Hybridization of and d Orbitals

Note that the superscripted numbers in hybrid orbital notation are used to designate the number of atomic orbitals that have undergone hybridization. When the superscript is 1, it is not shown (analogous to the subscripts in chemical formulas). 

Hybridization of the s orbital, the three p orbitals, and one of the d orbitals yields hybrid orbitals that are designated sp d. After placing the five electrons in the five hybrid orbitals, we can rationalize the formation of five bonds in the molecule  

Mixing of one s orbital, three p orbitals, and one d orbital to yield five sp d orbitals 

The sp d orbitals have shapes similar to those we have seen for the sp, sp. and sp hybrid orbitals that is, one large lobe and one small lobe. In addition, the five hybrid orbitals 

CHAPTER 9 Chemical Bonding II Molecular Geometry and Bonding Theories 

---