Syntheses, crystal structures, and magnetic properties of two new 1D molecular solids based on Ni(mnt)2 ion

Two novel ion-pair complexes, 1-(4′-bromo-2′-fluorobenzyl)isoquinolinium-bis(maleonitriledithiolato)nickel(III), [BrFBzIQl] · Ni(mnt)2 · 0.5MeCN (1) and 1-(4′-bromo-2′-flouorobenzyl)-quinolinium-bis(maleonitriledithiolato)nickel(III), [BrFBzQl] · Ni(mnt)2 (2), have been characterized structurally and magnetically. The changes of coupling constants were observed in these two complexes at 85 K for 1 and 70 K for 2. It is interesting that 1 undergoes a transition from antiferromagnetic to ferromagnetic phase and 2 does counter to that of 1.