For the CCl 4 molecule, with its tetrahedral structure, there are only two types of distances: four bond distances C -Cl with r a = 1.7665(7) Å and l = 0.0502(4) Å, and six nonbonded distances Cl . . . Cl with r a = 2.8828(12) Å and l = 0.0721(3) Å. Substituting parameters for CCl 4 into Eqs. 27 and 28, we obtain the results shown in Figs. and.