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Concept
Cuprate
Summary
Cuprates are a class of compounds that contain copper (Cu). They can be broadly categorized into two main types:
- Inorganic Cuprates: These are non-stoichiometric compounds with a general formula of XYCumOn. Many of these compounds are known for their superconducting properties. An example of an inorganic cuprate is the tetrachloridocuprate ([CuCl4]2−), an anionic coordination complex that features a copper ion surrounded by four chloride ions.
- Organic Cuprates: These are organocopper compounds with a general formula of R2Cu. These compounds, characterized by copper bonded to organic groups, are frequently used in organic synthesis due to their reactivity. An example of an organic cuprate is dimethylcuprate [Cu(CH3)2]−. One of the most studied cuprates is YBa2Cu3O7, a high-temperature superconducting material. This oxide cuprate has been the subject of extensive research due to its ability to conduct electricity without resistance at relatively high temperatures. The term 'cuprate' originates from 'cuprum', the Latin word for copper. It is primarily used in the context of oxide materials, anionic coordination complexes, and anionic organocopper compounds, reflecting the diverse roles of copper in chemistry. The term is mainly used in three contexts: oxide materials, anionic coordination complexes, and anionic organocopper compounds. One of the simplest oxide-based cuprates is the copper(III) oxide KCuO2, also known as "potassium cuprate(III)". This species can be viewed as the K+ salt of the polyanion [CuO2−]n. As such the material is classified as a cuprate. This dark blue diamagnetic solid is produced by heating potassium peroxide and copper(II) oxide in an atmosphere of oxygen: K2O2 + 2 CuO → 2 KCuO2 Other cuprates(III) of alkali metals are known; in addition, structure of KCuO2, RbCuO2 and CsCuO2 has been determined as well. KCuO2 was discovered first in 1952 by V. K. Wahl and W. Klemm, they synthesized this compound by heating copper(II) oxide and potassium superoxide in an atmosphere of oxygen.
Official source
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