五甲氧羰基环戊二烯由于环上多个羧酸酯基取代,以至所得金属化合物有特殊的性质,1983年,我们曾利用此特点,合成了多种具环戊二烯基的镧系络合物。只是由于此类络合物多数呈粉末状,不易获得 X 射线结构分析的数据,因此设想合成相应的有机物以观察其结构.结果表明,此类化合物和大多数环戊二烯类不同,环上的羧酸酯基取 Pentamethoxycarbonylcyclopentadiene ring due to the replacement of a number of carboxylic acid ester, and the resulting metal compounds have special properties, in 1983, we have used this feature, the synthesis of a variety of cyclopentadienyl lanthanide Complex. Just because most of these complexes are powdery and difficult to get the data of X-ray structure analysis, we imagine to synthesize the corresponding organic compounds to observe the structure.The results show that, unlike most cyclopentadienes, Of the carboxylic acid ester group