Synthesis and characterization of cobalt SCS pincer complexes

Jan Pecak; Matthias Käfer; Sarah Fleissner; Werner Artner; Karl Kirchner

doi:10.1007/s00706-022-02949-1

Synthesis and characterization of cobalt SCS pincer complexes

Monatsh Chem. 2022;153(7-8):545-549. doi: 10.1007/s00706-022-02949-1. Epub 2022 Jul 16.

Authors

Jan Pecak¹, Matthias Käfer¹, Sarah Fleissner¹, Werner Artner², Karl Kirchner¹

Affiliations

¹ Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-AC, 1060 Vienna, Austria.
² X-Ray Center, Vienna University of Technology, Getreidemarkt 9/163-AC, 1060 Vienna, Austria.

Abstract

The synthesis and characterization of two Co(II) complexes stabilized by a tridentate SCS pincer ligand are described. Paramagnetic [Co(κ³-SCS^CH2-Et)₂] and [Co(κ³-SCS^CH2-tBu)(κ²-SCS^CH2-tBu)] were obtained via transmetalation protocol from CoBr₂ and S(C-Br)S^CH2-R (R = Et, tBu). Oxidation of the latter with [Cp₂Fe]PF₆ affords the diamagnetic 18 VE complex [Co(κ³-SCS^CH2-tBu)₂]PF₆. X-ray structures and DFT calculations are presented.

Supplementary information: The online version contains supplementary material available at 10.1007/s00706-022-02949-1.

Keywords: Cobalt; DFT; Pincer complex; Transmetalation.