Which among the following molecules is not perfect flat? — Chemical Bonding Chemistry Question

💡 Solution & Explanation

Step 1: Analyze the electronic effects of Fluorine in O2F2 compared to Hydrogen in H2O2. According to Bent's Rule, more electronegative substituents attract s-character, leaving more p-character in the O-F bonds. Step 2: Consequently, the O-O bond in O2F2 has increased s-character, making it exceptionally short (approx 1.22 Å, similar to the double bond in O2). In contrast, H2O2 has a normal single O-O bond with approx 1.48 Å length. Step 3: Therefore, the O-O bond lengths in H2O2 and O2F2 are 1.48 Å and 1.22 Å respectively, matching option (b).