Lithium complexes supported by tripodal diaminebis(aryloxido) ligands: synthesis and structure

Dalton Trans. 2012 Jan 14;41(2):442-7. doi: 10.1039/c1dt11498k. Epub 2011 Oct 26.


The diaminebis(aryloxido) ligand precursors H(2)L(1) and H(2)L(2) [H(2)L(1) = Me(2)NCH(2)CH(2)N(CH(2)-4-CMe(2)CH(2)CMe(3)-C(6)H(3)OH)(2); H(2)L(2) = Me(2)NCH(2)CH(2)N(CH(2)-4-Me-C(6)H(3)OH)(2)] were synthesized by a straightforward single-step Mannich condensation. Their reactions with 2 molar equivalents of MeLi in thf afforded [Li(4)(μ-L-κ(4)O,N,N,O)(2)(thf)(2)] (1a, L(1); 1b, L(2)) and unexpectedly small amounts (∼9%) of [Li(6)(μ-L-κ(4)O,N,N,O)(2)(μ(3)-Cl)(2)(thf)(4)]·thf (2a·thf; L(1); 2b·thf, L(2)). Stoichiometric reactions of LiCl, MeLi and ligand precursors H(2)L led to the formation of 2a and 2b in high yield (∼80%). All compounds were characterized by chemical and physical techniques including X-ray crystallography for H(2)L(1), H(2)L(2), 1b, 2a and 2b.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Coordination Complexes / chemical synthesis*
  • Coordination Complexes / chemistry*
  • Crystallography, X-Ray
  • Diamines / chemical synthesis
  • Diamines / chemistry*
  • Hydrogen Bonding
  • Ligands
  • Lithium / chemistry*
  • Models, Molecular
  • Molecular Conformation
  • Phenols / chemical synthesis
  • Phenols / chemistry*


  • Coordination Complexes
  • Diamines
  • Ligands
  • Phenols
  • Lithium