Recent Advances in Direct Synthesis of Organometallic and Coordination Compounds

Chandrashekhar, Vidyasagar C.; Flores, Blanca; Jiménez-Pérez, Vı́ctor M.

doi:10.1016/b978-0-12-811061-4.00002-5

Cited by 1 publication

(1 citation statement)

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“…[17] This approach attracts attention due to unusual experimental technique, less synthetic time, low cost, and convenient control over the whole process. [18] First report of obtaining new compounds from zero-valent metals with assistance of electric current dates back to 19 th century. [19] Later there were reports of possibility to synthesize new coordination compounds from pure metals in gaseous phase, [20] in solutions in the presence of oxidants, as well as mechanochemically.…”

Section: Introductionmentioning

confidence: 99%

Direct Synthesis of Spin‐Crossover Complexes: An Unexpectedly Revealed New Iron‐Triazolic Structure

et al. 2020

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Spin‐crossover complexes form one of the biggest families of switchable compounds. Here we show a new way to obtain spin‐crossover materials by direct synthesis from metallic iron. Four complexes of FeII with 4‐R‐1,2,4‐triazoles have been synthesized by a direct metal oxidation: [Fe(NH2trz)3]SO4, [Fe(NH2trz)3](BF4)2 and two polymorphs of [Fe(Htrz)2(trz)]BF4. Surprisingly high quality of PXRD pattern of [Fe(NH2trz)3]SO4 allowed to perform Rietveld refinement and obtain reliable crystal structure of the latter. All compounds have been studied by magnetic susceptibility measurements, optical reflectivity, differential scanning calorimetry and Raman spectroscopy. Importantly, spin‐crossover characteristics of the complexes obtained by this unusual method are preserved, thus revealing a new effective approach of “direct synthesis” towards switchable coordination compounds.

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