Salsi Federico, Wang Shuai, Teutloff Christian, Busse Marvin, Neville Michael L, Hagenbach Adelheid, Bittl Robert, Figueroa Joshua S, Abram Ulrich
Institute of Chemistry and Biochemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany.
Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive MC 0358, La Jolla, CA 92193, USA.
Angew Chem Int Ed Engl. 2023 May 2;62(19):e202300254. doi: 10.1002/anie.202300254. Epub 2023 Apr 4.
The first consistent series of mononuclear 17-electron complexes of three Group 7 elements has been isolated in crystalline form and studied by X-ray diffraction and spectroscopic methods. The paramagnetic compounds have a composition of [M (CO)(CNp-F-Ar ) ] (M=Mn, Tc, Re; Ar =2,6-(3,5-(CF ) C H ) C H F) and are stabilized by four sterically encumbering isocyanides, which prevent the metalloradicals from dimerization. They have a square pyramidal structure with the carbonyl ligands as apexes. The frozen-solution EPR spectra of the rhenium and technetium compounds are clearly anisotropic with large Tc and Re hyperfine interactions for one component. High-field EPR (Q band and W band) has been applied for the elucidation of the EPR parameters of the manganese(0) complex.
