Related Experiment Video
Updated: Jun 1, 2026

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
(E)-4-[4-(Dimethyl-amino)styr-yl]-1-methyl-pyridinium 4-bromo-benzene-sulfonate
Abstract:
In the title compound, C(16)H(19)N(2) (+)·C(6)H(4)BrO(3)S(-), the cation is nearly planar, with a dihedral angle of 3.19 (15)° between the pyridinium and the dimethylaminophenyl rings, and exists in the trans configuration. In the crystal packing, the cations and anions are linked into chains parallel to the c axis. These chains are stacked along the b axis. The crystal is stabilized by weak C-H⋯O and C-H⋯π inter-actions, and a π-π inter-action is also observed with a Cg⋯Cg distance of 3.5675 (19) Å.
More Related Videos
Related Concept Videos
Electrophilic Aromatic Substitution: Sulfonation of Benzene
NMR Spectroscopy of Benzene Derivatives
Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene
Chirality at Nitrogen, Phosphorus, and Sulfur
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
Nomenclature of Aromatic Compounds with Multiple Substituents
For disubstituted benzene derivatives, with two groups attached to the benzene ring, three constitutional isomers are possible. For example, consider dimethyl benzene, often called xylene, where the second methyl group can be substituted at the second, third, or fourth carbon. The relative position of the substituents is represented by prefixes ortho, meta, or...

