H. Imai et al., MOLECULAR SPIN LADDER IN THE NI(DMIT)(2) (DMIT=1,3-DITHIOL-2-THIONE-4,5-DITHIOLATE) SALT WITH A NITRONYL NITROXIDE CATION, Physical review. B, Condensed matter, 54(10), 1996, pp. 6838-6840
The crystal and magnetic structure of the 1:1 salt of Ni(1,3-dithiol-2
-thione-4,5-dithiolate)(2) anionic radical and [Ni(dmit)(2)] p-N-ethyl
pyridinium alpha-nitronyl nitroxide (p-EPYNN) cationic radical have be
en studied. Ferromagnetic interaction with J/k(g)=0.16 K has been foun
d to operate in the one-dimensional p-EPYNN chains, while the first mo
lecular antiferromagnetic spin ladder has been found to form in the Ni
(dmit)(2) chains.