Dinitrogen-derived (diarylboryl)diazenido complexes with differing coordination to the thallium cation.

To prepare N 2 -derived cationic boryldiazenido-tungsten complexes as models of semimetallic metal-borinium frustrated Lewis pairs activating N 2 , we have attempted halide abstraction from trans -(diarylboryl)diazenido-halo-tungsten complexes. Reactions with Tl + led to adducts in which coordination of the cation differs depending on the boryldiazenide substituents and the ancillary ligand. Chloride scavenging was not observed.