作者:Silverio Coco、Pablo Espinet、Eva Marcos
DOI:10.1039/a910347n
日期:——
The synthesis, characterization and mesomorphic properties of three series of isocyanides and their trigonal bipyramidal iron(0) complexes [Fe(CO)4(CNR)] (R = C6H4O(O)CC6H4C6H4OCnH2n + 1, C6H4C(O)OC6H4C6H4OCnH2n + 1, C6H4C6H4O(O)CC6H4OCnH2n + 1, n = 6, 8, 10, 12) are described. The free isocyanides exhibit nematic and/or smectic A phases for shorter chains (n = 6, 8) and only smectic A phases for longer chains, except the isocyanides CNC6H4O(O)CC6H4C6H4OCnH2n + 1 which melt with extensive decomposition and do not produce mesophases. Their coordination to give the iron complexes [Fe(CO)4(CNR)] produces a slight decrease of their transition temperatures. The iron isocyanide complexes prepared show only a smectic C phase. The relationship between the molecular structure of the complexes and their thermal behaviour is discussed.
三个系列异氰酸酯及其三叉双锥铁(0)配合物[Fe(CO)4(CNR)](R = C6H4O(O)CC6H4C6H4OCnH2n + 1、1, C6H4C6H4OCnH2n + 1, C6H4C6H4O(O)CC6H4OCnH2n + 1, n = 6, 8, 10, 12)。游离的异氰酸酯在较短链(n = 6、8)上表现出向列和/或共晶 A 相,而在较长链上则仅表现出共晶 A 相,只有异氰酸酯 CNC6H4O(O)CC6H4C6H4OCnH2n + 1 除外,它们在熔化时会发生大量分解,不会产生介相。它们配位生成的铁络合物 [Fe(CO)4(CNR)] 的转变温度略有降低。所制备的异氰化铁络合物只显示出一个呈胶状的 C 相。本文讨论了络合物分子结构与其热行为之间的关系。