A structural, theoretical and coordinative evaluation of the bicyclic guanidinate derived from 1,4,6-triazabicyclo[3.3.0]oct-4-ene
作者:Majid S. Khalaf、Martyn P. Coles、Peter B. Hitchcock
DOI:10.1039/b806510a
日期:——
Zn(3)(tbo)(4)Me(2) (3). Structural characterization of these compounds enables comparison between the 5:5}-bicyclic system, [tbo](-), and the previously reported 6:6}-bicyclic system, [hpp](-) (where hppH = 1,3,4,6,7,8-hexahydro-2H-pyrimido[1,2-a]pyrimidine). Results indicate that delocalization within the [tbo](-) anion is restricted to the CN(2) amidinate component, with retention of electron density in the non-bonding
使用(n)BuLi可实现双环胍1,4,6-三氮杂双环[3.3.0] oct-4-ene(Htbo)的部分去质子化。分离得到的锂盐已导致混合阴离子配合物[Li(tbo)(VIII)(tboH)](2)}(无穷大)(其中-H = 1-(2-氨基乙基)- 2-咪唑烷硫酮)和部分去质子化的盐Li(6)(tbo)(6)(Htbo)(3),1b。中性胍Htbo与AlMe(3)和ZnMe(2)干净地反应以提供有机金属配合物[Al(tbo)Me(2)](2)[2](2)和Zn(3)(tbo)( 4)Me(2)(3)。这些化合物的结构特征使得可以比较5:5}-双环系统[tbo](-)和先前报道的6:6}-双环系统[hpp](-)(其中hppH = 1, 3,4,6,7,8-六氢-2H-嘧啶[1,2-a]嘧啶)。结果表明,在(tbo)(-)阴离子中的离域作用仅限于CN(2)in基成分,并在非键合氮孤对中