. 2017 May 25;8:15442. doi: 10.1038/ncomms15442

Table 2. The ¹⁸O exchange during aqueous-phase cyclohexanol dehydration.^*.

Catalyst	¹⁸O in the recovered alcohol (%)^†	Conversion (%)
MFI, 433 K	32±2	22
BEA, 453 K	10±1	19
H₄SiW, 453 K	16±1	15

^*Extent of ¹⁸O exchange from H₂¹⁸O (97% isotopic purity) into unlabelled cyclohexanol and its conversion during dehydration (cyclohexanol concentration: 0.30 M in H₂¹⁸O).

^†Determined from the intensity ratio between fragment ions m/z 57 and 59 in the MS fragmentation patterns (Supplementary Fig. 10) and error bars reflect the uncertainties in this ratio.

Table 2. The 18O exchange during aqueous-phase cyclohexanol dehydration.*.

Table 2. The ¹⁸O exchange during aqueous-phase cyclohexanol dehydration.^*.