One of the mysteries of the English language finally explained.
as modifier Of or denoting the toluene-4-sulphonyl radical —SO₂C₆H₄CH₃, used in organic synthesis.
- ‘In all experiments superparamagnetic particles of 4.5-m diameter (Dynabeads, Dynal, Hamburg, Germany) exhibiting reactive tosyl groups on the surface were used as magnetic tweezers.’
- ‘The choice of TsSePh, rather than a tosyl halide, as the precursor of tosyl radical is based on the greater stability of the resulting selenides with respect to elimination compared to the halides.’
1930s: from German, from to(luol) and s(ulphon)yl.
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