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4,15-Dimethyl-7,12-diazoniatricyclo[10.4.0.02,7]hexadeca-1(12),2,4,6,13,15-hexaene dibromide monohydrate.
- Source :
- Acta Crystallographica Section E: Crystallographic Communications; Sep2020, Vol. 76 Issue 9, Following p1467-1471, 10p
- Publication Year :
- 2020
-
Abstract
- The title compound, C<subscript>16</subscript>H<subscript>20</subscript>N<subscript>2</subscript><superscript>2+</superscript>·2Br<superscript>−</superscript>·H<subscript>2</subscript>O (1) is a member of the class of compounds called viologens. Viologens are quaternary salts of di­pyridyls and are especially useful as redox indicators as a result of their large negative one-electron reduction potentials. Compound 1 consists of a dication composed of a pair of 4-methyl­pyridine rings mutually joined at the 2-position, with a dihedral angle between the pyridine rings of 62.35 (4)°. In addition, the rings are tethered via the pyridine nitro­gen atoms by a tetra­methyl­ene bridge. Charge balance is provided by a pair of bromide anions, which are hydrogen bonded to a single water mol­ecule [D<subscript>O</subscript>...<subscript>Br</subscript> = 3.3670 (15) and 3.3856 (15) Å]. The crystal structure of 1, details of an improved synthesis, and a full analysis of its NMR spectra are presented. [ABSTRACT FROM AUTHOR]
- Subjects :
- DIHEDRAL angles
CRYSTAL structure
VIOLOGENS
REDUCTION potential
HYDROGEN bonding
Subjects
Details
- Language :
- English
- ISSN :
- 20569890
- Volume :
- 76
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Acta Crystallographica Section E: Crystallographic Communications
- Publication Type :
- Academic Journal
- Accession number :
- 145502232
- Full Text :
- https://doi.org/10.1107/S2056989020011147