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identical in shape to ,ySP31, shown in Figure  1.11, but each oriented toward a dif-
                 ferent one of the [our  hydrogen atoms:
                     The actual  correct  mathematical  forms  are  not  exactly  as  indicated  in
                Equations  1.6. The sign  of each  term, which  is  the  important quantity for our
                present purpose, is correctly represented there, but each orbital function must be
                multiplied by a coefficient. The method of finding the proper coefficients for any
                desired geometry is given in Appendix 1 to this chapter.



                Figure 1.11 The formation  of  an sp3  hybrid  by  adding together  the  four  valence  atomic
                           orbitals.  Orbital shapes and  locations  of  the  nodes  are approximate  in  these
                           diagrams.  For  a  more  accurate  description,  see  Wiberg,  Physical  Organic
                           Chemistry,  pp. 29-33.
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