conformation. To contrast the effect of subtle ligand changes, we also report the synthesis and characterization of [bis-5,5'-(2,2-dimethyl-1,3-propanediyldiimino)-2,2-dimethyl-4-hexene-3-onato]sam arium[bis(trimethylsilyl)amido], having gem-dimethyl substituents appended to the propylene bridge central carbon. The six-membered diamine chelate ring in this compound adopts the chair conformation without metal-hydrocarbon
两种单体的五配位
镧系元素络合物,[bis-5,5'-(1,3-丙二基二亚
氨基)-2,2-二甲基-4-己烯-3-onato] sa [2,6-bis(叔丁基)-4-甲基苯氧基]和[bis-5,5'-(1,3-丙二基二亚
氨基)-2,2-二甲基-4-己烯-3-onato] er [2,6-bis(叔丁基)从2,6-双(叔丁基)-4-甲基
苯酚与[bis-5,5'-(1,3-丙二基二亚
氨基)-2,2-二甲基-4 -己烯-3-onato]
镧系元素[双(叔甲基甲基甲
硅烷基)酰胺基](
镧系元素= Er(3+)和Sm(3+))。纯化的
酚盐以优异的收率和分析纯度回收,反应进行得很干净,没有席夫碱降解或簇形成。类似地,[双-3,3'-(1,3-
丙烷二基二亚
氨基)-
1-苯基-2-丁烯-1-氧] er [双(三甲基甲
硅烷基)酰胺基]也直接转化为[双-3,3 '-(1,3-丙二基二亚
氨基)-
1-苯基-2-丁烯-1-氧]