Carboxylic acid derivatives react with nucleophiles in nucleophilic acyl substitution. It reacts with electrophilic chlorides including acyl chlorides, sulfur chlorides, and phosphorus chloride. Representative laboratory routes to aromatic acyl halides are comparable to those for aliphatic acyl halides. A specific example of an acyl chloride is acetyl chloride, CHCOCl. Cyclization reactions of vinyl, aryl, and acyl radicals are also known. It undergoes the characteristic reactions of acyl chlorides. It belongs to the class of organic compounds called acyl halides. The reactivity of chloroformates and acyl chlorides are similar. Photochemical decomposition of the acyl azide is also possible. These substrates may not be convertible to the acyl chlorides. It is a precursor to oxazolines via its reaction with acyl chlorides. A molecule of coenzyme A carrying an acyl group is also referred to as "acyl-CoA". Similar problems can result if one inhales acyl halide vapors. Simply add the name of the attached halide to the end of the acyl group. Dozens of ATP equivalents are generated by the beta-oxidation of a single long acyl chain.