Lanthanide Complexes Coordinated by a Dianionic Bis(amidinate) Ligand with a Rigid Naphthalene Linker
作者:Marina V. Yakovenko、Anton V. Cherkasov、Georgy K. Fukin、Dongmei Cui、Alexander A. Trifonov
DOI:10.1002/ejic.201000330
日期:2010.7
which are coordinated by the linked dianionic bis(amidinate) ligand. The structures of complexes 4-6 were established by X-ray diffraction studies, which reveal that the new ligand framework can coordinate to the lanthanide atoms in different fashions depending on the central atom ion size. Alkylation of complex 6 with equimolar amounts of LiCH2SiMe3 afforded the unexpected amido-amidinate complex [1,8-C10H6(NC(tBu)-N-2
具有构象刚性萘接头的新双脒配体的合成途径,1,8-C10H6[NHC-(tBu)=N(2,6-Me-2-C6H3)][N=C(tBu) NH(2,6-Me-2-C6H3)] (3) 被详细阐述。用两当量的 nBuLi 对该双(脒)配体进行去质子化,随后与无水 LnCl(3)(Ln = Y、Nd、Sm)反应,合成了氯络合物 [1,8-C10H6NC(tBu)N -2,6-Me2C6H3}(2)]YCl(dme) (4), [1,8-C10H6NC(tBu)N-2,6-Me(2)C6H(3)}(2)]Nd (dme)(mu-Cl)(2)Li(dme) (5) 和 [1,8-C10H6NC(tBu)-N-2,6-Me-2-C6H3}(2)]Sm( thf)(mu-Cl)(2)Li(thf)(2) (6),由连接的双阴离子双(脒)配体配位。通过 X 射线衍射研究确定了配合物 4-6 的结构,