Which of the following overlaps is incorrect (assuming Z-axis is internuclear axis) ? (A) 2py + 2py — Chemical Bonding Chemistry Question

💡 Solution & Explanation

Step 1: Identify the orientation of the orbitals with respect to the Z-axis, which is the internuclear axis. Step 2: Analyze each overlap: (B) 2px + 2px overlaps sideways to form a pi-bond, not a sigma-bond; (C) 3dxy + 3dxy face-to-face overlap forms a delta-bond, not a pi-bond; (D) 2s + 2py has zero net overlap, so no bond is formed. Step 3: Therefore, overlaps B, C, and D are incorrect, which matches option (d).