Isolation and Magnetic Properties of Heterocycle-Carrying N-Alkoxyarylaminyl Radicals1
摘要:
Two N-tert-butoxy-2,6-diaryl-4-(4-pyridyl)phenylaminyls (1) and three N-tert-butoxy-2,6-diaryl-4-(1H-imidazol-1-yl)phenylaminyls (2) were prepared by the reaction of the lithium salts of the corresponding anilines with tertbutyl peroxybenzoate. Although 1 could not be isolated as radical crystals, 2 was successfully obtained as red crystals. The X-ray crystallographic analysis and magnetic susceptibility measurements were performed for one isolated radical.
能量有利的阳离子-π相互作用在化学和生物学中的许多分子识别过程中都起着重要作用。在本文中,我们对包含与中心苯胺离子相邻的侧位间/对位取代的芳环的2,6-二芳基苯胺进行了协同实验和计算物理-有机化学研究。基于定量分子轨道理论和规范的能量分解分析(EDA)方案,结合测量p K a值,2,6-二芳基硅鎓阳离子的结构分析和量子化学分析,揭示了空间阳离子-π相互作用实质上有助于观察到的质子亲和力和p K a趋势 值为2,6-二芳基苯胺。
Isolation and Magnetic Properties of Heterocycle-Carrying <i>N</i>-Alkoxyarylaminyl Radicals<sup>1</sup>
作者:Yozo Miura、Toshiyuki Nishi、Yoshio Teki
DOI:10.1021/jo0302105
日期:2003.12.1
Two N-tert-butoxy-2,6-diaryl-4-(4-pyridyl)phenylaminyls (1) and three N-tert-butoxy-2,6-diaryl-4-(1H-imidazol-1-yl)phenylaminyls (2) were prepared by the reaction of the lithium salts of the corresponding anilines with tertbutyl peroxybenzoate. Although 1 could not be isolated as radical crystals, 2 was successfully obtained as red crystals. The X-ray crystallographic analysis and magnetic susceptibility measurements were performed for one isolated radical.
Stabilization of 2,6-Diarylanilinum Cation by Through-Space Cation−π Interactions
Energetically favorable cation−πinteractions play important roles in numerous molecular recognition processes in chemistry and biology. Herein, we present synergistic experimental and computational physical–organic chemistry studies on 2,6-diarylanilines that contain flanking meta/para-substituted aromatic rings adjacent to the central anilinium ion. A combination of measurements of pKa values, structural
能量有利的阳离子-π相互作用在化学和生物学中的许多分子识别过程中都起着重要作用。在本文中,我们对包含与中心苯胺离子相邻的侧位间/对位取代的芳环的2,6-二芳基苯胺进行了协同实验和计算物理-有机化学研究。基于定量分子轨道理论和规范的能量分解分析(EDA)方案,结合测量p K a值,2,6-二芳基硅鎓阳离子的结构分析和量子化学分析,揭示了空间阳离子-π相互作用实质上有助于观察到的质子亲和力和p K a趋势 值为2,6-二芳基苯胺。