The Synthesis and Structure of a Scandium Nitrate Hydroxy-bridged Dimeric Complex Supported by Bipyridyl Ligands

Paul Raithby, Simon A. Cotton, Stephanie Schiffers, Simon Teat, John Warren

Research output: Contribution to journalArticlepeer-review

Abstract

The current discussion on whether scandium, yttrium and lanthanum should represent Group 3 in the Periodic Table or whether lutetium should replace lanthanum in the Group has prompted us to further explore the structural chemistry of the Group 3 elements and compare the coordination numbers and coordination geometries adopted. The steric and electronic properties of the coor-dinated ligands have a major influence on the structures adopted. We report the synthesis and crystal structure determination of an unusual dinuclear scandium complex [(bipy)(NO3)2Sc(-OH)2Sc(NO3)2(bipy)] obtained by the reaction of hydrated scandium nitrate with 2,2’-bipyridyl (bipy) in either ethanol or nitromethane. The crystal structure of the complex shows that the scandium centers are eight coordinate, and the structure obtained contrasts with related complexes found in the lanthanide series [Ln(bipy)2(NO3)3] and [Ln(phen)2(NO3)3] (phen = phe-nanthroline) and in [M(terpy)(NO3)3] (M = Sc, Er-Lu) where these complexes are all mononuclear.
Original languageEnglish
Article number2024
JournalMolecules
Volume27
Issue number6
DOIs
Publication statusPublished - 21 Mar 2022

Keywords

  • Crystal structure analysis
  • Scandium(III)
  • Nitrate complexes
  • hydroxyl groups
  • Eight coordinate

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