Molecular shape trigonal bipyramidal arrangement

Molecular Shapes with Five Electron Groups (Trigonal Bipyramidal Arrangement)... 

T shape A molecular shape caused by the presence of two equatorial lone pairs in a trigonal bipyramidal arrangement (AX3E2). (317)... 

Figure 10.8 The four molecular shapes of the trigonal bipyramidal electron-group arrangement.

Three of the five basic molecular shapes are linear, trigonal planar and tetrahedral. Table 4.9 shows the arrangement of the electron pairs (charge centres) that results in minimum repulsion and the basic shapes of the molecules. The two other basic shapes adopted by molecules, trigonal bipyramidal and octahedral, are discussed in Chapter 14. 

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