Alkenes and Alkynes - URI Department of Chemistry
Alkenes and Alkynes - URI Department of Chemistry
Alkenes and Alkynes - URI Department of Chemistry
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10/29/2010Electrophilic Addition Reactions <strong>of</strong> <strong>Alkenes</strong>Alternatively, we might write the same reaction in a format toemphasize that 2-methylpropene is the reactant whosechemistry is <strong>of</strong> greater interest. The second reactant, HCl, isplaced above the reaction arrow together with notes aboutsolvent <strong>and</strong> reaction conditions:Electrophilic Addition Reactions <strong>of</strong> <strong>Alkenes</strong><strong>Alkynes</strong> also undergo electrophilic addition reactions• Reactivity is substantially less than that <strong>of</strong> alkenes7.7 Orientation <strong>of</strong> Electrophilic Addition:Markovnikov’s RuleRegiospecific reactions - reactions where only one <strong>of</strong>two possible orientations occursMarkovnikov’s Rule (Vladimir Markovnivov,1869)• In the addition <strong>of</strong> HX to an alkene, the H attaches to thecarbon with fewer alkyl substituents <strong>and</strong> the X attaches tothe carbon with more alkyl substituents6
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