enol

Enols, or more formally, alkenols, are a type of reactive structure or intermediate in organic chemistry that is represented as an alkene (olefin) with a hydroxyl group attached to one end of the alkene double bond. The terms enol and alkenol are portmanteaus deriving from "-ene"/"alkene" and the "-ol" suffix indicating the hydroxyl group of alcohols, dropping the terminal "-e" of the first term. Generation of enols often involves removal of a hydrogen adjacent (a-) to the carbonyl group—i.e., deprotonation, its removal as a proton, H⁺. When this proton is not returned at the end of the stepwise process, the result is an anion termed an enolate (see images at right). The enolate structures shown are schematic; a more modern representation considers the molecular orbitals that are formed and occupied by electrons in the enolate. Similarly, generation of the enol often is accompanied by "trapping" or masking of the hydroxy group as an ether, such as a silyl enol ether.

Ørland Airport (; ), also known as Ørland Airport, Brekstad () is the civilian sector of the Ørland Main Air Station. It is located northwest of the town of Brekstad, the administrative centre of the municipality of Ørland, in Sør-Trøndelag county, Norway. The civilian sector is municipal, although the runway, air traffic control and rescue services are operated by the Royal Norwegian Air Force.