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Schlagwörter:
Iron(II); Magnetic measurements; Spin crossover; Tetrazole; Vibrational spectroscopy
Zusammenfassung:
A series of 1-(tetrazol-1-yl)alkanes [ntz] with n = 1- 4 were synthesised as ligands for iron(II) spin crossover complexes. Within this series 1-(tetrazol-1-yl) butane [4tz] was prepared for the first time, whereas 1-(tetrazol-1-yl) methane [1tz], 1-(tetrazol-1-yl) ethane [2tz], 1-(tetrazol-1-yl) propane [3tz] and the [hexakis(ntz) iron(II)] bis(tetrafluoroborate)complexes were prepared according to the literature. Aiming for a comparative study we characterized all four compounds by XRPD, magnetic susceptibility measurements, Fe-57-Moessbauer spectroscopy and IR spectroscopy. [Fe(4tz)(6)](BF4)(2) yielded appropriate single crystals and an X-ray structure of the new compound [Fe(4tz)(6)](BF4)(2) is presented. The magnetic and structural properties of all [Fe(ntz)(6)](BF4)(2) are compared and discussed. (C) 2007 Elsevier B.V. All rights reserved.