Question

CH3-CH-CH2-CH-CHO-BR​

Answer 1

Answer:

The presence of an aldehyde group () suggests an aldehyde, so we use an -al suffix

The presence of an aldehyde group () suggests an aldehyde, so we use an -al suffixThe carbon skeleton contains 4 carbons with a double bond, thus, it is an alkene (in this case, butene)

The presence of an aldehyde group () suggests an aldehyde, so we use an -al suffixThe carbon skeleton contains 4 carbons with a double bond, thus, it is an alkene (in this case, butene)Numbering starts from the carbonyl carbon in the aldehyde group (highest priority in the chain), which means that the closest carbon of the double bond falls squarely on C-2

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