The bonding in the hexahalogenogallate(II) ions with an ethane-like structure studied by NQR

The nuclear quadrupole resonance (NQR) spectra due to 35Cl, 81Br and 69Ga have been recorded for L2Ga2X6 [L  (CH3)4N and (C2Hs)4N; X  Cl and Br]. The NQR frequencies of the halogen in these compounds are considerably lower than those in Ga(III) compounds. The 69Ga NQR signals at 77 K are observed in the range 22–24 MHz. The electron distributions on the Ga and halogen atoms have been calculated according to the Townes-Dailey theory. The results show that the charge on each atom in the hexahalogenogallate(II) anions is independent of the cation but depends on the halogen.