Synthesis and Theoretical Investigation of a 1,8-Bis(bis(diisopropylamino)cyclopropeniminyl)naphthalene Proton Sponge Derivative
作者:Lee Belding、Travis Dudding
DOI:10.1002/chem.201302959
日期:2014.1.20
We report herein the synthesis and characterization of a new proton sponge derivative, 1,8‐bis(bis(diisopropylamino)cyclopropeniminyl)naphthalene 4 (DACN), as well as its bis‐protonated counterpart 6. A crystal structure of 6 is presented, along with variable temperature 1H NMR data on the BF4− salt (6⋅BF4). DFT calculations were performed to investigate the structure of the monoprotonated species
我们在此报告了一种新的质子海绵衍生物1,8-双(双(二异丙基氨基)环丙炔基)萘4(DACN)及其双质子化的对应物6的合成和表征。的晶体结构6被呈现,具有可变温度沿着1对BF H NMR数据4 -盐(6⋅BF 4)。进行DFT计算以研究单质子化物种7的结构,并深入了解所有三个物种的结构和电子性质。质子亲和力(PA)为4在B3LYP / 6-311G ++(d,p)// B3LYP / 6-31G(d,p)水平上计算,并考虑到B3LYP / 6-31G(d,p)方法的热校正,为282.3 kcal mol -1,而其p K a估计为27.0。进行NICS计算以检查每次连续质子化后这些系统内芳香性的变化。最后,使用同种异体反应方案来估计有助于预测4的强PA的因素。