A new B-Anderson-type heteropoly compound containing binuclear copper(II) coordination ions: synthesis, molecular structure and properties of [Cu₂(phen)₂(CH₃COO)₂(H₂O)₂] [HAl(OH)₆(Mo₆O₁₈)]·2.5H₂O (phen = 1,10-phenanthroline)

Abstract

A new B-Anderson-type heteropoly compound [Cu₂(phen)₂(CH₃COO)₂(H₂O)₂] [HAl(OH)₆(Mo₆O₁₈)] · 2.5H₂O containing binuclear copper(II) coordination ions has been synthesized by reaction of AlCl₃ · 6H₂O, Na₂MoO₄ · 2H₂O, glacial acetic acid, 1,10-phenanthroline and CuCl₂ · 2H₂O in methanol--water mixed solution and characterized by IR, UV-Vis spectra, TG-DTA analysis and X-ray crystallography. From X-ray single-crystal structural analysis, the title compound crystallizes in a triclinic lattice, P space group, with a = 13.379(3), b = 17.388(4), c = 18.063(4) Å, α = 85.97(3), β = 69.79(3), γ = 69.22(3)°, V = 3680.4(13) ų, Z = 2, R ₁ = 0.0797, wR ₂ = 0.1787. In the title compound, the two Cu²⁺ coordination cations are combined with each other through two acetate bridges and have five-coordinate, distorted square-pyramid geometry with N2O3 bonding at each metal. In addition, there are also two crystallographically independent ‘one-half ’ Anderson-type polyanions in the title compound lattice.

Keywords:

• Anderson structure
• Polyoxometalates
• Hybrid materials
• Heteropoly compounds

Acknowledgements

Financial support from Specialized Research Fund for the Doctoral Program of Higher Education, Henan Innovation Project for University Prominent Research Talents, the Institute of Education of Henan Province and Natural Science Foundation of Henan Province is gratefully acknowledged.