Article Metrics


Online attention

On verdigris, Part III: Crystal structure, magnetic and spectral properties of anhydrous copper(II) acetate, a paddle wheel chain

DOI: 10.1002/zaac.201900125 DOI Help

Authors: Sebastian Bette (Max Planck Institute for Solid State Research; State Academy of Art and Design, Germany) , Alice Costes (State Academy of Art and Design, Germany) , Reinhard K. Kremer (State Academy of Art and Design, Germany) , Gerhard Eggert (State Academy of Art and Design, Germany) , Chiu C. Tang (Diamond Light Source) , Robert Dinnebier (Max Planck Institute for Solid State Research)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Zeitschrift Für Anorganische Und Allgemeine Chemie , VOL 2

State: Published (Approved)
Published: July 2019

Abstract: Pure anhydrous Cu(CH3COO)2 was obtained both, by thermal dehydration of Cu(CH3COO)2·H2O and by drying a commercially purchased mixture of Cu(CH3COO)2·H2O and Cu(CH3COO)2 in a nitrogen atmosphere using P2O5 as drying agent. The crystal structure was solved ab initio from synchrotron X‐ray powder diffraction (XRPD) data at 150 °C and from laboratory XRPD data at ambient conditions and found to be isotypic to anhydrous chromium(II), molybdenum(II) and rhodium(II) acetate. Cu(CH3COO)2 crystallizes in space group P1 (no. 2) with lattice parameters of a = 5.1486(3) Å, b = 7.5856(6) Å, c = 8.2832(6) Å, α = 77.984(4)°, β = 75.911(8)°, γ = 84.256(6)° at ambient conditions. Cu2(CH3COO)4 paddle wheels with short (2.6 Å) Cu–Cu distances form chains in a direction, which is the main motif in the crystal structure. Due to their identical structural main motif Cu(CH3COO)2·H2O and Cu(CH3COO)2 exhibit a similar bluish‐green color, almost identical UV/Vis spectra and comparable magnetic properties. The temperature dependent magnetic susceptibility also indicates only weak inter‐dimer spin exchange between neighbouring Cu2(CH3COO)4 paddle wheels.

Journal Keywords: Copper acetate; Structure elucidation; Carboxylate ligands; X‐ray diffraction; Magnetic properties

Subject Areas: Archaeological and Cultural Heritage, Chemistry

Instruments: I11-High Resolution Powder Diffraction

Added On: 25/07/2019 14:38

Discipline Tags:

Cultural Heritage Humanities Chemistry Inorganic Chemistry

Technical Tags:

Diffraction X-ray Powder Diffraction