Issue 16, 2013

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

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

Supplementary files

Article information

Article type
Paper
Submitted
03 Jan 2013
Accepted
11 Feb 2013
First published
11 Feb 2013

Dalton Trans., 2013,42, 5826-5831

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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