5,5-dimethylcyclohexane-1,3-dione

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Names

While 5,5-dimethylcyclohexane-1,3-dione is the IUPAC name for this molecule, it is also known as; 5,5-dimethyl-1,3-cyclohexane, cyclomethone, medon, methon, methode, 1,1-dimethyl-3,5-cyclohexanedione, dimethlydihydroresorcinol, but most commonly dimedone

Physical Properties

5,5-dimethylcyclohexane-1,3-dione usually comes in the form of a yellow crystal. It is stable under ambient conditions and soluble in water, as well as ethanol and methanol. It has a boiling point range of 147 - 150 ^oC (420 - 423 ^oK), at which point it decomposes. The molecule's molecular formula is (CH₃)₂C₆H₆(=O)₂. From this the molecular weight (the weight of 6 * 10²³ molecules) can be determined as 140 ((12 * 8) + (1 * 12) + (16 * 2)).

Uses in Chemistry

5,5-dimethylcyclohexane-1,3-dione is used in organic "wet" chemistry to determine whether a compound contains an aldehyde group. Cyclohexanediones in general can be used as catalyst in the formation of transition-metal complexes. Other uses include; applications in colourimetry, crystal chemistry and crystallography, luminescence and spectrophotometric analysis. It can also be used for chemistry involving organic compounds of low electrical resistance.