Dipotassium cyclooctatetraenide, sometimes abbreviated K2COT, is an organopotassium compound with the formula K2C8H8. It is a brown solid that is used as a precursor to cyclooctatetraenide complexes, such as uranocene (U(C8H8)2). Analogs of K2C8H8 are known with ring substituents, with different alkali metals, and with various complexants.
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Preferred IUPAC name
Dipotassium cycloocatetraenediide | |
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C8H8K2 | |
Appearance | beige solid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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Potassium cyclooctatetraenide is formed by the reaction of cyclooctatetraene with potassium metal:
The reaction entails 2-electron reduction of the polyene and is accompanied by a color change from colorless to brown.[1]
The structure of K2(diglyme)C8H8 has been characterized by X-ray crystallography of the derivatives with diglyme complexed to the potassium cations. The C8H8 unit is planar with an average C-C distance of 1.40 A.[2]
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