Ethylpyridinium radical cation

Concerning molecule-based magnets, the first spin-ladder was synthesized (/ -EPYNN)[Ni (dmit)2] (/ -EPYNN = / -7V-ethylpyridinium o-nitronyl nitroxide). Within the crystal lattice, the radical cation /7-EPYNN units are arranged in ID chains with ferromagnetic interactions. The chains of [Ni(dmit)2] moieties in the ladder formation exhibit coexistent antiferromagnetic interactions.1031,1032... 

Besides the electrical conductivity, a number of other applications of [M(dmit)2] have been investigated. For example, molecular-based magnets, such as the spin ladder compound p-EPYNN][Ni(dmit)2] [p-FFYNN]" " = p-N-ethylpyridinium a-nitronyl nitroxide) was reported in 1996. In the crystal, the radical cationic molecules, p-EPYNN, form one-dimensional chains with ferromagnetic interactions, while the chains of [Ni(dmit)2] monovalent anions, in a ladder formation, exhibit antiferromagnetic interactions. The magnetisation is explained by the sum of them. 

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