Digallanes bonding

Table 3. Metal-metal bond lengths and torsion angles and -digallanes and their reduced monoanion derivatives...

Problem 12.5 See Fig. 12.3. Compare the Al-Al the Al-Ct and Al-Ht, bond distances in tetram-ethyldialane and the corresponding bond distances in digallane with the bond distances calculated... 

Electron Propagator Theory of Ionization Energies and Dyson Orbitals for p-Hydrido, Bridge-Bonded Molecules Diborane, Digallane, and Gallaborane... 

Dyson orbitals for digallane (Fig.s 7 12) display nodal surfaces that resemble those of diborane. The radial nodes of Ga 4p functions can be discerned in Fig.s 7-10. Prominent positive and negative amplitudes are shifted toward hydrogen nuclei. Direct bonding or antibonding relationships between Ga atoms are not as strong as those between B atoms in the b2 and big orbitals. 

Smaller energy separations between ionization energies and reduced direct interactions between nonhydrogen atoms suggest that bonding in digallane has more ionic character. 

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