Reduction of an alkyne to the double bond stage can yield a cis alkene or trans alkene (except in cases where triple bond is at the end of the chain ) Reduction of alknes with sodium or lithium in liquid `NH_(3)` yields predominantly trans alkene.

Hydrogenation of alkynes with Lindlar's catalyst or a nickel boride called `P_(2)` catalyst yeilds is alkene (as high as 98%)

If Pd/C/`H_(2)` is used in the absence of a catalyst poison, two equivlanet of `H_(2)` are added forming alkanes.

Select the correct statement(s)

Options

A. Trans form of vinylic anion is more stable
B. cis form of vinylic anion is more stable
C. Rate determining step occurs prior to the step in which vinylic anion reacts
D. Rate determing step ocurs afte vinylic anoins has reacted

Answer

A