| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1335485 | Polyhedron | 2014 | 8 Pages |
Abstract
The [Zn(SRaaiNRâ²)(H2O)X2] (SRaaiNRâ²Â = 1-alkyl-2-{(o-thioalkyl)phenylazo}imidazole) complexes have been characterized by different spectral data and a single crystal structure in one case. UV light irradiation in acetonitrile solution of the complexes shows E-to-Z (E and Z refer to trans and cis-configuration) isomerisation of the coordinated SRaaiNRâ² ligand about the -NN- bond. The rate of isomerisation follow: [Zn(SRaaiNRâ²)(H2O)Cl2] < [Zn(SRaaiNRâ²)(H2O)Br2] < [Zn(SRaaiNRâ²)(H2O)I2]. The quantum yields (ÏEâZ) and activation energies (Ea) of the isomerisation of the complexes are lower than those of the free ligands. The decrease in electronegativity of X increases the rate of E-to-Z photoisomerisation.
Related Topics
Physical Sciences and Engineering
Chemistry
Inorganic Chemistry
Authors
Shefali Saha (Halder), Partha Mitra, Chittaranjan Sinha,