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不久前,我们报道了丁二烯三羰基铁和异戊二烯三羰基铁与亲核试剂芳基锂在低温下反应,再用Et_3OBF_4烷基化,可分别获得一族新奇的异构化的丁二烯-和异戊二烯二羰基[乙氧基(芳基)卡宾]铁配合物。我们又发现环辛四烯三羰基铁与芳基锂进行类似的反应,也不生成正常的环辛四烯配位的卡宾配合物,而是得到一系列具有新奇结构的环辛四烯二羰基[乙氧基(芳基)卡宾]铁的异构化产物和(或)环辛三烯三羰基芳基铁配合物。这些产物的结构显示了烯烃在金属化合物中的键合方式是复杂多样的,十分令人感兴趣。因此,我们选择了含奇数碳的环状共轭三烯配体的环庚三烯三羰基钼和铬,在类似的条件下与芳基锂进行反应,以研究不同种类的烯烃配体和不同中心金属对反应产物的影响。
Not long ago, we reported that the reaction between butadiene ferric tricarbonyl iron and isoprenic iron carbonyl and aryl nucleophile aryl lithium at low temperature, followed by alkylation with Et3OBF4 gave a novel family of isomerized Diene- and isoprene dicarbonyl [ethoxy (aryl) carbene] iron complexes. We also found that cyclooctatetraenetrithiocarbonyl iron and aryllithium for a similar reaction, nor the normal cyclooctatetraene coordination carbene complexes, but to have a series of novel structure cyclooctatetraene dicarbonyl Isomerization products of [ethoxy (aryl) carbene] iron and (or) cyclooctatrite tricarbonylaryl iron complex. The structure of these products shows that the bonding of olefins to the metal compounds is complex and diverse and very interesting. Thus we chose cycloheptatrometano-molybdenum and chromium containing odd-numbered cyclic conjugated triene ligands to react with aryllithium under similar conditions to study different kinds of olefinic ligands and different Effect of center metal on reaction product.