The crystal structure of C.I. Pigment Red 2, 1′-(2,5-dichlorophenyl)azo-2′hydroxy-3′-phenylamidonaphthalene
Abstract
The crystal and molecular structure of C.I. Pigment Red 2, l′-(2,5-dichlorophenyl)azo-2′-hydroxy-3′-phenylamidonaphthalene has been determined by x-ray diffraction techniques. It crystallizes in the monoclinic system with cell parameters a = 10.309 ± 0.006 Å, b = 9.051 ± 0.003 Å c = 21.991 ± 0.015 Å, β = 104.33 ± 0.10°. The space group is P21/c and there are four molecules per unit cell. The structure was solved using direct methods and least-squares refinement has been completed on three-dimensional data with θ less than 35° (CnKα radiation).
The hydrogen atoms have been found and included but not refined. The final residual is 15.3%. The molecule is probably in the form of the hydrazone tautomer. The intramolecular hydrogen bonds keep most of the molecule approximately planar while it appears that the remainder is held in the same plane due to steric hinderence between the molecules. The molecules are packed in columns with alternate molecules antiparallel and are linked by van der Waals forces.
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Artikel in diesem Heft
- A rapid way of refining by the method of least squares
- The crystal structure of C.I. Pigment Red 2, 1′-(2,5-dichlorophenyl)azo-2′hydroxy-3′-phenylamidonaphthalene
- An orthrohombic superstructure of tridymite existing between about 105 and 180°C
- Hydroxyl orientations in Sr(OH)2, an example of a hydrogen atom coordinating a cation
- Crystal structure of LiH2PO4, structural topology and hydrogen bonding in the alkaline dihydrogen orthophosphates
- The crystal structure of diamminesilver dinitroargentate, [Ag(NH3)2]Ag(NO2)2*
- A neutron-diffraction study of hemimorphite
- Die Kristallstruktur der Verbindung K4SrGe3O9, ein Cyclogermanat mit Zwölferringen
- Die Kristallstruktur des Rubidium-TrihydrogenDiphthalat-Dihydrats, RbH3(C8O4H4)2 · 2H2O
- Hydrogen bonding and cation ordering in Magnet Cove pectolite
- Die Kristallstruktur der Verbindung K4BaGe3O9
- Point symmetry, electrogyration, and quadratic electrooptic effects of cubic Sr(NO3)2, Ba(NO3)2, and Pb(NO3)2
- Piezooptic and quadratic electrooptic effects in cubic potassium cyanide
- Crystallographic data of pimaricin and rimocidin crystals, two polyene macrolide antifungal antibiotics
- Crystal data on amino acids salts containing anions of the type MeX62−
- Preliminary crystal data on hexabromoselenates(IV) of some amino acids
- Crystallographic data of hexaiodotellurates(IV) of some amino acids
- Single-crystal data of nickel chelate of 4,4′dihydroxy-3,3′-dibenzoyl biphenyl
- Space group and unit-cell dimensions of 1:1 adduct of bis(diphenyldithiophosphinato)cobalt(II) and α picoline
Artikel in diesem Heft
- A rapid way of refining by the method of least squares
- The crystal structure of C.I. Pigment Red 2, 1′-(2,5-dichlorophenyl)azo-2′hydroxy-3′-phenylamidonaphthalene
- An orthrohombic superstructure of tridymite existing between about 105 and 180°C
- Hydroxyl orientations in Sr(OH)2, an example of a hydrogen atom coordinating a cation
- Crystal structure of LiH2PO4, structural topology and hydrogen bonding in the alkaline dihydrogen orthophosphates
- The crystal structure of diamminesilver dinitroargentate, [Ag(NH3)2]Ag(NO2)2*
- A neutron-diffraction study of hemimorphite
- Die Kristallstruktur der Verbindung K4SrGe3O9, ein Cyclogermanat mit Zwölferringen
- Die Kristallstruktur des Rubidium-TrihydrogenDiphthalat-Dihydrats, RbH3(C8O4H4)2 · 2H2O
- Hydrogen bonding and cation ordering in Magnet Cove pectolite
- Die Kristallstruktur der Verbindung K4BaGe3O9
- Point symmetry, electrogyration, and quadratic electrooptic effects of cubic Sr(NO3)2, Ba(NO3)2, and Pb(NO3)2
- Piezooptic and quadratic electrooptic effects in cubic potassium cyanide
- Crystallographic data of pimaricin and rimocidin crystals, two polyene macrolide antifungal antibiotics
- Crystal data on amino acids salts containing anions of the type MeX62−
- Preliminary crystal data on hexabromoselenates(IV) of some amino acids
- Crystallographic data of hexaiodotellurates(IV) of some amino acids
- Single-crystal data of nickel chelate of 4,4′dihydroxy-3,3′-dibenzoyl biphenyl
- Space group and unit-cell dimensions of 1:1 adduct of bis(diphenyldithiophosphinato)cobalt(II) and α picoline
