Electron paramagnetic resonance study of a copper(II) trimithylphospine oxide complex in Y zeolite

✍ Scribed by Richard G. Herman

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 956 KB
• Volume: 34
• Category: Article
• ISSN: 0020-1693
• DOI: 10.1016/s0020-1693(00)94688-7

✦ Synopsis

Addition of trimethylphosphine to a rapidly dehydrated copper Y zeolite resulted in the immediate reduction of the copper to the univalent oxidation state. After a brief evacuation, addition of oxygen caused the instantaneous oxidation of the &(I) ions and the complexing ligands. It is proposed that the resultant electron paramagnetic resonance (EPR) parameters of gll = 2.44, A 11 = -87 Gauss, and gl = 2.05 are due to tetrakis(trimethylphosphine oxide)copper(II) complexes located in the supercages of the Y zeolite lattice. By comparison to the EPR and bonding parameters of the aquo, ammine, and pyridine copper

analogs, it is suggested that this complex possesses pseudotetrahedral symmetry.