Isolation and structural characterization of eight-fold protonated octacyanometallates [M(CNH)8]4+ (M=MoIV,WIV) from Superacids.

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2020
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Abstract
Octacyanometallates K 4 [Mo(CN) 8 ] and K 4 [W(CN) 8 ] are completely protonated in superacidic mixtures of anhydrous hydrogen fluoride and antimony pentafluoride. The resulting hydrogen isocyanide complexes [Mo(CNH) 8 ] 4+ [SbF 6 ] - 4 and [W(CNH) 8 ] 4+ [SbF 6 ] - 4 are the first examples of eight-coordinate homoleptic metal complexes containing hydrogen isocyanide (CNH) ligands. The complexes were crystallographically characterized, revealing hydrogen-bonded networks with short N … H … F contacts. Low-temperature NMR measurements in HF confirmed rapid proton exchange even at -40 °C. Upon protonation, ṽ(C≡N) increases of about 50 cm -1 which is in agreement with DFT-calculations.
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sellin2020isolationangewandte Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Sellin, Malte;Marvaud, Valérie;Malischewski, Moritz;
Journal angewandte chemie (international ed in english)
Year 2020
DOI
10.1002/anie.202002366
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