CHE 375 F11 Practice Questions Ex 3

CHE 375 F11 Practice Questions Ex 3 - CHE 375 Fall 11...

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CHE 375 Fall 11 Practice Questions Exam 3 1. a) Is there a symmetry element that accomplishes the following transformation? If yes, show this symmetry element. (5) 5 1 2 3 4 6 S Cl Cl F F F F 5 2 1 3 6 4 S Cl Cl F F F F b) Which, if any, of the valence orbitals of sulfur (2s and 2p) have A 1 symmetry? (5) S Cl Cl F F F F z x y
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2. Consider the molecular orbitals of [FH 2 ] + as a model for the water molecule. The symmetry subscripts refer to the plane of the molecule. F H H + z x y F 2H
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a) Circle and label all atomic and ligand group orbitals with B 1 symmetry. (5) b) In the diagram on the first page draw all molecular orbitals . (6) c) Label all molecular orbitals with A 1 and B 2 symmetry. (5) c) Add all electrons in the molecular orbitals. (2) d) Is the highest occupied orbital bonding or nonbonding (lone pair)? (Circle one.) (2) e) The molecular ion [FH 2 ] + is isoelectronic with the water molecule. Nevertheless the molecular orbital treatment of water is more complicated. Why and in which way? (5)
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This note was uploaded on 12/12/2011 for the course CHE 375 taught by Professor Andreamyer during the Fall '11 term at SUNY Stony Brook.

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CHE 375 F11 Practice Questions Ex 3 - CHE 375 Fall 11...

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