Chakraborty, Uttam and Modl, Moritz and Muehldorf, Bernd and Bodensteiner, Michael and Demeshko, Serhiy and van Velzen, Niels J. C. and Scheer, Manfred and Harder, Sjoerd and Wolf, Robert (2016) Pentaarylcyclopentadienyl Iron, Cobalt, and Nickel Halides. INORGANIC CHEMISTRY, 55 (6). pp. 3065-3074. ISSN 0020-1669, 1520-510X
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The preparation of new stable half-sandwich transition metal complexes, having a bulky cyclopentadienyl ligand C-5(C6H4-4-Et)(5) (Cp-Ar1) or C-5(C6H4-4-nBu)(5) (Cp-Ar2), is reported. The tetrahydrofuran (THF) adduct [(CpFe)-Fe-Ar1(mu-Br)(THF)](2) (1a) was synthesized by reacting K[Cp-Ar1] with [FeBr2(THF)(2)] in THF, and its molecular structure was determined by X-ray crystallography. Complex 1a easily loses its coordinated THF molecules under vacuum to form the solvent-free complex [(CpFe)-Fe-Ar1(mu-Br)](2) (1b). The analogous complexes [(CpCo)-Co-Ar1(mu-Br)](2) (2), [(CpNi)-Ni-Ar1(mu-Br)](2) (3), and [(CpNi)-Ni-Ar2(mu-Br)](2) (4) were synthesized from CoBr2 and [NiBr2(1,2-dimethoxyethane)]. The mononuclear, low-spin cobalt(III) and nickel(III) complexes [(CpMI2)-M-Ar2] (5, M = Co; 6, M = Ni) were prepared by reacting the radical Cp-Ar2 with NiI2 and CoI2. The complexes were characterized by NMR and UV-vis spectroscopies and by elemental analyses. Single-crystal X-ray structure analyses revealed that the dimeric complexes 1a, 1b, and 3 have a planar M2Br2 core, whereas 2 and 4 feature a puckered M2Br2 ring.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COMPLEXES BEARING; X-RAY; (CPFE)-FE-BIG(CO)(2) RADICALS; MOLECULAR-STRUCTURE; SANDWICH COMPOUNDS; CRYSTAL-STRUCTURE; PI-COMPLEXES; CP-ASTERISK; LIGANDS; DERIVATIVES; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Prof. Dr. Robert Wolf |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 03 Apr 2019 11:20 |
| Last Modified: | 03 Apr 2019 11:20 |
| URI: | https://pred.uni-regensburg.de/id/eprint/3233 |
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