1 Figure 14.23 Heterogeneous Hydrogen catalysis. Mechanism for reaction of ethylene with hydrogen on a catalytic surface. Carbon H2 and C2H4 adsorb on metal surface. After H-H bond breaks, H atoms migrate along metal surface. One free H attaches to C2H4 to form C2H5 (ethyl group) intermediate. Second free H is about to attach to C2H5 intermediate to form C2Hg. Ethane, C2H6, desorbs from metal surface.
1 Figure 14.23 Heterogeneous Hydrogen catalysis. Mechanism for reaction of ethylene with hydrogen on a catalytic surface. Carbon H2 and C2H4 adsorb on metal surface. After H-H bond breaks, H atoms migrate along metal surface. One free H attaches to C2H4 to form C2H5 (ethyl group) intermediate. Second free H is about to attach to C2H5 intermediate to form C2Hg. Ethane, C2H6, desorbs from metal surface.
Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
Chapter15: Radical Reactions
Section: Chapter Questions
Problem 20CTQ
Related questions
Question
The first step in the heterogeneous
hydrogenation of ethylene is adsorption of the
ethylene molecule on a metal surface. One proposed explanation for the “sticking” of ethylene to a metal
surface is the interaction of the electrons in the C—C π
bond with vacant orbitals on the metal surface. (a) If this
notion is correct, would ethane be expected to adsorb to a metal surface, and, if so, how strongly would ethane bind
compared to ethylene? (b) Based on its Lewis structure,
would you expect ammonia to adsorb to a metal surface
using a similar explanation as for ethylene?
Transcribed Image Text:1 Figure 14.23 Heterogeneous
Hydrogen
catalysis. Mechanism for reaction
of ethylene with hydrogen on a
catalytic surface.
Carbon
H2 and C2H4 adsorb on
metal surface.
After H-H bond breaks, H atoms
migrate along metal surface.
One free H attaches to
C2H4 to form C2H5 (ethyl
group) intermediate.
Second free H is about to attach to
C2H5 intermediate to form C2Hg.
Ethane, C2H6, desorbs from
metal surface.
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