/21890 The two rings in the title compound, C11H12N2O4S, are roughly coplanar [dihedral angle = 6.77 (8)°]. Whereas the two outer methyl groups of the three meth­oxy groups are almost coplanar with the aromatic ring to which they are attached [C—C—O—C torsion angles = 8.5 (3) and -8.3 (3)°], the methyl group of the central meth­oxy substituent is not [C—C—C—C = -78.4 (3)°]. The crystal packing is stabilized by N—H ... O hydrogen bonding. Aamer Saeed; Muhammad Akram; Abdul Rauf; Michael Bolte article http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/21890 Fri, 17 Jun 2011 16:56:52 +0200 http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/21888 The central structural element of the title compound, C24H29NO2, is a carbazole unit substituted with two acetyl residues and an octyl chain. The acetyl residues are nearly coplanar [dihedral angles = 5.37 (14) and 1.0 (3)°] with the carbazole unit which is essentially planar (r.m.s. deviation for all non-H atoms = 0.025 Å). The octyl chain adopts an all-trans conformation. The crystal packing is stabilized by C—H ... O hydrogen bonds. Aamer Saeed; Madiha Kazmi; Shahid Ameen Samra; Madiha Irfan; Michael Bolte article http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/21888 Fri, 17 Jun 2011 16:28:26 +0200