Читать книгу Foundations of Chemistry - Philippa B. Cranwell - Страница 102

If there are five areas of electron density around the central atom, the molecule adopts a trigonal bipyramidal shape, as shown in Figure 2.17 for phosphorus pentachloride, PCl₅. The angle in the plane around the phosphorus atom between each of the equatorial bonds is 120°, and the angle between the equatorial bonds and the axial bonds is 90°.

Figure 2.17 (a) Bonding angles in a trigonal bipyramidal molecule; (b) phosphorus pentachloride, PCl₅ superimposed into a trigonal bipyramid.