Dimesitylborane monomer-dimer equilibrium in solution, and the solid-state structure of the dimer by single crystal neutron and X-ray diffraction

CD Entwistle, TB Marder, PS Smith, JAK Howard…

Index: Entwistle, Christopher D.; Marder, Todd B.; Smith, Philip S.; Howard, Judith A.K.; Fox, Mark A.; Mason, Sax A. Journal of Organometallic Chemistry, 2003 , vol. 680, # 1-2 p. 165 - 172

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Citation Number: 27

Abstract

Dimesitylborane dimer has been shown to exist in equilibrium with dimesitylborane monomer in solution. This equilibrium has been investigated by variable concentration and variable temperature multinuclear NMR spectroscopy and values for the dissociation constant, enthalpy and entropy of dissociation were found to be Kdiss=(3.2±0.4)× 10− 3 M, ΔH= 70 kJ mol− 1, and ΔS= 212 JK− 1mol− 1, respectively. Ab initio methods have been ...