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BH3 Activation by Phosphorus-Stabilized Geminal Dianions: Synthesis of Ambiphilic Organoborane, DFT Studies, and Catalytic CO2 Reduction into Methanol Derivatives
ACS Catalysis ( IF 11.3 ) Pub Date : 2016-04-12 00:00:00 , DOI: 10.1021/acscatal.6b00587
Mathieu Lafage 1 , Anthony Pujol 1 , Nathalie Saffon-Merceron 2 , Nicolas Mézailles 1
Affiliation  

The reaction of the geminal dianion (SCS)2–1 with 2 equiv of BH3·SMe2 leads to the isolation and full characterization of the new organoborane [(SCS)BH2][Li(THF)2] 2, in which the C═B bond possesses ambiphilic, multiple character. Treatment of 2 with another 1 equiv of BH3·SMe2 allows the isolation of the rare cyclic diborane species [(SCS)B2H5][Li(OEt2)] 4. The electronic structures of both compounds were investigated by means of DFT calculations. Compound 4 is an efficient catalyst for the reduction of CO2 to methanol derivatives by BH3·SMe2. A TON of ca. 2800 (TOF = 127 h–1) was achieved using 0.1 mol % of 4 in THF.

中文翻译:

磷稳定的二元阴离子对BH 3的活化作用:两亲性有机硼烷的合成,DFT研究以及将CO 2催化还原成甲醇衍生物

偕二价阴离子的反应(SCS)2- 1与2 BH的当量3 ·SMe的2通到分离和新有机硼烷的全面表征[(SCS)BH 2 ] [李(THF)2 ] 2,其中C═B键具有歧义,多重特征。的治疗2与另一1个当量的BH 3 ·SMe的2允许稀有环状乙硼烷物质的隔离[(SCS)乙2 ħ 5 ] [李(OET 2)] 4。通过DFT计算研究了这两种化合物的电子结构。化合物4是一种通过BH 3 ·SMe 2将CO 2还原为甲醇衍生物的有效催化剂。一吨约。使用0.1 mol%的4在THF中的溶液,可达到2800(TOF = 127 h –1)。
更新日期:2016-04-12
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