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Issue 16, 2013
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Room temperature C–N bond cleavage of anionic guanidinate ligand in rare-earth metal complexes

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Abstract

The dissociation of the anionic guanidinate ligand N[double bond, length as m-dash]C(NMe2)2 promoted by rare-earth metal complexes at room temperature is described. Treatment of CpLnCl2(THF)3 with two equiv. of Li[N[double bond, length as m-dash]C(NMe2)2] in THF at room temperature affords [Cp2Ln(μ-η12-L2)]2 (Ln = Y; L = N[double bond, length as m-dash]C(NMe2)N[double bond, length as m-dash]C(NMe2)2) and CpLn[N[double bond, length as m-dash]C(NMe2)2](μ-η12-L)2LnCp2 (Ln = Dy) in moderated yields, respectively. YCl3 reacts with three equiv. of Li[N[double bond, length as m-dash]C(NMe2)2] under the same conditions to give a trinuclear yttrium guanidinate [(Me2N)2C[double bond, length as m-dash]N]5Y3[μ-N[double bond, length as m-dash]C(NMe2)2]2(μ-η12-L)2 in 63% yield. These reactions show that rare-earth metals can promote a C–N bond cleavage of the guanidine anion [N[double bond, length as m-dash]C(NMe2)2] at room temperature. All new complexes were characterized by elemental analysis and spectroscopic properties, and their solid-state structures were determined through single-crystal X-ray diffraction analysis.

Graphical abstract: Room temperature C–N bond cleavage of anionic guanidinate ligand in rare-earth metal complexes

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Publication details

The article was received on 03 Jan 2013, accepted on 11 Feb 2013 and first published on 11 Feb 2013


Article type: Paper
DOI: 10.1039/C3DT00014A
Citation: Dalton Trans., 2013,42, 5826-5831
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    Room temperature C–N bond cleavage of anionic guanidinate ligand in rare-earth metal complexes

    J. Zhang, W. Yi, Z. Chen and X. Zhou, Dalton Trans., 2013, 42, 5826
    DOI: 10.1039/C3DT00014A

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