Chemistry · Molecular Orbital Theory: Its important features, LCAOs, types of molecular orbitals (bonding, antibonding), sigma and pi-bonds

The number of bonds and bonds in 1, 3-butadiene are respectively:

The number of \( \sigma \) bonds and \( \pi \) bonds in 1, 3-butadiene are respectively:

  • A. 9 and 2
  • B. 6 and 2
  • C. 9 \) and 6
  • D. none of these

Step-by-step solution

1,3-butadiene (CH2=CH-CH=CH2) has 9 σ bonds: 3 C-C σ bonds (one from the single bond and one from each double bond) and 6 C-H σ bonds (2 on each terminal carbon, 1 on each internal carbon). It has 2 π bonds, one from each double bond.
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