866917-02-4Relevant articles and documents
Syntheses, spectra, crystal structures and magnetic properties of molecular solids based on the M(mnt)2- ion (M = Ni, Pt)
Ni, Chun-Lin,Li, Yi-Zhi,Dang, Dong-Bin,Gao, Song,Ni, Zhao-Ping,Tian, Zheng-Fang,Wen, Li-Li,Meng, Qing-Jin
, p. 1669 - 1676 (2005)
Two new ion-pair complexes [1-(4′-nitrobenzyl)-4-aminopyridinium]- bis(maleonitriledithiolato)nickel ([NO2BzPyNH2][Ni(mnt) 2]) (1) and [1-(4′-nitrobenzyl)-4-aminopyridinium]- bis(maleonitriledithiolato)platinum ([NO2BzPyNH2][Pt(mnt) 2]) (2) have been prepared and characterized by elemental analyses, IR, electronic and MS spectra, single crystal X-ray diffraction and magnetic susceptibility. 1 and 2 crystallize in the monoclinic space group P2 1/c, a = 12.331(3) ?, b = 26.937(6) ?, c = 7.322(2) ?, V = 2349.0(10) ?3, Z = 4 for 1, and a = 10.600(3) ?, b = 8.376(2) ?, c = 27.089(7) ?, V = 2362.2(11) ?3, Z = 4 for 2. The Ni(III) ions of 1 form a 1D zigzag chain within a Ni(mnt)2- column, while 2 is a dimer. Magnetic susceptibility and DSC measurements for 1 in the temperature range 2.0-300 K show the occurrence of an unusual magnetic phase transition around 160 K, and an antiferromagnetic interaction in the high-temperature phase (HT) and a spin gap in the low-temperature phase (LT), while 2 is diamagnetic.
