shoNa i used these book only for preparation of organic chemistry ,for remaining portion of the chemistry like physical etc i have other books . you can take my id from my profile


In organic chemistry a diene or diolefin is a hydrocarbon that contains two carbon double bonds. Dienes occur occasionally in nature. Conjugated dienes are widely used as monomers in the polymer industry.dienes are aromatic hydrocarbons ( which carry at least single benzene ring in its structure ).
Petroleum (also known as crude oil or simply oil) is a fossil fuel that was formed from the remains of ancient marine organisms. petroleum are too aromatic hydrocarbons
Chemistry
Crude oil is composed of hydrocarbons, which are mainly hydrogen (about 13% by weight) and carbon (about 85%). Other elements such as nitrogen (about 0.5%), sulfur (0.5%), oxygen (1%), and metals such as iron, nickel, and copper (less than 0.1%) can also be mixed in with the hydrocarbons in small amounts.
The way molecules are organized in the hydrocarbon is a result of the original composition of the algae, plants, or plankton from millions of years ago. The amount of heat and pressure the plants were exposed to also contributes to variations that are found in hydrocarbons and crude oil.

relation between diene and petroleum
Aliphatic unsaturated hydrocarbons, like olefins and diolefins,
are formed during both thermal and catalytic cracking of heavy
petroleum fractions.