Esarte Palomero Orhi, Jones Richard A
Department of Chemistry - The University of Texas at Austin, 105 E 24th St., Austin, TX 78712, USA.
Dalton Trans. 2022 Apr 20;51(16):6275-6284. doi: 10.1039/d2dt00691j.
The synthesis and reactivity of novel ferrocene tethered boramidinate frustrated Lewis pairs (FLPs), capable of the sequential capture of small molecules, is reported. Reactions of 1,1'-dicarbodiimidoferrocenes with different boranes provides access to metallocene tethered FLPs. The reactivity of the boramidinate moieties can be tuned by the nature of the carbodiimido substituents (alkyl aryl) and the borane used in the reduction (9-borabicyclo[3.3.1]nonane [(CH)BH] bis-pentafluorophenyl borane [(CF)BH]). The boramidinate FLP arms do not engage in intramolecular reactions, allowing for independent small molecule capture by each FLP. By careful synthetic control, sequential capture of different gaseous small molecules (CO and CO or CO and CNBu) by the same bis(boramidinate)ferrocene molecule has been demonstrated.
报道了新型二茂铁连接的硼脒基受阻路易斯酸碱对（FLPs）的合成及其反应活性，该酸碱对能够依次捕获小分子。1,1'-二碳二亚胺二茂铁与不同硼烷的反应可得到金属茂连接的FLPs。硼脒基部分的反应活性可通过碳二亚胺取代基（烷基、芳基）的性质以及还原反应中使用的硼烷（9-硼双环[3.3.1]壬烷[（CH）BH]、双五氟苯基硼烷[（CF）BH]）来调节。硼脒基FLP臂不参与分子内反应，使得每个FLP能够独立捕获小分子。通过精细的合成控制，已证明同一双（硼脒基）二茂铁分子能够依次捕获不同的气态小分子（CO和CO或CO和CNBu）。
