difference Between extended and cross resonance and extended and cross conjugation
Answers
Explanation:
In organic chemistry terms, it is used to describe the situation that occurs when π systems (e.g. double bonds) are "linked together". An "isolated" π (pi) system exists only between a single pair of adjacent atoms (e.g. C=C) An "extended" π (pi) system exists over a longer series of atoms (e.g. C=C-C=C or C=C-C=O.
Cross-conjugation is a special type ofconjugation in a molecule, when in a set of three Pi bonds only two pi-bonds interact with each other byconjugation, the third one is excluded from interaction. ... The type ofconjugation affects reactivity and molecular electronic transitions.
A cross- conjugated system has a double-bonded unit single-bonded to one of the middle atoms of another conjugated chain. On the other hand, a normal Page 37 conjugated system such as a polyene typically has alternating single and double bonds along consecutive atoms.
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