化学
离域电子
结晶学
Atom(片上系统)
金属
拉伤
过渡金属
立体化学
有机化学
医学
计算机科学
内科学
嵌入式系统
催化作用
作者
Jian‐Hong Bian,Bo Jin,Yuewen Mu,Lingfei Hu,Xuefeng Zhao,Cheng-Yong Zhou,Caixia Yuan,Gang Lü,Yanbo Wu
标识
DOI:10.1021/acs.inorgchem.3c00864
摘要
[n]Cycloparaphenylenes ([n]CPPs, n denotes the number of phenyl groups) are difficult to synthesize because of the strain related to their bent phenyl rings. In particular, the strain in [3]CPP is high enough to destroy the π electron delocalization, leading to the spontaneous structural transition to an energetically more stable “bond-shift” (BS) isomer ([3]BS). In this contribution, we propose to achieve [3]CPP by enhancing the π electron delocalization through hosting a guest metal atom. Our computations revealed that Sc could stabilize [3]CPP by forming the [Sc©[3]CPP]+ complex through the favorable π-Sc donation–backdonation interactions. Thermodynamically, the binding energy between the Sc atom and [3]CPP was −205.7 kcal/mol, which could well compensate not only the energy difference of 44.2 kcal/mol between [3]CPP and [3]BS but also the extremely high strain energy of 170.3 kcal/mol in [3]CPP. Simultaneously, the [Sc©[3]CPP]+ complex is stable up to 1500 K in dynamic simulations, suggesting its high viability in the synthesis.
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