Define catenations .What is its special significance with respect to organic chemistry ?

Explanation

**Step-by-Step Solution:**

1. **Definition of Catenation:**
- Catenation refers to the ability of atoms of the same element to link together to form long chains or structures. This process involves the formation of covalent bonds between the same type of atoms.

2. **Example of Catenation:**
- A prime example of catenation is seen in carbon. Carbon atoms can bond with each other to create long chains or complex structures. For instance, in hydrocarbons, carbon atoms can form chains of varying lengths, which is fundamental to organic chemistry.

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