Abstract
In the title salt C7H10NO+·C8H3Cl2O4 − the benzene rings of the cation and anion are essentially parallel [inter-ring dihedral angle 4.8 (2)°]. In the anion the carboxylic acid and carboxylate groups make dihedral angles of 19.0 (2) and 79.5 (2)°, respectively, with the benzene ring. Aminium N—H⋯O, carboxylic acid O—H⋯O and weak aromatic C—H⋯O hydrogen-bonding associations with carboxyl O-atom acceptors together with cation–anion π–π ring interactions [minimum ring centroid separation = 3.734 (3) Å] give rise to a sheet structure lying parallel to (001).
Highlights
In the title salt C7H10NO+C8H3Cl2O4 the benzene rings of the cation and anion are essentially parallel [inter-ring dihedral angle 4.8 (2) ]
C7H10NO+ C8H3Cl2O4, the title compound, and the structure is reported. In this structure (Fig. 1), the Dichlorophthalic acid (DCPA) anion does not have the 'planar′ conformation which is found in a large number of the 1:1 structures, but has the carboxylic acid and carboxylate groups rotated out of the benzene plane forming dihedral angles of 19.0 (2)° and 79.5 (2)°, respectively, with it
Molecular conformation and atom-numbering scheme for the cation and anion in the title salt, with the inter-species hydrogen bond shown as a dashed line
Summary
R factor = 0.067; wR factor = 0.117; data-to-parameter ratio = 13.1. In the title salt C7H10NO+C8H3Cl2O4 the benzene rings of the cation and anion are essentially parallel [inter-ring dihedral angle 4.8 (2) ]. In the anion the carboxylic acid and carboxylate groups make dihedral angles of 19.0 (2) and. H O hydrogen-bonding associations with carboxyl O-atom acceptors together with cation–anion – ring interactions [minimum ring centroid separation = 3.734 (3) Å] give rise to a sheet structure lying parallel to (001)
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