thiohemiacetal
thiohemiacetal
The sulfur analogue of 'hemiacetal'. The class includes compounds of structure R<small><sub>2</sub></small>C(SR')OH or R<small><sub>2</sub></small>C(OR')SH (monothiohemiacetals), or R<small><sub>2</sub></small>C(SR')SH (dithiohemiacetals), R' ≠ H .