Synthesis and Crystal Structure of a New Aluminum(III) Oxalate Complex, (C₂H₁₀N₂)₂ [Al₂(μ-O₂)(C₂O₄)₄].2H₂O

Abstract

A new Al(III) oxalate complex, (C₂H₁₀N₂)₂.[Al₂(μ-O₂)(C₂O₄)₄]·2H₂O (1), has been synthesized by hydrothermal technique. Single-crystal X-ray diffraction analysis reveals that the compound crystallizes in triclinic space group P-1 (2) with cell parameters a = 7.5297 (5) Å, b = 8.1418 (6) Å, c = 9.8279 (8) Å, α = 107.48 (1)°, β = 99.96 (1)°, γ = 95.09 (1)°. Four oxalate ligands binds with two metal centers in bidentate fashion and creates a rare μ-oxo bridged Al(III) dimer. Further, these dinuclear subunits, [Al₂(μ-O₂)(C₂O₄)₄]⁴⁻, are linked by ethylene diamine [(NH₃CH₂CH₂NH₃)²⁺] and water molecules via hydrogen bonding through ab-planes making a two-dimensional supramolecular layered structure.

Keywords:

• Al(III) complex
• oxalate ligand
• dimer
• hydrogen bonding
• supramolecular 2D layers

Additional information

Funding

The authors are thankful for financial support from the DST Nano Mission (Project No. SR/S5/NM-92/2006) and are also grateful to the Sophisticated Instrumentation Centre, IIT Indore, for the data collection.