Organometallic compounds are organic substances that have bonds between carbon and metal. Alkaline earth metals and other metals are among the metals. Furthermore, metalloids including boron, silicon, and selenium have been reported to sometimes produce organometallic compounds that are used in industrial chemical processes. Examples of typical organometallic compounds are organolithium, organomagnesium, Grignard reagent, organocuprate, organozinc, and organocadmium. Organometallic compounds are those in which at least one bond exists between the carbon atom of an organic molecule and a metallic element. In both the lab and the industry, they are commonly used as catalysts and intermediates. Covalency exists among the elements because of the metal–carbon connection. The unique quality of these compounds is that, when held at room temperature, they are solids, while some are liquids.