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1.  2-[(2,6-Diisopropyl­phen­yl)imino­meth­yl]-4-iodo­phenol 
The asymmetric unit of title compound, C19H22INO, contains two independent mol­ecules. Classical intra­molecular O—H⋯N hydrogen bonds stabilize the mol­ecular structures. The crystal structure is stabilized by weak inter­molecular C—H⋯π and π–π [centroid–centroid = 3.8622 (18) Å] inter­actions. In both mol­ecules, the aromatic rings are nearly perpendicular to each other [dihedral angles = 84.26 (17) and 86.69 (15)°].
doi:10.1107/S1600536812023653
PMCID: PMC3379471  PMID: 22719669
2.  (E)-4-Bromo-2-[(2,6-diisopropyl­phen­yl)imino­meth­yl]phenol 
In the title compound, C19H22BrNO, the dihedral angle between the benzene rings is 76.17 (14)° and an intra­molecular O—H⋯N hydrogen bond with an S(6) graph-set motif is present. One methyl group is disordered over two sets of sites with site occupancies of 0.66 (3) and 0.34 (3). A weak inter­molecular C—H⋯π inter­action is observed in the crystal structure.
doi:10.1107/S1600536812021605
PMCID: PMC3379361  PMID: 22719559
3.  4-Chloro-2-[(2,6-diisopropyl­phen­yl)imino­meth­yl]phenol 
The asymmetric unit of the title compound, C19H22ClNO, contains two independent mol­ecules in which the dihedral angles between the aromatic rings are 76.45 (9) and 74.69 (9)°. An intra­molecular O—H⋯N hydrogen bond occurs in each mol­ecule. The crystal structure features weak C—H⋯π inter­actions.
doi:10.1107/S1600536812020612
PMCID: PMC3379312  PMID: 22719510
4.  Di­hydrogen phosphate mediated supra­molecular frameworks in 2- and 4-chloro­anilinium dihydrogen phosphate salts 
The title compounds, 2-chloro­anilinium dihydrogen phosphate (2CADHP) and 4-chloro­anilinium di­hydrogen phosphate (4CADHP), both C6H7NCl+·H2PO4 −, form two-dimensional supra­molecular organic–inorganic hybrid frameworks. In 2CADHP, the dihydrogen phosphate anions form a double-stranded anionic chain generated parallel to the [010] direction through O—H⋯O hydrogen bonds, whereas in 4CADHP they form a two-dimensional supra­molecular net extending parallel to the crystallographic (001) plane into which the cations are linked through strong N—H⋯O hydrogen bonds.
doi:10.1107/S0108270110001940
PMCID: PMC2855582  PMID: 20203405
5.  10-[2-(Dimethyl­amino)eth­yl]-9-(4-methoxy­phen­yl)-3,3,6,6-tetra­methyl-3,4,6,7,9,10-hexa­hydro­acridine-1,8(2H,5H)-dione 
In the title compound, C28H38N2O3, the central ring of the acridinedione system adopts a boat conformation, while one of the outer rings adopts a half-chair conformation and the conformation of the other outer ring is between a sofa and a half-chair. The acridinedione system is buckled, with an angle of 22.01 (3)°. The crystal packing comprises layers of mol­ecules laid parallel to the ac plane, being reinforced by an intermolecular C—H⋯O interaction.
doi:10.1107/S1600536808043882
PMCID: PMC2968240  PMID: 21581885

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