Addition of dihydrogen to a borylborenium center

作者：Zheng, Junhao; Li, Zhen Hua^*; Wang, Huadong^*

来源：Chemical Science, 2018, 9(6): 1433-1438.

DOI：10.1039/c7sc04987k

• FRUSTRATED LEWIS PAIRS
• N-HETEROCYCLIC CARBENE
• FREE HYDROGEN ACTIVATION
• SIGMA-BOND METATHESIS
• BORENIUM CATIONS
• OXIDATIVE ADDITION
• H-2 BINDING
• BORANES
• REACTIVITY
• COMPLEXES

The activation of a H-H bond, the simplest covalent bond, is a fundamentally important process. Addition of H-2 to an elemental center typically occurs on low valent transition metal or main group complexes through oxidative addition to afford metal dihydride complexes. In contrast, activation of H-2 on a high valent center generally results in heterolytic cleavage of the H-H bond to a proton and hydride. Here, we report experimental and computational evidence for the addition of H-2 to a borenium center in an Nheterocyclic carbene (NHC) coordinated borylborenium cation, which leads to the formation of a dihydroborenium complex accompanied by the elimination of two sigma-bonded substituents, namely mesityl (Mes) and pinacolboryl (Bpin) groups, as mesitylboronic ester.

• 出版日期2018-2-14
• 单位复旦大学