Ochem: alyknes/halogens
Started by 123321
If you're talking about the common dihalides (Br2, Cl2) , they will usually reduce an alkyne to the trans alkene via anti addition (remember we form a cyclic halonium ion intermediate, and we always attack that from the opposite side).
Of course if you had add two equivalents/excess dihalide it doesn't matter, since it will be an alkane at that point.
Of course if you had add two equivalents/excess dihalide it doesn't matter, since it will be an alkane at that point.
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Halogens will add trans...actual term is anti.....to both alkenes and alkynes as the major product under most conditions. For the DAT exam.....go anti !!!!
Hope this helps!
Dr. Romano
