Question

7. Which of the following alkenes will evolve the MOST heat during hydrogenation over Pd(0)? 8. (3 pts) a. Draw the arrows that show the flow of electrons during the reaction of Cl2 with cis-2- butene leading to formation of the Reactive Intermediate. b. In the labeled box, provide the structure of the Reactive Intermediate initially formed upon reaction of Cl2 with cis-2-butene. c. Draw the arrows that show the flow of electrons during collapse of the Reactive Intermediate. d. In the labelled box, provide the structure of one of the enantiomers of the Product formed by reaction of Cl2 with cis-2-butene. Hạc – Cha CI Reactive Intermediate Product Enantiomer

Answer 1

The most Stable alkenes have the Smalueg neat of nydTodenation ag they oore atread y at a lowenergy devel The east stable alkene wil hale the nighest heat hdcho genatin Moye subifued alkena ig mofe teble than s subgtltuted due to hPep Coniugation. So, Magt subitutec alkene will have ow heat of hydo genation So, f de af heat of hyd08enation H H (d) (ay (b) eNoive MOST heatof hyasagenation So b osld f tsons i mofe Stable than Between Csi.Scanned with teie hindTonee iand Samtanner

? The most stable alkenes have the smallest heat of hydrogenation as they are already at a low energy level. 2 The least stable alkene will have the highest heat of hydrogenation ubstituted alkene is more stable stituted due to hyper conjugation.. than less substituted due to So, Most substituted alkene will have low heat of hydrogenation. so order of heat of hydrogenation is. cas (d). " (b), Ef . (b So, 6) evolve MOST heat of hydrogenation on band of Between troms is more band of a stable than Cseisandue to isterie hindrance.