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Iodoform stored in an ampoule. Iodoform (also known as triiodomethane) is the organoiodine compound with the chemical formula C H I 3.It is a pale yellow, crystalline, volatile substance, with a penetrating and distinctive odor (in older chemistry texts, the smell is sometimes referred to as that of hospitals, where the compound is still commonly used) and, analogous to chloroform, sweetish taste.
Substrates are broadly limited to methyl ketones and secondary alcohols oxidizable to methyl ketones, such as isopropanol.The only primary alcohol and aldehyde to undergo this reaction are ethanol and acetaldehyde, respectively. 1,3-Diketones such as acetylacetone also undergo this reaction. β-ketoacids such as acetoacetic acid will also give the test upon heating.
Ketones give positive results in Brady's test, the reaction with 2,4-dinitrophenylhydrazine to give the corresponding hydrazone. Ketones may be distinguished from aldehydes by giving a negative result with Tollens' reagent or with Fehling's solution. Methyl ketones give positive results for the iodoform test. [7]
An experiment conducted by Meshram et al. in 2005 investigated making ketone halogenation a greener reaction, according to the principles of green chemistry. [5] [6] Meshram et al. investigated alternatives to the hazardous chemicals that are primarily used in ketone halogenation, finding that room temperature ionic liquids were a promising ...
It oxidatively cleaves methyl ketones to give iodoform. [2] References This page was last edited on 13 December 2024, at 13:22 (UTC). Text is available under the ...
More than 38 million Americans have diabetes, and between 90% and 95% of them have type 2 diabetes. While most are adults over the age of 45, an increasing number of children and teens are also ...
The acetone excess suppresses various possible side-reactions: the ketone and proline to an oxazolidinone; and two copies of the aldehyde and proline decarboxylating to an azomethine ylide. The flurry of research sparked by this publication clarified multiple long-standing questions.
Industrially significant organoiodine compounds, often used as disinfectants or pesticides, are iodoform (CHI 3), methylene iodide (CH 2 I 2), and methyl iodide (CH 3 I). [4] Although methyl iodide is not an industrially important product, it is an important intermediate, being a transiently generated intermediate in the industrial production ...