English

Noun

mercapto ‎(uncountable)

1. (organic chemistry, especially in combination) The univalent radical -SH
   • 2015 July 6, “Hydrogen Peroxide Scavenging Activity of Novel Coumarins Synthesized Using Different Approaches”, in PLOS ONE, DOI:10.1371/journal.pone.0132175:

     The postulated mechanism for the reaction of coumarin 4 as an antioxidant, as indicated in Fig 3 , relies on the mercapto hydrogen atom (bold), which is under the influence of resonance and inductive effects.