The number of sigma () and pi () bonds in pent-2-en-4-yne is:

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🧠 The Bond Blueprint
To count bonds accurately, you must first "draw" the molecule correctly from its IUPAC name. Pent-2-en-4-yne tells us the chain length, the position of the double bond, and the position of the triple bond.

🗺️ The Standard Approach
1. The Skeleton: 
2. Adding Hydrogens:
   -  needs 3: 
   -  needs 1: 
   -  needs 1: 
   -  needs 0:  (already has 4 bonds)
   -  needs 1: 
   Structure: 
3. Counting  bonds: 
   - One double bond .
   - One triple bond .
   - Total .
4. Counti

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