[Cr3O(CH3COO)6(H2O)3]NO3⋅HNO3⋅H2O, TRIAQUA-HEXAKIS(μ- ACETATO)-μ3-OXO-TRICHROMIUM(III) NITRATE NITRIC ACID SOLVATE MONOHYDRATE

Abstract

Reaction in methanol solution of the trinuclear ‘basic’ chromium(III) acetate with Pr(NO3)3⋅5H2O and further extraction by chloroform-acetone mixture led to the formation of novel unusual [Cr3O(CH3COO)6(H2O)3]NO3⋅HNO3⋅H2O (1) cluster with one “free” molecule of nitric acid. Complex 1 crystallizes in the monoclinic space group P21/c with, at room temperature, a = 13.624(2), b = 15.032(2), c = 15.180(2) Å, β = 112.98(3) °, Z = 4, and V = 2862.09 Å3. The obtained crystalline compound has been synthesized and characterized by IR and UV/Vis methods.

Keywords

• Chromium carboxylate
• Polynuclear complex
• UV-Vis