Kelly, John A. and Gramueller, Johannes and Gschwind, Ruth M. and Wolf, Robert (2021) Low-oxidation state cobalt-magnesium complexes: ion-pairing and reactivity. DALTON TRANSACTIONS, 50 (39). pp. 13985-13992. ISSN 1477-9226, 1477-9234
Full text not available from this repository. (Request a copy)Abstract
Magnesium cobaltates ((Ar)nacnac)MgCo(COD)(2) (1-3) were synthesised by reacting ((Ar)nacnac)MgI(OEt2) with K[Co(eta(4)-COD)(2)] (COD = 1,5-cyclooctadiene) [(Ar)nacnac = CH(ArNCMe)(2); Ar = 2,4,6-Me-3-C6H2 (Mes), 2,6-Et-2-C6H3 (Dep), 2,6-iPr(2)-C(6)H(3)Mes (Dipp)]. Compounds 1-3 form contact ion-pairs in toluene, while solvent separated ion-pairs are formed in THF. The effect of ion-pairing on the reactivity is illustrated by reaction of 2 with tert-butylphosphaalkyne, which affords distinct 1,3-diphosphacyclobutadiene complexes. The heteroleptic sandwich complex [((Dep)nacnac)MgCo(P(2)C(2)tBu(2))](2) (4) is selectively formed in toluene, while the homoleptic bis(1,3-diphosphacyclobutadiene) complex [((Dep)nacnac)Mg(THF)(3)][Co (P(2)C(2)tBu(2))(2)] (5) is obtained in THF. Complex 4 is a precursor to further unusual phosphaorganometallic compounds. Substitution of the labile COD ligand in 4 by white phosphorus (P-4) enabled the synthesis of the phosphorus-rich sandwich compound [((Dep)nacnac)MgCoP4(P(2)C(2)tBu(2))](2) (6). The heterobimetallic complex (Cp*NiP(2)C(2)tBu(2))Co(COD) (7) was isolated after treatment of 4 with Cp*Ni(acac) (Cp* = C5Me5, acac = acetylacetonate).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CROSS-COUPLING REACTIONS; TRANSITION-METAL; BASIS-SETS; PHOSPHORUS; MG; COORDINATION; VALENCE; ACCESS; IRON; FE; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Prof. Dr. Robert Wolf Chemistry and Pharmacy > Institut für Organische Chemie > Arbeitskreis Prof. Dr. Ruth Gschwind |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 06 Jul 2022 13:20 |
| Last Modified: | 06 Jul 2022 13:20 |
| URI: | https://pred.uni-regensburg.de/id/eprint/45684 |
Actions (login required)
 |
View Item |
