The PdL2 thus generated enters into the catalytic cycle. Characterize each step of the mechanism below in terms of the fundamental reaction types that transition-metal complexes undergo. Give the oxidation state of the metal in each complex.

The PdL2 thus generated enters into the catalytic cycle. Characterize each step of the mechanism below in terms of the fundamental reaction types that transition-metal complexes undergo. Give the oxidation state of the metal in each complex.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

Macmillan Learnin
am
Pd
In the Heck reaction, an alkene is coupled to an aryl (Ar) bromide or aryl iodide with the aid of a Pd catalyst. The actual
catalytically active species is believed to be PdL2 (where L is tri-o-tolylphosphine ligand), which is formed by two
ligand dissociations:
F
G
The PdL₂ thus generated enters into the catalytic cycle. Characterize each step of the mechanism below in terms of the
fundamental reaction types that transition-metal complexes undergo. Give the oxidation state of the metal in each complex.
Pd
Br
H
Br
Ar
HBr
Pd + L
CH₂
A
Ar-Br
#CH₂
Pd
---->
E
H
Pd + L
Br
B
Ar
Br
H
Ar
CH
D
presented by Machman Leaminy
H₂C=CH₂
CH₂
Pd
Br
Pd
---->
C
Ar
Br
+ L

Ⓒ Macmillan Learning
What is oxidation state of B?
What is oxidation state of C?
What is oxidation state of D?
What is oxidation state of E?
What is oxidation state of F?
What is oxidation state of G?
The reaction of B to C is:
The reaction of C to D is:
The reaction of D to E is:
The reaction of E to F is:
The reaction of F to G is:
The reaction of G to A is:

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