Group orbitals dicoordinated atoms

Figure 3.16. Group orbitals for a linear dicoordinated atom.

Our choice of orientation of the a framework (as determined by the bent coordination of the dicoordinated C atom and the intended C— a bond) in the xy plane (the plane of the page) determines the orientation of the valence group orbitals. These should be drawn on the diagram beside the appropriate energy levels, each superimposed on a separate sketch of the a framework, and labelled fully, as shown in Figure 3.21. All of the orbitals should be drawn about the same size, since their weights are equal before the interaction (their coefficients are 1). 

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