Fig. 4: Comparing the catalytic activities of different Al complexes and deuterium-labeling experiments.

a Synthesis of the pyridine-bridged dialuminium complex Al-4. b XRD structure of Al-4. c Comparison of the catalytic activities of Al-2, Al-3 and Al-4. d Deuterium-labeling experiments using D₃NBH₃ and H₃NBD₃.