To determine resonance energy of benzene, CDDT was combusted in a bomb calorimeter. Why is this...

To determine resonance energy of benzene, CDDT was combusted in a bomb calorimeter.

Why is this research (to determine resonance energy of benzene) relevant in chemistry, life or other scientific fields?

Solutions

Expert Solution

In Lewis formulas, electrons are paired between atoms to form covalent bonds. Each single bond is made by two valence electrons, localized between the two bonded atoms. Each double bond has two additional localized π electrons, while each triple bond has four additional π electrons (two pairs) between the bonded atoms.

In molecules or ions that have a combination of one or more single and multiple bonds, often the exact position of the respective bonds cannot be indicated by a single Lewis structure. The π electrons appear to be in an intermediate position. To solve this problem, the concept of resonance is used, and the molecule is represented by several contributing structures, each showing a possible distribution of single and multiple bonds. The actual structure has a lowered overall energy and an intermediate bond order.

queen_honey_blossom answered 1 year ago

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