00:01
In this problem, we're asked to evaluate the stereoisomers obtained from each of the following reaction paths of 2 butyne.
00:08
So, starting at the top, we first react with hydrogen in lindler's catalyst.
00:12
Poison catalyst reactions always result in cis alkenes.
00:16
So we have cis tube butine from that.
00:19
And then a reaction with bromine and dichloromethane will add two equivalents of bromine to the compound.
00:26
But we have to remember that this halogenation reaction is always resultant in anti -addition across the double bond.
00:36
And so we might have one come out of the page and the other go into the page, but we would also have its mirror image, also known as its anantiumer form in a racemic mixture.
00:48
The second problem, we're asked first for the dissolving metal reduction, which results in a transalcine, and thus we might, draw again the carbons as planar, and we'll have anti -addition across the double bond, one bromine out, the other bromine into the page.
01:06
And we might consider what an antimer of this compound would look like...
