Organic Chemistry. IB. General Characteristics of Organic Molecules. Organic chemistry is the branch of chemistry that studies carbon compounds. Biochemistry or biological chemistry is the study of the chemistry of living things.
In straight-chain hydrocarbons the C atoms are joined in a continuous chain.
2. Number the carbon atoms in the longest chain starting with the end closest to a substituent.
4. When two or more substituents are present, list them in alphabetical order.