Most often, compounds containing carbon, which are associated with minerals, or those that don’t contain hydrogen or fluorine are thought separate from classical organic compounds. However, this is not entirely true. There are also oxides of carbon, which are relatively simple. The most common of these is carbon dioxide. It is a minor component of the Earth’s atmosphere. When dissolved in water, carbon dioxide forms carbonic acid. Another common oxide is carbon monoxide. It is a colorless, odorless gas. With reactive metals, like tungsten, carbon forms carbides or acetylides. These compounds are alloys with high melting points. With an electronegativity of 2.5, carbon forms covalent bonds easiest. Some other forms of carbides are “covalent lattices”, like carborundum, which is a lot like diamond.

http://en.wikipedia.org/wiki/Carbon,

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