
%0 Journal Article
%A Deacon, Glen B. 
%A Forsyth, Craig M. 
%A Scott, Natalie M. 
%A Skelton, Brian W. 
%A White, Allan H. 
%T Ether-Functionalized Organoamide Coordination to Lanthanoid(II)/(III) Centres
%J Australian Journal of Chemistry
%D 2001/12/19
%V 54
%N 7
%P 439-446
%K 
%R https://doi.org/10.1071/CH01136
%U https://www.publish.csiro.au/paper/CH01136 
%X Ligand exchange reactions of &#91;Ln&#123;N(SiMe3)2&#125;2(S)x&#93; (Ln = Eu, (S)x&#93; = (thf)2or dme; Ln = Yb, (S)x = dme) (where thf and dme represent tetrahydrofuran and 1,2-dimethoxyethane, respectively) with N-2- (methoxyphenyl)-N-trimethylsilylamine (L1H) in toluene at low temperatures yielded thermally unstable &#91;Ln(L1)2(S)x&#93; (Ln = Eu, (S)x = (thf)2 or dme; Ln = Yb, (S)x = dme). An analogous reaction with N-2-(phenoxyphenyl)-N-trimethylsilylamine (L2H) and &#91;Yb&#123;N(SiMe3)2&#125;2&#125;(thf)2&#125;&#93; did not give the expected lanthanoid(II) complex but instead gave &#91;Yb(L2)2&#125;(OPh)(thf)&#93;. The three lanthanoid(II) complexes exhibit monomeric, distortedcis-octahedral structures and have two chelating amide (L1) ligands with a further one dme or two thf molecules required to saturate the metal coordination sphere. Oxidation of &#91;Yb(L1)2(thf)2&#93; with TlCp gave thallium metal and the ytterbium(III) complex &#91;YbCp2(L1)&#93;, presumably formed by ligand redistribution of a Yb(L1)2Cp species. The reaction of &#91;YbCp* 2(thf)&#93; (where Cp* represents C5Me5) with new Hg(L1)2or Hg(L2)2 compounds generated mercury metal and the bis(pentamethylcyclopentadienyl)ytterbium(III) complexes &#91;YbCp*2(L1)&#93; and &#91;YbCp* 2(L2)&#93;. The three cyclopentadienylytterbium(III) complexes are monomeric and adopt classical eight-coordinate, pseudo-tetrahedral geometries derived from two &#x03B7;5-Cp or Cp* ligands and a chelating L1 or L2 amide. 
