Valence Bond Theory || 4 Marks in 10 Minutes For NEET Exam
Competition Wallah・2 minutes read
Physics Valhalla offers quick lessons and question-solving sessions on covalent bond formation, emphasizing electron sharing and bond energy release. The text details the importance of proper orbital alignment and phase overlap in creating strong sigma and pi bonds for increased stability.
Insights
- When atoms form covalent bonds, the sharing of electrons from their balance cells leads to the creation of bond energy, releasing energy as the atoms come closer. The relationship between potential energy and internuclear distance, illustrated through a graph, showcases the crucial bond length necessary for maintaining the bond.
- The formation of molecular orbitals through phase overlap, whether positive or negative, determines bond formation. Positive-positive and negative-negative overlaps facilitate bond creation, while positive-negative overlaps hinder it. Sigma bonds, resulting from molecular axis overlap, are stronger than pi bonds due to better lobe merging, emphasizing the significance of proper alignment, as seen in scenarios involving dx a and py orbitals at a 39-degree angle, preventing bond formation.
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