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The binuclear title complex, [Zn2(C22H28N3O)2(C3H9OSi)2], has a crystallographic imposed centre of symmetry. The ZnII atom is coordinated by three O and one N atom from one 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentyl­phenolate ligand and two bridging trimethyl­silanolate anions in a distorted tetra­hedral geometry. The dihedral angle between the benzotriazole ring system and the benzene ring is 19.83 (5)°. The tert-pentyl groups are disordered over two orientations with refined site-occupancy ratios of 0.858 (4):0.142 (4) and 0.665 (6):0.335 (6).

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In the mol­ecule of the title compound, C14H17NO2, the dihedral angle formed by the mean planes through the indan ring system and the amino­pentenone fragment is 83.26 (13)°. An intra­molecular N—H...O hydrogen bond is observed. In the crystal, mol­ecules are linked into one-dimensional chains extending along the [010] direction via O—H...O and C—H...O hydrogen bonds.

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In the title compound, C14H13NOS, the dihedral angle formed by the mean planes through the indane ring system and the thio­phene ring is 85.04 (11)°. The imine bond is located in the thio­phene plane [the S—C—C—N torsion angle is 0.00 (3)°] and an intra­molecular O—H...N hydrogen bond is observed.

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The asymmetric unit of the title hydrated salt, C18H40N4P+·Cl·2H2O, consists of two ionic mol­ecules and four water mol­ecules. The mol­ecular geometry around the penta­coordinate P atom is trigonal–bipyramidal, with a H atom and an apical N atom in axial positions and three N atoms with isobutyl substituents in equatorial positions. The Cl ions and water mol­ecules are connected via O—H...Cl hydrogen bonds, forming chains along [100]. The ethyl­ene bridging groups are disordered with refined site-occupancy ratios of 0.578 (9):0.422 (9).
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