Synthesis of cationic cobaltocenophane monomers: Isomerization and ring-opening metathesis polymerization
Synthesis of cationic cobaltocenophane monomers: Isomerization and ring-opening metathesis polymerization
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阳离子钴茂单体的合成：异构化和开环复分解聚合
DOI：
10.1016/j.polymer.2022.124544
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发表时间：
2022
期刊：
影响因子：
4.6
通讯作者：
Tang, Chuanbing
中科院分区：
文献类型：
--
作者：
Cha, Yujin;Hwang, JiHyeon;Ramos, Luis;Lin, Huina;Zhu, Tianyu;Tang, Chuanbing
我们报道了环状钴烯(阳离子钴茂金属或钴-钴)的合成。这种环状钴是通过二烯丙基钴的闭环歧化反应(RCM)得到的，后者异构化为两个不同的钴双烯。计算结果表明，端烯在较高温度下发生异构化，可以得到热力学上更稳定的内烯。这些异构体的RCM产生了两种不同的环状钴镉单体[3]-和[4]-ANSA-钴镉，它们被进一步评价为开环歧化聚合(ROMP)的单体。结果表明，两种单体均可与环辛烯衍生物发生共聚反应，得到主链钴镉共聚物。
We report the synthesis of cyclic cobaltocenium olefins (cationic cobaltocenophane oransa-cobaltocenium). This cyclic cobaltocenium is prepared by ring-closing metathesis (RCM) of diallyl cobaltocenium, which isomerizes into two different cobaltocenium dienes. The isomerization of the terminal alkene at higher temperature results in thermodynamically more stable internal alkene, which is supported by the computational calculation. RCM of these isomers produces two different cyclic cobaltocenium monomers [3]- and [4]-ansa-cobaltocenium, which are further evaluated as monomers for ring-opening metathesis polymerization (ROMP). The results indicate that bothansa-cobaltocenium monomers can be copolymerized with cyclooctene derivatives towards main-chain cobaltocenium-containing copolymers.