Markovnikov's rule states that when an asymmetrical reagent is added to a hydrogen halid, then the anion of the reagent will attach to the carbon atom including fewer hydrogen atoms.
Hexagonal Close Packed: Hydrogen Chloride
P Orbital Shape: Weak Acid Examples
The importance of the aldehyde group is more than the phenyl group, thus numbering will start from aldehydic carbon.
Therefore the correct IUPAC name of Ph−CH=CH−CHO is:
3-phenylprop-2-enal
What is anti-Markovnikov rule?
The anti-Markovnikov rule can be defined using the addition of hydrogen bromide to isobutylene in the presence of benzoyl peroxide or hydrogen peroxide. The response of HBr with substituted alkenes was prototypical in the analysis of free-radical additions.
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