Figure 4
The correlation between equatorial and axial Zn—N bond lengths for which the distance between an H atom of an axial pyridyl group and the closest equatorial aromatic π-system is lowest. Filled circles: this work; filled squares: compound (IV), [Zn(tpen)]2+ (Mikata et al., 2005). Points for the cations in special positions are shown as open circles for (I) and as squares for (IV). |