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One-dimensional staircase aggregates in crystals of 1,7-bis(dimethylamino)heptamethinium hexafluorophosphate, a polymethine dye
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July 28, 2010
Abstract
The title compound C11H19N2 · PF6 crystallises in the monoclinic space group C2/m (no. 12) with a = 1234.4 pm, b = 942.8 pm, c = 717.6 pm, β = 109.95°, Z = 2 and Dx = 1.372 g cm−3. R = 0.08 for 627 unique reflections with I > 2σ(I) at 298 K. The cation as well as the anion are disordered. A polarization of the polymethine system by the counterion is not observed, because the dye molecule exhibits a symmetrical polymethine structure. The chromophores are closely stacked in one-dimensional staircase aggregates which are separated by the counterions. Their parallel arrangement in the unit cell should lead to only one transition dipole moment.
Published Online: 2010-7-28
Published in Print: 1997-7-1
© 2015 Oldenbourg Wissenschaftsverlag GmbH, Rosenheimer Str. 145, 81671 München
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Articles in the same Issue
- Icosahedral coincidence rotations
- Localization and integration of diffraction spots from two-dimensional X-ray detector images by digital filtering
- Finite periodicity and crystal structures
- Structure determination from powder data using anomalous scattering: difference and partial, Patterson densities, and phases of structure factors
- Phase transitions of modulated Co-åkermanite, Ca2CoSi2O7
- Preparation and single crystal structure refinement of mixed orthophosphates M3Cr4(PO4)6 (M = Mg, Zn, Cu) – copper(II) in compressed octahedral coordination1
- Crystal structures of Ca5Ge3O11 and wollastonite-type GaGeO3
- One-dimensional staircase aggregates in crystals of 1,7-bis(dimethylamino)heptamethinium hexafluorophosphate, a polymethine dye
- Crystal structures of N-4-methyl phenyl)-2,2,2-trichloroacetamide, N-2,3-dimethyl phenyl)-2,2,2-trichloroacetamide and N-(2-nitro phenyl)-2,2,2-trichloroacetamide
- The structure of 6-(2-hydroxybenzylamino)purine acetic acid solvate
- Structural variations in the mercury(II) bis(1,1-dithiolate)s: the crystal and molecular structure of [Hg(S2CNMe2)2]
