Figure S1 Molecular electrostatic potential of TO2 monomers at a distance R directly above the T atom.

Figure S2 Electron density of TO2 monomers at a distance R directly above the T atom.

Figure S3 Amplitude of NBO π* orbital of SiO2 and GeO2 monomers at a distance R directly above the T atom.

Figure S4 Shifts of electron density in two different planes occurring when GeO2 interacts with NCH. Brown and yellow regions indicate respectively gain and loss of density, shown on the ±0.003 au contours.

Figure S5 Contour plot of MEP of GeO2··NCH dyad. Heavy blue line indicates ρ = 0.001 surface.

Figure S6 Contour plot of (A) density and (B, C) MEP of GeO2··2NCH triad. Positive and negative MEP shown in blue and red, respectively. Heavy blue line indicates ρ = 0.001 surface.