thioacetal
thioacetal
The sulfur analogue of 'acetal'.  The term includes monothioacetals having the structure R<small><sub>2</sub></small>C(OR')(SR') (subclass monothioketals, R ≠ H); and dithioacetals having the structure R<small><sub>2</sub></small>C(SR')<small><sub>2</sub></small> (subclass dithioketals, R ≠ H, R' ≠ H).