Pronunciation: [mˈɛθənˌa͡ɪl] (IPA) 
The word "methenyl" is spelled with a "th" instead of a "t" because it is derived from the chemical term "methene", which is pronounced /mɛθiːn/. The "n" at the end of "methene" combines with the "yl" suffix to form "methenyl", which is pronounced /mɛθəniːl/. This word is often used in organic chemistry to refer to a group or molecule that contains a double-bonded carbon and a single-bonded hydrogen.
Methenyl is a term used in organic chemistry to describe a specific functional group or radical. The term "methenyl" refers to an organic compound or molecule that contains a carbon atom double-bonded to a hydrogen atom (C=H). This functional group is often represented as R-CH=, where R can represent any organic substituent or group that may be present.
The methenyl group is primarily found in organic compounds known as aldehydes. Aldehydes are a class of organic compounds that contain a carbonyl group (-C=O) with a hydrogen atom bonded to the carbon atom adjacent to it (R-CHO). In aldehydes, the carbon-hydrogen bond present in the methenyl group is highly reactive, making these compounds versatile intermediates in many chemical reactions.
The introduction of the methenyl group into a molecule can impart unique chemical and physical properties. The presence of the double bond between carbon and hydrogen can affect the reactivity, stability, and overall behavior of the compound. The methenyl group is often involved in bond-forming reactions, such as nucleophilic additions and condensation reactions, making it an essential functional group in various synthetic applications.
Overall, methenyl refers to a carbon atom double-bonded to a hydrogen atom and can be found in aldehydes and other compounds. The presence of this functional group contributes to the unique characteristics and reactivity of the molecule in which it is found.
Formyl.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The word "methenyl" is derived from the combination of two parts: "meth-" and "-enyl".
"Meth-" is a prefix derived from the Greek word "methy", which means "wine" or "intoxication". It is commonly found in scientific and chemical terminology as a prefix for compounds containing a single carbon atom.
The suffix "-enyl" is a combining form derived from the word "ene", which refers to the presence of a carbon-carbon double bond in organic chemistry. It essentially denotes the presence of the unsaturated hydrocarbon group -CH=CH-.
Therefore, combining "meth-" and "-enyl", the term "methenyl" represents an organic chemical group consisting of a single carbon atom attached to a carbon-carbon double bond.
