Structural Isomerism in Crystals of Redox-Active Secondaryortho-Diamides: The Role of Competing Intra- and Intermolecular Hydrogen Bonds in Directing Crystalline Topologies
作者:St�phane A. Baudron、Narcis Avarvari、Enric Canadell、Pascale Auban-Senzier、Patrick Batail
DOI:10.1002/chem.200400153
日期:2004.9.20
on the packing of the molecules. Electrocrystallization of methyl derivative 1 with ReO4- or ClO4-, two anions of different volumes but otherwise identical charge and symmetry, revealed a fine sensitivity of the constrained seven-membered ring to the internal chemical pressure exerted by the anion. [1]2 *+ReO4 (sigmaRT=8.5 S cm(-1), activation energy Delta=600 K at high temperature) and beta"-[1]2 *+ClO4
一系列七个邻-双(烷基酰胺基)乙撑二硫代四硫富瓦烯烯衍生物EDT-TTF-(CONHR)2的固态化学(R = Me,1; Et,2; Pr,3; Bu,4; Pent,5; Hex (6;和Bz,7),以其中性和单电子氧化的自由基阳离子状态,研究了分子内和分子间氢键基序的拓扑结构。在中性单分子固体的情况下,分子内N-HO氢键密封受约束的1、2、3和7的七元环,但在丁基衍生物4中被破坏,以反平行梯形为代价分子内氢键的键 在固态中,溶液中观察到的分子内和分子间氢键之间的竞争取决于分子的堆积。甲基衍生物1与ReO4-或ClO4-的电结晶,两个体积不同但电荷和对称性相同的阴离子显示,受约束的七元环对阴离子施加的内部化学压力具有良好的敏感性。[1] 2 * + ReO4(sigmaRT = 8.5 S cm(-1),高温下活化能Delta = 600 K)和beta“-[1] 2 * + ClO4(sigmaRT