Consider the following sketches (1-8) representing molecular orbitals (MOS) obtained by combining the sand patomic orbitals on two atoms. As usual, the white and grey lobes correspond to the opposite signs of the wavefunctions. (1) 1,5 3,7 88 Which of the above sketches correspond to bonding sigma MOS? 1,2 1, 2,8 (2) 4,5,6 (3) (8)

Consider the following sketches (1-8) representing molecular orbitals (MOS) obtained by combining the sand patomic orbitals on two atoms. As usual, the white and grey lobes correspond to the opposite signs of the wavefunctions. (1) 1,5 3,7 88 Which of the above sketches correspond to bonding sigma MOS? 1,2 1, 2,8 (2) 4,5,6 (3) (8)

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 26P: Following the pattern of Figure 6.21, work out the correlation diagram for the BeN molecule, showing...

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The B2 molecule is paramagnetic; show how this indicates that the energy ordering of the orbitals in this molecule is given by Figure 6.18a rather than 6.18b.
Following the pattern of Figure 6.21, work out the correlation diagram for the BeN molecule, showing the relative energy levels of the atoms and the bonding and antibonding orbitals of the molecule. Indicate the occupation of the MOs with arrows. State the order of the bond and comment on the magnetic properties of BeN.
The ground-state electron configuration of He; is (o,1s)'(0,1s)' . Calculate the bond order of Hez. (A) 3/2 (B) 1/2 (С) 1 (D) -1/2
The ground-state electron configuration of He; is (o,1s)´(0,1s)' . Calculate the bond order of He;. (A) 3/2 (B) 1/2 (C) 1 (D) -1/2
Consider the following sketches (1-8) representing molecular orbitals (MOS) obtained by combining the sand patomic orbitals on two atoms. As usual, the white and grey lobes correspond to the opposite signs of the wavefunctions. (1) 88 Which of the above sketches correspond to o (sigma) character MOS? Count both o and o* as sigma character. 1,2 1, 2, 4, 5, 6, 8 3,7 4,5,6 (8) 1, 2,8
Consider the following sketches (1-8) representing molecular orbitals (MOs) obtained by combining the sand p atomic orbitals on two atoms. As usual, the white and grey lobes correspond to the opposite signs of the wavefunctions. (4) (1) (5) 1, 2, 7, 8 3, 4, 5, 6 88 Which of the above sketches correspond to antibonding sigma MOS? 3,7 4, 5, 6 (2) 1, 7, 8 (3) 88 (8)
Consider the following sketches (1-8) representing molecular orbitals (MOs) obtained by combining the sand p atomic orbitals on two atoms. As usual, the white and grey lobes correspond to the opposite signs of the wavefunctions. (2) (1) ∞ (5) 1, 2, 7, 8 88 Which of the above sketches correspond to π (pi) character MOS? Count both T and * as pi-character 3, 4, 7, 8 3,7 1, 7, 8 (3) 88 4, 5, 6 (8)
(b) Calculate the bond order in the peroXiue lon 0) (c) Which of these species has the stronger bond? Og (superokide) is Stronger 8) Draw three canonical Lewis structures for ozone. it 9) In a quantum mechanical calculation on ethene, 116 atomic orbital basis functions were used. After symmetry adapting these functions, there were 23 functions of a, symmetry, 7 functions of b, symmetry, 11 functions of b2, symmetry, 17 functions of b3g symmetry, 7 of a, symmetry, 23 of bu symmetry, 17 functions of b2u symmetry, and 11 of b3u symmetry. (a) How many molecular orbitals will be formed in the calculation? (b) How many of these molecular orbitals will be occupied in the ground state? (c) How many of the molecular orbitals will be of ungerade symmetry?
The ground-state electron configuration of He; is (o,1s)' (0,1s)* . Calculate the bond order of Hez. (A) 3/2 (В) 1/2 (С) 1 (D) -1/2
Consider the following sketches (1-8) representing molecular orbitals (MOs) obtained by combining the sand patomic orbitals on two atoms. As usual, the white and grey lobes correspond to the opposite signs of the wavefunctions. (3) 88 88 Which of the above sketches correspond to antibonding MOs? (1) (5) 1,7,8 1,2,7,8 3,4,5,6 4,5,6 3,7 (2) (4)
Use the References to access important values if needed for this question. Consider the fluorine molecule and the F," molecular ion: (a) Give the bond order of each species. If a fraction is needed, use a decimal number. Bond order F2 Bond order F2= (b) Predict which species should be paramagnetic. Is F2 paramagnetic? | Is F2 paramagnetic? (c) Predict which species has the greater bond dissociation energy. The species with the largest bond dissociation energy is: a. F2 b. F2
The diagram that follows shows the highest-energy occupiedMOs of a neutral molecule CX, where element X is in thesame row of the periodic table as C. (a) Based on the numberof electrons, can you determine the identity of X? (b) Wouldthe molecule be diamagnetic or paramagnetic? (c) Considerthe π2p MOs of the molecule. Would you expect them to havea greater atomic orbital contribution from C, have a greateratomic orbital contribution from X, or be an equal mixtureof atomic orbitals from the two atoms?