Copper(II) oxalate explained

Copper(II) oxalate are inorganic compounds with the chemical formula . The value of x can be 0, 0.44, and 1. Two of these species are found as secondary minerals (degradation of minerals), whewellite (monohydrate and moolooite (0.44 hydrate).[1] The anhydrous compound has been characterized by X-ray crystallography.[2] Many transition metal oxalate complexes are known.

Copper(II) monooxalates are practically insoluble in all solvents. They are coordination polymers.[3]

Synthesis

Copper(II) oxalate can be produced by precipitation from acidified aqueous copper(II) salts and oxalic acid.[4] [5]

Reactions

Upon heating to 130 °C, the hydrated copper(II) oxalates convert to the anhydrous cupric oxalate. Further heating at higher temperatures under an atmosphere of hydrogen gives copper metal, suitable as a reagent.[4]

The hydrates bind Lewis bases.

Hydrated copper(II) oxalate reacts with alkali metal oxalates and ammonium oxalate to give bis(oxalato)cuprate:[6]

Uses

Copper oxalate is used as a catalyst for organic reactions, as a stabilizer for acetylated polyformaldehyde.[7] [8]

Related compounds

Notes and References

  1. 10.1039/C4DT01689K . The Crystal structure of paramagnetic copper(ii) oxalate (CuC2O4): Formation and thermal decomposition of randomly stacked anisotropic nano-sized crystallites . 2014 . Christensen . Axel Nørlund . Lebech . Bente . Andersen . Niels Hessel . Grivel . Jean-Claude . Dalton Trans . 43 . 44 . 16754–16768 .
  2. Zum Strukturprinzip des fehlgeordneten Kupfer(II)-Oxalats CuC2O4·nH2O. Monatsberichte der Deutschen Akademie der Wissenschaften zu Berlin. 1968. 10. 581-604. Schmittler, H..
  3. Web site: Hazardous Substances Data Bank (HSDB) : 265 . . 17 June 2021 . en.
  4. Book: O. Glemser. R. Sauer. Copper(II) Sulfide. Handbook of Preparative Inorganic Chemistry, 2nd Ed. . G. Brauer. Academic Press. 1963. NY,NY. 2pages=1017-1018.
  5. Book: Gooch . Frank Austin . The precipitation of copper oxalate in analysis . 1909 . 890741677 . 448 .
  6. Book: 10.1002/9780470132371.ch1 . Potassium Dioxalatocuprate(II) 2-Hydrate . Inorganic Syntheses . 1960 . Kirschner . Stanley . McLean . John A. . Meerman . Gerardine . 6 . 1–2 . 978-0-470-13165-7 .
  7. Book: Richardson . H. Wayne . Handbook of Copper Compounds and Applications . 1997 . CRC Press . 978-0-8247-8998-5 . 84 .
  8. Book: 10.1002/14356007.a07_567 . Copper Compounds . Ullmann's Encyclopedia of Industrial Chemistry . 2000 . Richardson . H. Wayne . 978-3-527-30385-4 .
  9. Royappa . A. Timothy . Royappa . Andrew D. . Moral . Raphael F. . Rheingold . Arnold L. . Papoular . Robert J. . Blum . Deke M. . Duong . Tien Q. . Stepherson . Jacob R. . Vu . Oliver D. . Chen . Banghao . Suchomel . Matthew R. . Golen . James A. . André . Gilles . Kourkoumelis . Nikolaos . Mercer . Andrew D. . Pekarek . Allegra M. . Kelly . Dylan C. . Copper(I) oxalate complexes: Synthesis, structures and surprises . Polyhedron . November 2016 . 119 . 563–574 . 10.1016/j.poly.2016.09.043 . free .

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Copper(II) oxalate".

Except where otherwise indicated, Everything.Explained.Today is © Copyright 2009-2024, A B Cryer, All Rights Reserved. Cookie policy.