“…For CH 3 Cl the non-deuterated species was used, as spectral congestion was not an issue for this Lewis base. The assignment of CHF 2 I (Nagels et al, 2014), TMP (McKean et al, 1990), TMP-d 9 (Michielsen et al, 2012), DMS (Hauchecorne et al, 2011), DMS-d 6 (Michielsen et al, 2012) and CH 3 Cl (Futami et al, 2004;Duncan & Law, 1990; Barnes et al, 1973;Jones et al, 1966) is primarily based on experimental studies available in the literature, aided by ab initio calculations, for which the results can be found in Tables S3 to S9 of the supporting information.…”