Mössbauer Spectroscopy of Antimony Compounds

The chemistry of the s- and p-block elements with 2,2′:6′,2′′-terpyridine ligands

“…20,21 The heavier homologues, i.e., As and Sb, feature a rich coordination chemistry with tpy ligands; in the case of the latter, structure elucidation is enabled by Mößbauer spectroscopy (similar to the aforementioned complexes with Sn II /Sn IV ions, Section 4). 324 However, a practical use of As-or Sb-containing assemblies has not yet been proposed and gives room for further fundamental research. The Bi III ion, on the other hand, has recently attracted considerable interest.…”

“…Due to the characteristics of 121 Sb, the electronic structure of Sb compounds can accurately be analyzed by this method. 324 For the aforementioned adduct, 323 a seven-coordinate geometry and stereochemical activity of the Sb III lone pair was proposed; 325 however, the actual structure of the obtained 1 : 1 adducts could not be clarified by that time. Later, Bertazzi et al as well as Levason et al performed a single-crystal XRD analysis of [Sb(tpy)F 3 ], which revealed the expected pseudo-pentagonal-bipyramidal coordination geometry – two F − ligands were located in the plane with the tpy ligand, the third F − ligand was found at an apical site of the structure and the lone pair occupied the seventh position (Fig.…”