Reisinger, Sabine and Bodensteiner, Michael and Pineda, Eufemio Moreno and McDouall, Joseph J. W. and Scheer, Manfred and Layfield, Richard A. (2014) Addition of pnictogen atoms to chromium(II): synthesis, structure and magnetic properties of a chromium(IV) phosphide and a chromium(III) arsenide. CHEMICAL SCIENCE, 5 (6). pp. 2443-2448. ISSN 2041-6520, 2041-6539
Full text not available from this repository. (Request a copy)Abstract
Chromium(II) chloride reacts with lithium pentamethylcyclopentadienide (LiCp*, Cp* C5Me5) and LiE(SiMe3)(2) (E = P or As) to give the heterocubane chromium phosphide [(eta(5)-Cp* Cr)(mu(3)-P)](4) (1) or the chromium arsenide cage [(eta(5)-Cp* Cr)(3)(mu(3)-As)(2)] (2), respectively. The crystal and molecular structures of both compounds have been determined by X-ray crystallography. The reactions represent unusual oxidative additions of pnictogen atoms to chromium(II), which in the case of 1 results in the formation of the unusual chromium(IV) formal oxidation state, and in the case of 2 provides access to chromium(III). Compound 1 is also a rare example of a transition metal mu 3-phosphide-ligated cubane. Magnetic susceptibility and magnetization measurements, with support from DFT calculations, indicate S 2 and S 9/2 ground states for 1 and 2, respectively, which can be rationalized by considering the electronic structure in terms of chromium-chromium bonding.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | IRON-SULFUR CLUSTERS; SPIN-CROSSOVER; ORGANOMETALLIC OXIDES; MOLECULAR-STRUCTURES; CRYSTAL-STRUCTURE; WHITE PHOSPHORUS; COBALT COMPLEXES; METAL-COMPLEXES; P-4 ACTIVATION; BASIS-SETS; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Nov 2019 09:01 |
| Last Modified: | 29 Nov 2019 09:01 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10996 |
Actions (login required)
 |
View Item |
