Attachment to manganese or cobalt of a bulky tri(organosilyl)methly ligand containing an NME2 or an OMe donor group

Al-Juaid S.S.; Eaborn C.; El-Hamruni S.M.; Hitchcock P.B.; Smith J.D.; Sözerli Can S.E.

Attachment to manganese or cobalt of a bulky tri(organosilyl)methly ligand containing an NME2 or an OMe donor group

Date

2002

Authors

Abstract

The organolithium compound Li(THF)2{C(SiMe3) 2(SiMe2NMe2)} reacted with one equivalent of MnCl2 to give (4) and with 0.5 equivalent of MnCl2 to give Mn{C(SiMe3)2(SiMe2NMe2)}2 together with a small amount of the MnIII compound [Mn(μ-O){C(SiMe3)2 (SiMe2NMe2)}]2 (6) formed by adventitious admission of air. With CoBr2, the compound [Co(μ-Br){C(SiMe3)2(SiMe2NMe2)}]2 (7) was obtained. The reaction between the lithium compound Li(THF)2{C(SiMe3)2(SiMe2OMe)} and MnCl2 in THF gave [Mn(THF)(μ-Cl){C(SiMe3)2 (SiMe2OMe)}]2 (5). The crystal structures of compounds 4, 5, 6 and 7 were determined. Compounds 4 and 5 are the first manganese analogues of Grignard reagents containing Mn-C σ-bonds to be characterised in the solid state. © 2002 Elsevier Science B.V. All rights reserved.