27. Using the framework on the right, build the MO energy diagram for CN molecule by assigning C and N atoms to the proper side 2p and filling AO and labeling and filling MO orbitals. 2p B) Write electronic configuration of CN C) What is bond order of CN? D) Is this molecule paramagnetic or diamagnetic 2s 2s E) Arrange CN, CN* and CN' in order of increasing bond energy (weakest – first)

27. Using the framework on the right, build the MO energy diagram for CN molecule by assigning C and N atoms to the proper side 2p and filling AO and labeling and filling MO orbitals. 2p B) Write electronic configuration of CN C) What is bond order of CN? D) Is this molecule paramagnetic or diamagnetic 2s 2s E) Arrange CN, CN* and CN' in order of increasing bond energy (weakest – first)

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter6: Quantum Mechanics And Molecular Structure

Section: Chapter Questions

Problem 30P: The molecular ion HeH+ has an equilibrium bond length of 0.774 Å. Draw an electron correlation...

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Discuss the nature of the bonding in the nitrate ion (NO3) . Draw the possible Lewis resonance diagrams for this ion. Use the VSEPR theory to determine the steric number, the hybridization of the central N atom, and the geometry of the ion. Show how the use of resonance structures can be avoided by introducing a de-localized MO. What bond order is predicted by the MO model for the NO bonds in the nitrate ion?
The molecular ion HeH+ has an equilibrium bond length of 0.774 Å. Draw an electron correlation diagram for this ion, indicating the occupied MOs. Is HeH+ paramagnetic? When HeH+ dissociates, is a lower energy state reached by forming He+H+ or He++H ?
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(a) Using only the valence atomic orbitals of a hydrogenatom and a fluorine atom, and following the model ofFigure 9.46, how many MOs would you expect for the HFmolecule? (b) How many of the MOs from part (a) would beoccupied by electrons? (c) It turns out that the difference inenergies between the valence atomic orbitals of H and F aresufficiently different that we can neglect the interaction ofthe 1s orbital of hydrogen with the 2s orbital of fluorine.The 1s orbital of hydrogen will mix only with one 2p orbitalof fluorine. Draw pictures showing the proper orientationof all three 2p orbitals on F interacting with a 1s orbitalon H. Which of the 2p orbitals can actually make a bondwith a 1s orbital, assuming that the atoms lie on the z-axis?(d) In the most accepted picture of HF, all the other atomicorbitals on fluorine move over at the same energy into themolecular orbital energy-level diagram for HF. These arecalled “nonbonding orbitals.” Sketch the energy-level diagramfor HF using…
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