Alicyclic hydrocarbons ring opening

Alicyclic Hydrocarbons. These refer to cyclic analogues of aliphatic hydrocarbons and are named accordingly, using the piefix cyclo-." Their properties are similar to their open-chain aliphatic counterparts. Alicyclic hydrocarbons are subdivided into monocyclic (cycloalkanes, cycloalkenes, cycloalkynes, cycloalkadienes, etc.) and polycyclic aliphatic compounds. Monocyclic aliphatic structures having more than 30 carbon atoms in the ring are known, but those containing 5 or 6 carbon atoms are more commonly found in nature [47, p. 28]. 

Cyclic Hydrocarbons. These are structures in which the carbon atoms form a ring instead of an open chain. They are also called carbocyclic or homocyclic compounds. They are divided into two classes alicyclic (or cycloaliphatic) and aromatic compounds. 

Hydrocarbons are an important class of organic componnds composed solely of carbon and hydrogen and are widely dis-tribnted in nature. These snbstances occur in petroleum products, oil and grease, natural gases, coal and coal tars, and deep earth gases. Hydrocarbons may be classified into three broad categories (1) open-chain aliphatic componnds, (2) cyclic or alicyclic compounds of naphthene type, and (3) aromatic ring compounds. 

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