The use and coordination modes of the dianionic bora-amidinate ligand in lanthanide(III) chemistry is explored. Synthetic routes to complexes of the type DIPPNBN-LnR (Ln = lanthanide, DIPPNBN = HB[N(2,6-iPr2-phenyl)]2, R = an amide or benzylide group) have been developed. The reaction of DIPPNBN-H2 with (DMA)3Sm (DMA = 2-Me2N-benzyl) gave dark-red crystals of DIPPNBN-Sm(DMA) in 68% yield. The yttrium analogue, DIPPNBN-Y(DMA), was prepared similarly (yellow crystals, 58% yield). The reaction of DIPPNBN-Sm(DMA) with (Me3Si)2NH gave DIPPNBN-SmN(SiMe3)2·(THF)2 (yellow crystals, 54% yield). Crystal structure determinations of DIPPNBN-Sm(DMA) and DIPPNBN-Y(DMA) revealed dimeric complexes that are held together by Ln⋯DIPP interactions. The complex DIPPNBN-SmN(SiMe3)2·(THF)2 crystallized as a monomer. NMR investigations of [DIPPNBN-Y(DMA)]2 in benzene indicate that it is also dimeric in solution. The addition of THF resulted in its dissociation into monomeric units of DIPPNBN-Y(DMA)·(THF)x.
本文探讨了负离子
硼脒
配体在
镧系元素(III)
化学中的使用和协调模式。本文还开发了合成DIPPNBN-LnR(Ln =
镧系元素,DIPPNBN = HB[N(2,6-iPr2-苯基)]2,R = 酰胺或苄基)类配合物的合成路线。DIPPNBN-H2与(
DMA)3Sm(
DMA = 2-Me2N-苄基)的反应产生了深红色晶体DIPPNBN-Sm(
DMA),产率为68%。
钇类似物DIPPNBN-Y(
DMA)的制备方法与此类似(黄色晶体,产率为58%)。DIPPNBN-Sm(
DMA)与