Table 2 H/D isotope effects*.

From: Enhancing the catalytic activity of hydronium ions through constrained environments

Reactant TOF
  H3PO4 (10−3s−1) HBEA (10−2s−1)
C6H11OH 3.5±0.2 5.5±0.3
C6D11OD§ 1.2±0.1 1.9±0.1
KIE 3.0±0.4 2.9±0.3
  1. KIE, kinetic isotope effect; TOF, turnover frequency.
  2. *Reactant conversions were kept at 5–10% and dicyclohexyl ether selectivities at 0–2%; cyclohexanol and perdeuterated cyclohexanol were dissolved in unlabelled water (0.1 M); 98 atom% isotopic purity for C6D11OD.
  3. At 180 °C.
  4. At 170 °C.
  5. §Forming C6D11OH on exchange with H2O.