Synthesis, characterization and crystal structures of dipyridyl-N-methylimine and cloro-bis (N,N′-2,2′-dipyridyl-N-methylimine)lithium complex
作者:Benito Flores-Chávez、Bernat Abeit Martínez-Ortega、José Guadalupe Alvarado-Rodríguez、Noemí Andrade-López
DOI:10.1007/s10870-005-2219-3
日期:2005.6
The preparation and characterization by X-ray crystallography and NMR spectroscopy of the 2,2′-dipyridyl-N-methylimine (dpNmei) and the complex [cloro-bis(N,N′-2,2′-dipyridyl-N-methylimine)]lithium [Li(dpNmei)2(Cl)] is reported. The dpNmei was prepared from the reaction of the 2,2′-dipyridyl ketone (dpk) and methylamine and crystallizes in the monoclinic P21/n space group with a = 6.3887(6), b = 10.1709(10), c = 16.7594(17) (Å), β = 100.918(2)∘ and V = 1069.29(18) Å3. The lithium complex was obtained from the reaction of dpNmei and LiCl in a molar ratio 2:1. [Li(dpNmei)2Cl] crystallizes in the orthorhombic Pbcn space group with a = 10.0092(12), b = 9.8201(12), c = 23.669(3) (Å) and V = 2326.4(5) Å3. The crystallographic data show that the lithium ion is five-coordinated with four coordination bonds N→Li due the chelation of dpNmei and one Li–Cl bond.
本文报道了2,2′-二吡啶基-N-甲基亚胺(dpNmei)和[氯-双(N,N′-2,2′-二吡啶基-N-甲基亚胺)]锂[Li(dpNmei)2(Cl)]的制备和X射线晶体学和核磁共振光谱学表征。dpNmei由2,2′-二吡啶基酮(dpk)和甲胺反应制备,在单斜晶系P21/n空间群中结晶,a = 6.3887(6),b = 10.1709(10),c = 16.7594(17) (Å),β = 100.918(2)∘,V = 1069.29(18) Å3。锂络合物由dpNmei和LiCl以2:1的摩尔比反应获得。[Li(dpNmei)2Cl]在正交晶系Pbcn空间群中结晶,a = 10.0092(12),b = 9.8201(12),c = 23.669(3) (Å),V = 2326.