Crystal structures of two ytterbium(III) complexes comprising alkynylamidinate ligands

Sida Wang; Farid M Sroor; Phil Liebing; Volker Lorenz; Liane Hilfert; Frank T Edelmann

doi:10.1107/S2056989016012135

Crystal structures of two ytterbium(III) complexes comprising alkynylamidinate ligands

Acta Crystallogr E Crystallogr Commun. 2016 Aug 2;72(Pt 9):1229-1233. doi: 10.1107/S2056989016012135. eCollection 2016 Sep 1.

Authors

Sida Wang¹, Farid M Sroor², Phil Liebing¹, Volker Lorenz¹, Liane Hilfert¹, Frank T Edelmann¹

Affiliations

¹ Chemisches Institut der Otto-von-Guericke-Universitaet Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany.
² Organometallic and Organometalloid Chemistry Department, National Research, Centre, 12622 Cairo, Egypt.

Abstract

Two ytterbium(III) complexes comprising alkynylamidinate ligands, namely bis-(η⁵-cyclo-penta-dien-yl)(3-cyclo-propyl-N,N'-diiso-propyl-propynamidinato-κ²N,N')ytterbium(III), [Yb(C₅H₅)₂(C₁₂H₁₉N₂)] or Cp₂Yb[( ⁱ Pr₂N)₂C-C≡C-c-C₃H₅] (1) and tris-(3-phenyl-N,N'-di-cyclo-hexyl-propynamidinato-κ²N,N')ytterbium(III), [Yb(C₂₁H₂₇N₂)₃] or Yb[(CyN)₂C-C≡C-Ph]₃ (Cy = cyclo-hex-yl) (2) have been synthesized and structurally characterized. Both complexes are monomers; for complex 2, the contribution to the scattering from highly disordered toluene solvent molecules in these voids was removed with the SQUEEZE routine [Spek (2015). Acta Cryst. C71, 9-18] in PLATON. The stated crystal data for Mr, μ etc. do not take these into account.

Keywords: alkynylamidinate ligands; amidinates; crystal structure; cyclopentadienyl complexes; ytterbium.