1,1′-Methyl­enebis[3-(2,6-diiso­propyl­phen­yl)-3,4,5,6-tetra­hydro­pyrimidin-1-ium] dibromide ethanol monosolvate monohydrate

In the title methyl­ene-bridged di(tetra­hydro­pyrimidinium) salt, C₃₃H₅₀N₄²⁺·2Br⁻·C₂H₅OH·H₂O, the two tetra­hydro­pyrimidinium rings have envelope conformations with the central CH₂ C atom as the flap. Their mean planes are inclined to one another by 73.31 (13)° and the attached benzene rings are inclined to one another by 67.39 (15)°. The methylene-C—N bond lengths in the tetra­hydro­pyrimidinium rings are 1.314 (3) and 1.304 (3) Å, values typical for C=N double bonds. The distances between the methyl­ene-bridge C atom and the linked tetra­hydro­pyrimidinium N atom are 1.457 (3) and 1.465 (3) Å, values typical for C—N single bonds. The mol­ecules co-crystallized with H₂O and EtOH mol­ecules from the solvent. In the crystal, there is a zigzag chain along [010] of water mol­ecules linked by one of the Br⁻ anions via O—H...Br hydrogen bonds. The second Br⁻ anion is hydrogen bonded (O—H...Br) to the ethanol solvent mol­ecule. There are also a number of C—H...Br and C—H...O hydrogen bonds present, leading to the formation of a two-dimensional network lying parallel to the bc plane.

2-[2-(5-Bromo­thio­phen-2-yl)-4,5-diphenyl-1H-imidazol-1-yl]-3-phenyl­propan-1-ol

In the title compound, C₂₈H₂₃BrN₂OS, the dihedral angles formed by the imidazole ring with the 5-bromo­thio­phenyl and phenyl rings are 76.90 (8), 34.02 (10) and 80.93 (11)°, respectively. The chiral centre maintains the S configuration of the L-phenyl­alaninol starting material. In the crystal, mol­ecules are linked by O—H...N hydrogen bonds, forming chains running parallel to the a-axis direction.

(S)-4,5-Diphenyl-1-[1-phenyl-3-(phenyl­sulfan­yl)propan-2-yl]-2-(thio­phen-2-yl)-1H-imidazole

In the title compound, C₃₄H₂₈N₂S₂, the central imidazole ring (r.m.s. deviation = 0.0015 Å) forms dihedral angles of 55.7 (3), 17.94 (11) and 86.27 (11)°, respectively, with the mean planes of the attached thienyl and two phenyl substituents. The thienyl ring shows ring-flip disorder [occupancy ratio = 0.647 (2):0.353 (2)]. The chiral centre maintains the S configuration of the L-phenyl­alaninol starting material. Intra- and inter­molecular C—H...S hydrogen bonds involving the disordered thienyl ring are observed.