Antiacetaldoxime

Antiacetaldoxime is a chemical compound with the formula CH3CH=NOH. It is one of the two geometric isomers of acetaldoxime, the other being synacetaldoxime. The "anti" designation refers to the relative positions of the methyl group (CH3) and the hydroxyl group (OH) across the carbon-nitrogen double bond. In antiacetaldoxime, these groups are on opposite sides, which is typically the more stable configuration.

This compound is an oxime, which is a functional group derived from an aldehyde or ketone where the carbonyl oxygen is replaced by a =NOH group. Antiacetaldoxime is formed from the reaction of acetaldehyde with hydroxylamine. It exists as a white crystalline solid at room temperature and is soluble in organic solvents and water.

The geometric isomerism of antiacetaldoxime means it has different physical and sometimes chemical properties compared to its syn isomer. Spectroscopic methods like Nuclear Magnetic Resonance (NMR) are commonly used to distinguish between the two isomers. Antiacetaldoxime is a building block in organic synthesis and can be used in the preparation of various nitrogen-containing compounds. Its applications are primarily in research and development within the chemical industry.