Piesch, Martin and Reichl, Stephan and Seidl, Michael and Balazs, Gabor and Scheer, Manfred (2019) Ring Contraction by NHC-Induced Pnictogen Abstraction. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 58 (46). pp. 16563-16568. ISSN 1433-7851, 1521-3773
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The reaction of [Cp ''' Co(eta(4)-P-4)] (1) (Cp '''=1,2,4-tBu(3)C(5)H(2)) with (NHC)-N-Me ((NHC)-N-Me=1,3,4,5-tetramethylimidazol-2-ylidene) leads through NHC-induced phosphorus cation abstraction to the ring contraction product [((NHC)-N-Me)(2)P][Cp ''' Co(eta(3)-P-3)] (2), which represents the first example of an anionic CoP3 complex. Such NHC-induced ring contraction reactions are also applicable for triple-decker sandwich complexes. The complexes [(Cp*Mo)(2)(mu,eta(6:6)-E-6)] (3 a, 3 b) (Cp*=C5Me5; E=P, As) can be transformed to the complexes [((NHC)-N-Me)(2)E][(Cp*M)(2)(mu,eta(3:3)-E-3)(mu,eta(2:2)-E-2)] (4 a, 4 b), with 4 b representing the first structurally characterized example of an NHC-substituted As-I cation. Further, the reaction of the vanadium complex [(Cp*V)(2)(mu,eta(6:6)-P-6)] (5) with (NHC)-N-Me results in the formation of the unprecedented complexes [((NHC)-N-Me)(2)P][(Cp*V)(2)(mu,eta(6:6)-P-6)] (6), [((NHC)-N-Me)(2)P][(Cp*V)(2)(mu,eta(5:5)-P-5)] (7) and [(Cp*V)(2)(mu,eta(3:3)-P-3)(mu,eta(1:1)-P{(NHC)-N-Me})] (8).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | P-4 ACTIVATION; PHOSPHORUS; COMPLEXES; ELEMENTS; FRAGMENTATION; REACTIVITY; LIGAND; arsenic; carbenes; phosphorus; ring contraction; vanadium |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Manfred Scheer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Mar 2020 13:04 |
| Last Modified: | 26 Mar 2020 13:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/26152 |
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