Thermal Properties and Crystal Structures of Ionic Liquids from Ruthenium Sandwich Complexes with Trialkoxybenzene Ligands: Effects of Substituent Positions and Alkyl Chain Lengths
作者:Takahiro Ueda、Tomoyuki Mochida
DOI:10.1021/acs.organomet.5b00021
日期:2015.4.13
A series of ionic liquids containing [Ru(C5H5)(arene)]+, where the arene ligands are 1,2,3-C6H3(OCnH2n+1)3 and 1,3,5-C6H3(OCnH2n+1)3 (n = 6, 12, and 18), were synthesized. The counteranions were PF6 and FSA (bis(fluorosulfonyl)amide). The melting points of the PF6 and FSA salts were 33–93 °C and −18–62 °C, respectively. In the PF6 salts, the melting points of the 1,3,5-derivatives were lower than those
一系列含有[Ru(C 5 H 5)(arene)] +的离子液体,其中的芳烃配体是1,2,3-C 6 H 3(OC n H 2 n +1)3和1,3,合成了5-C 6 H 3(OC n H 2 n +1)3(n= 6、12和18)。抗衡阴离子为PF 6和FSA(双(氟磺酰基)酰胺)。PF 6和FSA盐的熔点分别为33-93°C和-18-62°C。在PF 6中1,3-,5-衍生物的熔点比1,2,3-衍生物的熔点低28-55°C,而在FSA盐中未观察到这种趋势。X射线晶体学显示在固态的1,2,3-衍生物的PF 6盐中形成了层状结构。在这些晶体中,通常观察到通过C Cp H···F H键状相互作用的阳离子-阴离子对。几种1,3,5-衍生物显示出亚稳相,其熔点低于稳定相。还合成并表征了1,2,3-衍生物的盐(n = 2)。