Magnetic behavior within a new Ni(mnt)2-based molecular solid containing 1-(2′-fluorobenzyl)isoquinolinium

A novel molecular solid, [OFBzIQl][Ni(mnt)2] (1), where [OFBzIQl]+ = 1-(2′-fluorobenzyl)isoquinolinium and mnt2− = maleonitriledithiolate, forms 1D column of alternating between cations and anions via π⋯π stacking interaction between Ni(mnt)2 plane and isoquinoline ring, and exhibits a magnetic constant transition from ferromagnetic to antiferromagnetic around 35 K as the temperature is lowered.