as they are formed with a de of 90%. 1H NMR studies indicate that the compounds are configurationally stable at the cobalt center. Reaction of these species with neutral ligands such as phosphines, phosphites, or isocyanides led to the formation of cationic complexes via substitution of the iodide ligand, this reaction occurring mainly with retention of configuration for the optically active species
一系列邻-锂化的叔胺衍生物的(N之间的转移金属化反应∧ C-Li)和[(η 5 -C 5 H ^ 5)的Col 2 ] 2次,得到一系列的一般形式的化合物cobaltacyclic的(η 5 -C 5 H 5)Co(C∧N)I,其中钴中心处于拟四面体环境中。与光学活性的锂化化合物,例如从(R)-或(S)-1-(二甲基氨基)-1-苯基乙烷获得的化合物,反应形成两种非对映异构体(R C ,R Co)-12a的混合物,(R C ,S Co)-12a '和(S C ,R Co)-12b',(S C ,S Co)-12b '分别为异构体12a和12b '拥有90%的收益率。1个1 H NMR研究表明该化合物在钴中心处构型稳定。这些物质与中性配体如膦,亚磷酸酯或异氰酸酯的反应导致通过碘化物配体的取代而形成阳离子配合物,该反应主要发生在保留旋光性物质的构型的情况下。
Amino−Organolithium Compounds and their Aggregation for the Synthesis of Amino−Organoaluminium Compounds
study of small, easily accessible amino−organolithium compounds with bridging phenyl and naphthyl moieties. Their crystal structures most likely represent their aggregation as tetramers and dimers in both hydrocarbon and ethereal solvents. These amino−organolithium compounds were further used to generate their corresponding aluminium compounds as a model system. Their crystal structures are reported