A Scandium-Stabilized Diisophosphaethynolate Ligand: [OCPPCO] 4 .

Authors :: Grant LN
Pinter B
Manor BC
Grützmacher H
Mindiola DJ
Source :: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2018 Jan 22; Vol. 57 (4), pp. 1049-1052. Date of Electronic Publication: 2017 Dec 21.
Publication Year :: 2018
Abstract: The first example of the OCPPCO ligand, diisophosphaethynolate, is reported via reductive coupling of a Sc-OCP precursor. Upon reduction with KC <subscript>8</subscript> , isolation of the dinuclear complex, namely [K(OEt <subscript>2</subscript> )] <subscript>2</subscript> [(nacnac)Sc(OAr)] <subscript>2</subscript> (OCPPCO), is observed, leading to a unique motif [OCPPCO] <superscript>4-</superscript> , stabilized by two scandium centers. Detailed NMR spectra of all complexes as well as IR and single crystal X-ray studies were obtained to fully elucidate the nature of these complexes in solution as well as in the solid state. Theory is combined to probe the electronic structure and orbitals responsible for the bonding interactions in the Sc-OCPPCO-Sc skeleton but also to compare to the linear mode observed in the precursor.<br /> (© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.)