Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (6): 20250366.doi: 10.7503/cjcu20250366

• Organic Chemistry • Previous Articles     Next Articles

Interaction of Water to the Complexation of Lewis Acids and Bases

CHEN Qiao1, GAO Mengyue2, WEN Zhiguo1, TIAN Chong1(), NIE Wanli3()   

  1. 1.Sichuan Province Key Laboratory of Natural Products and Small Molecule Synthesis,College of New Energy Materials and Chemistry,Leshan Normal University,Leshan 614000,China
    2.Institute of Environment and Safety,Wuhan Academy of Agricultural Sciences,Wuhan 430072,China
    3.Department of Materials Science,Shenzhen MSU?BIT University,Shenzhen 518172,China
  • Received:2025-12-03 Online:2026-06-10 Published:2026-01-10
  • Contact: TIAN Chong E-mail:tianchong30@163.com;niewl126@126.com
  • Supported by:
    the Wuhan Academy of Agricultural Sciences 2025 Innovation Project Youth Innovation Program, China(QNCX202521);the Crystalline Silicon Photovoltaic New Energy Research Institute Open Project, China(2022CHXK0012);the Leshan Normal University Project, China(TRCWYXFZCH2022B03)

Abstract:

This work systematically investigates the coordination and interconversion behaviors of tris(pentafluorophenyl)borane(BCF) with eleven substituted amines in the presence of varying amounts of water, employing 11B/19F-NMR spectroscopy and theoretical calculations. The catalytic activity of these systems in reactions with phenylsilane was further explored. The results indicate that the amine/BCF/H2O systems primarily exist in three coordination modes: B—N coordination, boronium hydroxide(B—OH) species, and a three-component hydrogen-bonded complex of the type “LB···H—(H)O···LA”. When the molar ratio of H2O reaches or exceeds that of BCF, the coordination equilibrium shifts significantly toward the hydrated three-component form. This shift markedly alters the protonation capability of the substrates and their reactivity in silane reduction, thereby determining the activation pathway with PhSiH3. This study not only provides experimental evidence to elucidate the reaction mechanisms of boranes under aqueous conditions but also offers theoretical and practical guidance for designing and expanding Frustrated Lewis Pairs(FLPs) catalytic systems in aqueous environments.

Key words: Water, Amines, Tris(pentafluorophenyl)borane(BCF), Lewis acid, Lewis base

CLC Number: 

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