When you call it an alkyl group, it's attached to something else.

Here, there are three identical alkyl groups attached to carbon atoms 2, 3, and 3.

It may be prepared in the ordinary manner of alkyl bromides, by reacting isopropanol with phosphorus and bromine, or with phosphorus tribromide.

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.

Diazonium compounds or diazonium salts are a group of organic compounds sharing a common functional group R N2 X where R can be any organic residue such alkyl or aryl and X is an inorganic or organic anion such as a halogen.

A sulfonic acid (or sulphonic acid) refers to a member of the class of organosulfur compounds with the general formula R S( O)2 OH, where R is an organic alkyl or aryl group and the S( O)2 OH group a sulfonyl hydroxide.

Syria further asserts that these pollutants, combined with the presence of organics (particularly phthalic esters, n paraffins and alkyl IPA) in the external patinas, are evidence of pollution caused by burning oil and, therefore, probably a consequence of Iraq's invasion and occupation of Kuwait.