1400923-75-2

Basic information

• Product Name: Cu(triphenylphosphine)(2-(p-tolylazo)imidazole)I
• Synonyms: Cu(triphenylphosphine)(2-(p-tolylazo)imidazole)I
• CAS NO: 1400923-75-2
• Molecular Weight: 638.958
• Mol File: 1400923-75-2.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: Cu(triphenylphosphine)(2-(p-tolylazo)imidazole)I(CAS DataBase Reference)
• NIST Chemistry Reference: Cu(triphenylphosphine)(2-(p-tolylazo)imidazole)I(1400923-75-2)
• EPA Substance Registry System: Cu(triphenylphosphine)(2-(p-tolylazo)imidazole)I(1400923-75-2)

Safety Data

• Hazardous Substances Data: 1400923-75-2(Hazardous Substances Data)

Upstream product

• 34938-48-2 2-(p-tolylazo)imidazole 
• 7681-65-4 copper(l) iodide 
• 603-35-0 triphenylphosphine 

Relevant articles and documents

Structure, electrochemistry and photochromism of [Cu(RaaiR′)(PPh 3)X] (RaaiR′ = 1-alkyl-2-(arylazo)imidazole; X = Cl, Br, I) and correlation with theoretical calculations

The reaction between CuX (X = Cl, Br, I), PPh3 and 1-alkyl-2-(arylazo)imidazole (RaaiR′) has synthesized [Cu(RaaiR′) (PPh3)X]. The composition has been established by spectroscopic (UV-Vis, IR, 1H NMR) data and the single crystal X-ray diffraction study of [Cu(MeaaiH)(PPh3)Cl] and [Cu(MeaaiH)(PPh3)Br] (MeaaiH = 2-(p-tolylazo)imidazole) have confirmed the structures. These complexes show trans-to-cis (E-to-Z) photoisomerisation upon UV light irradiation. Quantum yields (φE→Z) of [Cu(RaaiR′) (PPh3)X] are lower than the free ligand values. The rate of isomerisation follows the sequence [Cu(RaaiR′)(PPh3)Cl] 3)Br] 3)I]. The cis-to-trans (Z-to-E) isomerisation is very slow upon light irradiation and has been achieved by a thermal route. The activation energy (Ea) of the Z-to-E isomerisation has been calculated by a controlled temperature reaction. DFT calculations of the optimized geometry of representative complexes have been used to determine the composition and energy of the molecular levels.