[Synthesis, spectra and magnetic properties of ion-pair charge transfer complexes bis(1-(4-nitrobenzyl) pyridinium) bis(maleonitriledithiolato) cobaltate(II or III)].
Two new ion-pair charge transfer complexes, [NO2Py]x[Co(mnt)2](NO2Py = 1-(4-nitrobenzyl)pyridinium; mnt = male-onitriledithiolate; x = 1 or 2 for complex 2 or 1), were synthesized and characterized by element analysis(EA), electronic spray mass spactrum(ES-MS), infrared spectrum (IR) and reflection electrolic spectra. Variable temperature magnetic susceptibilities of the complexes in range of 77-300 K indicate that complex 2 exhibits diamagnetivity complex 2, and the magnetic behavior for complex 1 obeys modification Bleaney-Bowers equation, that is, chi m = [Ng2 mu B2/3k(T-theta)][1 + (1/3)exp(-2J/kT)]-1. The best fitting gives a good results: g = 2.392, 2J/k = 5.9 K, theta = -4.9 K and agreement factor R = 7.20 x 10(-9) (R = sigma (chi (i)obs-chi (i)calcd)2/sigma (chi (i)obs)2).
Zhang
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Department of Chemistry, Anqing Normal College, 246011 Anqing.
Ren
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