Getting Holmium to React

  • ChemPubSoc Europe Logo
  • Author: Francesca Rita Novara
  • Published Date: 06 April 2016
  • Source / Publisher: Chemistry – A European Journal/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
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Bare holmium(I)ions are known for being quite unreactive. However, Helmut Schwarz and colleagues, Technical University Berlin, Germany, found a reaction in which holmium does function in the activation of toluene. The team investigated the thermal reaction of [Ho(CH2S)]+ with toluene to produce [C6H5CHSHo]+ and CH4 using Fourier-transform ion cyclotron resonance mass spectrometry (FT-ICR MS), complemented by density functional theory (DFT) calculations.

According to the researchers, the Ho+ ion converts the closed-shell substrate CH2S to a "prepared" state ([Ho(CH2S)]+). It possesses a carbon radical and is then capable of hydrogen-atom transfer from toluene. Using this approach, a sequence of hydrogen-atom abstractions combined with the making and breaking of C‒S, S‒Ho, and C‒H bonds are permitted.


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