Abstract
Novel mononuclear Fe(II) complexes of tris(pyrazol-1-yl)methane [Fe{HC(pz) 3} 2] 2+ with SiF 6 2 - and p-sulfonatothiacalix[4]arene (TCAS 4−) as counterions were obtained. The compounds were characterized by magnetic susceptibility method, IR and UV–Vis spectroscopy. The structure of [Fe{HC(pz) 3} 2]SiF 6 has been analyzed by single-crystal X-ray diffraction. The 1H NMR spectroscopy measurements of [Fe{HC(pz) 3} 2] 2(TСAS) in aqueous solution reveal the outer sphere inclusion of [Fe{HC(pz) 3} 2] 2+ into the cyclophanic cavity of TCAS 4−. The temperature induced spin-crossover 1А 1 ⇔ 5Т 2, accompanied by thermochromism, has been revealed from the temperature dependence of μ eff and IR spectra for both complexes. The comparative analysis of magnetochemical and spectroscopy data elucidates the effect of the cyclophanic counterion on the physico-chemical properties of Fe(II) complex.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
