Five 1: 1 salts of 3-X-1-methylpyridinium (X= benzoyl, acetyl, methoxycarbonyl, carboxy, and aminocarbonyl; abbreviated as Ben, Ace, Met, Car, and Ami, respectively) cations with a [Ni (dmit) 2]− anion ([Ben]+[Ni (dmit) 2]−(1),[Ace]+[Ni (dmit) 2]−(2),[Met]+[Ni (dmit) 2]−(3),[Car]+[Ni (dmit) 2]−(4), and [Ami]+[Ni (dmit) 2]−(5)) have been synthesized and characterized by single-crystal X-ray analysis and conductivity measurements. In the ...