作者:Frank Becke、Frank W. Heinemann、Tobias Rüffer、Peter Wiegeleben、Roland Boese、Dieter Bläser、Dirk Steinborn
DOI:10.1016/s0022-328x(97)00404-x
日期:1997.12
Recrystallization of 1c and 1d from n-hexane/THF gives [Li2(CH2NPh2)2(THF)3] (1c′) and [Li4(CH2NC5H10)4(THF)2] (1d′), respectively, whose structures (X-ray) were determined. The dimeric compound 1c′ forms a central planar four-membered Li2C2 ring. One lithium atom is four-coordinated to two methylene carbon atoms (d(Li-C) = 2.246(9), 2.235(9) Å) and two oxygen atoms of THF. Unusually, the second lithium exhibits
(氨基甲基)锂化合物LiCH 2 NRR'· x THF(NRR'= NMe 2(1a,x = 0),NPhMe(1b,x = 2),NPh 2(1c,x = 1…1,5),NC通过Bu 3 SnCH 2的反应制备5 H 10(1d,x = 0,NC 5 H 10 =哌啶子基)和NC 7 H 14(1e,NC 7 H 14 = 2,6-二甲基哌啶子基)。与BuLi的NRR'。1a–d以固态分离,并通过NMR光谱(1 H,13 C,7 Li)表征。在溶液中获得1e,并通过与MeOH和二苯甲酮反应生成MeNC 7 H 14和Ph 2 C(OH)CH 2 NC 7 H 14进行表征。的再结晶1C和1D从Ñ正己烷/ THF给出[李2(CH 2 NPH 2)2(THF)3 ](1C)和[Li 4(CH 2 NC 5 H 10)4(THF)2 ](1d '),分别确定了它们的结构(X射线)。二聚化合物1c