Why 1 3 butadiene is more stable than 1 4 pentadiene?
Answers
Answer:
There is no such things as 1,4-butadiene. The numbering tells you whic carbon the double bond starts at. So 1 tells you the first double bond is between carbons 1 and 2 (doesn’t matter which end of the four-carbon chain you start counting at: the answer will be the sameh). The next double bond can’t start at the 2 position (this would be an allene not a diene) which means the only place left for the second double bond is between the 3 and 4 carbons, i.e it starts at the 3 position. Hence 1,3-butadiene, or just butadiene as there isn’t any choice.....
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Answer:
) s-trans is more stable because there is less steric interaction between the methyl and hydrogens unlike in s-cis. 4) trans-1,3-pentadiene because it is a conjugated diene, which is more stable than an isolated diene such as 1,4-pentadiene. This is due do many reasons such as resonance energy and hybridization.