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Mononuclear Calcium Complex for Effective Alkenes Hydrogenation
Chemical Communications ( IF 6.164 ) Pub Date : 2020/03/25 , DOI: 10.1039/d0cc01745k
Xianghui Shi; Cuiping Hou; Lanxiao Zhao; peng deng; Jianhua Cheng

Hydrogenolysis of the scorpionate-supported calcium benzyl complex [(TpAd,iPr)Ca(p-CH2C6H4-Me)(THP)] (TpAd,iPr = hydrotris(3-adamantyl-5-isopropyl-pyrazolyl)borate, THP = tetrahydropyran) (2-THP) afforded the mononuclear calcium hydrido complex [(TpAd,iPr)Ca(H)(THP)] (3). Under mild conditions (40 oC, 10 atm H2, 5 mol% cat.), complex 3 effectively catalyzed hydrogenation of a variety of alkenes, including activated alkenes, semi-activated alkene, non-activated terminal and internal alkenes. Mononuclear calcium unsubstituted alkyl complex [(TpAd,iPr)Ca{(CH2)4Ph}(THP)] (6), proposed as the catalytic hydrogenation intermediate, was isolated and structurally characterized.
更新日期:2020-03-26

 

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