Antibonding molecular orbitals can be used to make bonds to other atoms in a molecule. For example, metal atoms can use appropriate d orbitals to overlap with the T, orbitals of the carbon monoxide molecule. This is called d – T backbonding. (a) Draw a coordinate axis system in which the y -axis is vertical in the plane of the paper and the x -axis horizontal. Write ªM" at the origin to denote a metal atom. (b) Now, on the x -axis to the right of M, draw the Lewis structure of a CO molecule, with the carbon nearest the M. The CO bond axis should be on the x -axis. (c) Draw the CO T, orbital, with phases (see the "Closer Look" box on phases) in the plane of the paper. Two lobes should be pointing toward M. (d) Now draw the dy orbital of M, with phases. Can you see how they will overlap with the T, orbital of CO? (e) What kind of bond is being made with the orbitals between Mand C, o or n?(f) Predict what will happen to the strength of the CO bond in a metal-CO complex compared to CO alone.

Antibonding molecular orbitals can be used to make bonds to other atoms in a molecule. For example, metal atoms can use appropriate d orbitals to overlap with the T, orbitals of the carbon monoxide molecule. This is called d – T backbonding. (a) Draw a coordinate axis system in which the y -axis is vertical in the plane of the paper and the x -axis horizontal. Write ªM" at the origin to denote a metal atom. (b) Now, on the x -axis to the right of M, draw the Lewis structure of a CO molecule, with the carbon nearest the M. The CO bond axis should be on the x -axis. (c) Draw the CO T, orbital, with phases (see the "Closer Look" box on phases) in the plane of the paper. Two lobes should be pointing toward M. (d) Now draw the dy orbital of M, with phases. Can you see how they will overlap with the T, orbital of CO? (e) What kind of bond is being made with the orbitals between Mand C, o or n?(f) Predict what will happen to the strength of the CO bond in a metal-CO complex compared to CO alone.

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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Concept explainers

Quantum Mechanical Treatment of the Valence Bond Theory

Quantum mechanical treatment of valence bond theory refers to the relationship established between the quantum mechanical theory and the valence bond theory to describe the chemical bonding in a particular molecule.

Question

Antibonding molecular orbitals can be used to make bonds to other atoms in a molecule. For example, metal atoms can
use appropriate d orbitals to overlap with the T, orbitals of the carbon monoxide molecule. This is called d – T
backbonding. (a) Draw a coordinate axis system in which the y -axis is vertical in the plane of the paper and the x -axis
horizontal. Write ªM" at the origin to denote a metal atom. (b) Now, on the x -axis to the right of M, draw the Lewis
structure of a CO molecule, with the carbon nearest the M. The CO bond axis should be on the x -axis. (c) Draw the CO
T, orbital, with phases (see the "Closer Look" box on phases) in the plane of the paper. Two lobes should be pointing
toward M. (d) Now draw the dy orbital of M, with phases. Can you see how they will overlap with the T, orbital of CO?
(e) What kind of bond is being made with the orbitals between Mand C, o or n?(f) Predict what
will happen to the strength of the CO bond in a metal-CO complex compared to CO alone.

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