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Reference.org
Markovnikov's rule
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<p>In <a href="/facts/Organic_chemistry/djxhxaNg">organic chemistry</a>, Markovnikov's rule or Markownikoff's rule describes the outcome of some <a href="/facts/Addition_reaction/LvIngK0g">addition reactions</a>. The rule was formulated by Russian chemist <a href="/facts/Vladimir_Markovnikov/Hg2NxIee">Vladimir Markovnikov</a> in 1870. </p>