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Download or read book Synthesis, Characterization, and Reactivity of Manganese(II) Complexes Containing N-heterocyclic Carbene Ligands written by Venkateswaran Mahesh Krishnan and published by . This book was released on 2013 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of divalent manganese complexes containing N -heterocyclic carbene (NHC) ligands were synthesized and characterized in solution and the solid state. Chlorido complexes of Mn(II) containing the NHC ligands 1,3-dimesitylimidazol-2-ylidene (IMes) and 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr) were prepared in straightforward fashion by direct carbene addition to MnCl 2 (thf)1.5. The chlorido complexes were found to be ineffective precatalysts in Kumada-type coupling reactions of simple aryl halides. Cyclic voltammetry studies of one of the chloride complexes, [MnCl2 (IMes)2 ], demonstrate no electrochemically accessible reduction events in tetrahydrofuran, possibly accounting for the lack of catalytic activity. Chlorido complexes containing both IMes and IPr ligands serve as precursors to alkyl and aryl compounds of Mn(II). Characterization of the alkyl and aryl complexes is reported, and comparisons are made between these complexes and similar compounds in the chemical literature.