The crystal structure of C.I. Pigment Red 6, 4-chloro-2-nitrophenylazo-2-naphthol
Abstract
The crystal and molecular structure of C.I. Pigment Red 6, 4-chloro-2-nitrophenylazo-2-naphthol has been determined by x-ray diffraction techniques. It crystallizes in the monoclinic system with cell parameters a = 12.293 ± 0.005 Å, b = 6.958 ± 0.003 Å, c = 15.780 ± 0.005 Å, β = 94.22 ± 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 55° (CuKα radiation) The hydrogen atoms have been found and included but not refined The molecule exists as the hydrazone tautomer and intramolecular hydrogen bonds keep the molecules approximately planar; the slight deviations from planarity are, in the main, explained by packing considerations. The molecules are packed in columns with alternate molecules antiparallel and are linked by van der Waals forces.
© 2015 Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München
Articles in the same Issue
- The crystal structure of germanium dibromide*
- Quadratischer elektrostriktiver Tensor des rhombischen Calciumformiats
- Die Kristallstruktur von Fe2Si, ihre Verwandtschaft zu den Ordnungsstrukturen des α-(Fe,Si)-Mischkristalls und zur Fe5Si3-Struktur
- The behaviour of triplet relationships in the case of a small number of atoms in the unit cell
- The adjunction of antiidentity operations to point groups, including a derivation of the magnetic point groups
- Clinoptilolite: the distribution of potassium atoms and its role in thermal stability
- Die Kristallstruktur von (+)- und (−)-Ru[C6H5(CH3)PCH2CH2,P(C6H5)CH3],Cl2
- Zur Kompensation der elektrostatischen Kräfte bei der Messung elektrooptischer Effekte
- Tables of the Σ1 relationships: triclinic, monoclinic and orthorhombic space groups
- The crystal structure of C.I. Pigment Red 6, 4-chloro-2-nitrophenylazo-2-naphthol
- Madelung constants for millerite-type structures and for high-pressure GeP-type structures: a contribution to the crystal chemistry of A[5]B[5] compounds
- The crystal structures of α and γ SrUO4
- On the use of Guinier-Hägg film data for structure analysis
Articles in the same Issue
- The crystal structure of germanium dibromide*
- Quadratischer elektrostriktiver Tensor des rhombischen Calciumformiats
- Die Kristallstruktur von Fe2Si, ihre Verwandtschaft zu den Ordnungsstrukturen des α-(Fe,Si)-Mischkristalls und zur Fe5Si3-Struktur
- The behaviour of triplet relationships in the case of a small number of atoms in the unit cell
- The adjunction of antiidentity operations to point groups, including a derivation of the magnetic point groups
- Clinoptilolite: the distribution of potassium atoms and its role in thermal stability
- Die Kristallstruktur von (+)- und (−)-Ru[C6H5(CH3)PCH2CH2,P(C6H5)CH3],Cl2
- Zur Kompensation der elektrostatischen Kräfte bei der Messung elektrooptischer Effekte
- Tables of the Σ1 relationships: triclinic, monoclinic and orthorhombic space groups
- The crystal structure of C.I. Pigment Red 6, 4-chloro-2-nitrophenylazo-2-naphthol
- Madelung constants for millerite-type structures and for high-pressure GeP-type structures: a contribution to the crystal chemistry of A[5]B[5] compounds
- The crystal structures of α and γ SrUO4
- On the use of Guinier-Hägg film data for structure analysis
