Extraordinary aluminum coordination in a novel homometallic double complex salt

We have characterized a novel aluminum-based homometallic double complex salt, incorporating discrete octa-coordinated cationic [Al(G3)2]3+ and hexa-coordinated anionic [Al(TfO)4(OH)2]3− complexes (G3 = triglyme, TfO = trifluoromethanesulfonate). X-ray crystallography, Raman spectra, and DFT calculations demonstrate extraordinary weak Al3+ coordination in [Al(G3)2]3+.