found: Work cat.: 70037114: Patai, S. Chemistry of acyl halides, 1972.
found: McGraw-Hill dict. of chemistry(Acyl halide: one of a large group of organic substances containing the halocarbonyl group; for example, acyl fluoride)
found: Properties of acyl halides, via LibreTexts chemistry website, July 6, 2020(There are a number of related compounds in which the -OH group in the acid is replaced by something else that leaves the acyl carbon in a +3 oxidation state. Compounds like this are described as acid derivatives. Acyl halides (also known as acid halides) are one example of an acid derivative. In this example, the -OH group has been replaced by a chlorine atom; chlorine is the most commonly used acid halide)
found: Wikipedia, July 6, 2020(An acyl halide (also known as an acid halide) is a chemical compound derived from an oxoacid by replacing a hydroxyl group with a halide group. If the acid is a carboxylic acid, the compound contains a -COX functional group, which consists of a carbonyl group singly bonded to a halogen atom. The general formula for such an acyl halide can be written RCOX, where R may be, for example, an alkyl group, CO is the carbonyl group, and X represents the halide, such as chloride. Acyl chlorides are the most commonly encountered acyl halides, but acetyl iodide is the one produced (transiently) on the largest scale)
