Mercapto Group Definition

This is the chemical structure of cysteine.
This is the chemical structure of cysteine. The yellow SH on the left hand side is a mercapto group. Todd Helmenstine

Definition: A mercapto group is a fuctional group containing a sulfur atom bonded to a hydrogen atom. General formula: -SH

Also Known As: thiol group, sulfanyl group

Examples: The amino acid cysteine contains a mercapto group.

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Helmenstine, Anne Marie, Ph.D. "Mercapto Group Definition." ThoughtCo, Jun. 13, 2014, thoughtco.com/definition-of-mercapto-group-605335. Helmenstine, Anne Marie, Ph.D. (2014, June 13). Mercapto Group Definition. Retrieved from https://www.thoughtco.com/definition-of-mercapto-group-605335 Helmenstine, Anne Marie, Ph.D. "Mercapto Group Definition." ThoughtCo. https://www.thoughtco.com/definition-of-mercapto-group-605335 (accessed January 17, 2018).