Single Choice

Which is correct statement about $$\sigma -$$ and $$\pi -$$ molecular orbitals? Statements are (i) $$\pi -$$ bonding orbitals are ungerade (ii) $$\pi -$$ antibonding orbitals are ungerade (iii) $$\sigma -$$ antibonding orbitals are gerade

A(i) only
Correct Answer
B(ii) and (iii) only
C(iii) only
D(ii) only

Solution

The symmetry of molecular orbital is detemined by rotating the orbitals about a line perpendicular to it. If the sign of the lobes remains the same, the orbital is gerade and if the sign changes, the orbital is ungerade. $$\pi$$ bonding orbitals are ungerade whereas $$\pi$$ antibonding orbitals are gerade. Also $$\sigma$$- antibonding orbitals are ungerade

SIMILAR QUESTIONS

Chemical Bonding

When two atomic orbitals combine, energy of bonding molecular orbital is lowered by $$x$$ while that anti bonding molecular orbital is raised by $$y$$. Then:

Chemical Bonding

Which of the following representation of wave functions of molecular orbitals and atomic orbitals are not correct?

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