METALLORGANISCHE VERBINDUNGEN DER LANTHANOIDE XXXV. BIS(TETRAMETHYLETHYLENDIAMIN)LITHIUM TETRAKIS-t-BUTYLLUTETAT(III):SYNTHESE, MOLEKUELSTRUKTUR UND REAKTIVES VERHALTEN GEGENUEBER α,β-UNGESAETTIGTEN CARBONYLVERBINDUNGEN

Article abstract of DOI:10.1016/S0022-328X(00)99709-2

LuCl3 reacts with t-butyllithium in the presence of ether and tetramethylethylene diamine (tmed) to form , the structure of which has been elucidated through complete X-ray analysis.The crystals are orthorhombic with a 20.995(9), b 18.310(7), c 9.527(2) Angstroem, space group P2₁ab, Z = 4, D(calcd) 1.17 g cm^-3, R = 0.035, and 2471 observed reflections.The compound undergoes 1,2-addition to cinnamic aldehyde, benzalacetone, 1-phenylbutene-2-methyl-3-one, 2-methylbutene-3-one and cyclohexanone, respectively, to give after hydrolysis of the reaction mixture α-t-butyl-substituted enoles.The reaction products were identified by means of GC/MS methods.