Question

Which of the following structures have $3^{\circ }$ (Tertiary) Carbon atom ?

• A.
• B.
• C.
• D.

Answer 1

Answer: (A), (C)

Primary or $1^{\circ }$ carbon, is carbon attached to one other carbon.

Secondary or $2^{\circ }$ carbon is attached to two other carbons.

Tertiary or $3^{\circ }$ carbon is attached to three other carbons.

Quaternary or $4^{\circ }$ carbon is attached to four other carbons.

In option (a) and (c) we can see that the central carbon has three carbon atoms attached to them. So they are $3^{\circ }$ or tertiary carbons.