Syntheses and structures of bora-amidinate lanthanide(III) complexes

Sjoerd Harder*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)

Abstract

The use and coordination modes of the dianionic bora-amidinate ligand in lanthanide(III) chemistry is explored. Synthetic routes to complexes of the type (DIPPN)BN-LnR (Ln = lanthanide, (DIPPN)BN = HB[N(2,6-iPr(2)-phenyl)](2), R = an amide or benzylide group) have been developed. The reaction of (DIPPN)BN-H(2) with (DMA)(3)Sm (DMA = 2-Me(2)N-benzyl) gave dark-red crystals of (DIPPN)BN-Sm(DMA) in 68% yield. The yttrium analogue, (DIPPN)BN-Y(DMA), was prepared similarly (yellow crystals, 58% yield). The reaction of (DIPPN)BN-Sm(DMA) with (Me(3)Si)(2)NH gave (DIPPN)BN-SmN(SiMe(3))(2)center dot(THF)(2) (yellow crystals, 54% yield). Crystal structure determinations of (DIPPN)BN-Sm(DMA) and (DIPPN)BN-Y(DMA) revealed dimeric complexes that are held together by Ln center dot center dot center dot DIPP interactions. The complex (DIPPN)BN-SmN(SiMe(3))(2)center dot(THF)(2) crystallized as a monomer. NMR investigations of [(DIPPN)BN-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 (DIPPN)BN-Y(DMA)center dot(THF)(x).

Original languageEnglish
Pages (from-to)6677-6681
Number of pages5
JournalDalton Transactions
Volume39
Issue number29
DOIs
Publication statusPublished - 2010
Externally publishedYes

Keywords

  • X-RAY-STRUCTURE
  • BORAAMIDINATE LIGANDS
  • CHEMISTRY
  • COMPOUND
  • GROUP-3
  • METALS
  • NACNAC
  • SM

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