Synthesis and structural characterizations of organolanthanide complexes with amino-tethered guanidinate ligand (C5H5)2Ln[H2N(CH2)3Ndouble bond; length as m-dashC(NHiPr) NiPr)] (Ln = Yb, Y, Er, Dy)

Reaction of N,N′-diisopropylcarbodiimide (iPrNdouble bond; length as m-dashCdouble bond; length as m-dashNiPr) with H2N(CH2)3NH2 and (C5H5)3Ln, give (C5H5)2Ln[H2N(CH2)3Ndouble bond; length as m-dashC(NHiPr) NiPr)] in high yields, indicating that the N–H bonds of one NH2 group readily add to the Cdouble bond; length as m-dashN double bonds of carbodiimide and one cyclopentadienyl group is eliminated to construct a novel amino-tethered guanidinate anionic ligand [H2N(CH2)3Ndouble bond; length as m-dash C(NHiPr)NiPr)]−.