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Markovnikov’s rule

Mar·kov·ni·kov's rule [ maar kòvni kovz rl ]


noun 
Definition:
 
rule for addition reactions: the empirical rule that when an alkene combines with a hydrogen halide, the halogen atom becomes attached to the double-bonded carbon atom connected to the least number of hydrogen atoms

[Early 20th century. After Vladimir V. Markovnikov (1838-1904), Russian chemist]
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