Synthesis and structure of LLnBr2 (L=Et2NCH2CH2NC(Me)CHC(Me)NCH2CH2NEt2; Ln=Y, Sm, and Yb)
                                
                                    
                                        作者:Ana Mirela Neculai、Dante Neculai、Herbert W. Roesky、Jörg Magull                                    
                                    
                                        DOI:10.1016/j.poly.2003.10.009
                                    
                                    
                                        日期:2004.1
                                    
                                    The reaction of the in situ prepared LLi (L=Et2NCH2CH2NC(Me)CHC(Me)NCH2CH2NEt2) with LnBr(3) (Ln = Y, Sm, and Yb) led to the solvent and alkali salt free dibromoderivative of type LLnBr(2) (Ln = Y, 1, Sm, 2, and Yb, 3). Compounds 1-3 were characterized by X-ray crystallography, elemental analysis, and NMR (1), and their structural features were correlated with those of other compounds bearing the same ligand. (C) 2003 Elsevier Ltd. All rights reserved.