TABLE 6 is near here
The electron density, ρ (b), at the bond critical point is used to describe the strength of a bond, where the larger the value ofρ (b), the stronger the bond. In dimer 2 (see Figure 5) the intermolecular halogen bond of I1…I18 is the strongest withρ (b) = 0.008 au. In dimer 3 the halogen bonds of I2…C27(π) and I17…C12(π)) were strongest; theirρ (b) was 0.007 au. In dimer 5 the I2…O25 bond was the strongest with a ρ (b) value of 0.01 au. In dimer 6 the I1…C33(π) interaction was the strongest and its ρ (b) was 0.008 au. In dimer 7b the I35…C16(π) bond was the strongest and its ρ (b) was 0.009 au. In dimer 8 the I12…O33 was the strongest and its ρ (b) was 0.015 au. The results concluded from the topological measures of interaction properties are coincident with the experimental results reported in Table 3.