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[mass noun] A viscous liquid obtained when acetaldehyde dimerizes in dilute alkali or acid.
- ‘The simplest aldol - CH 3 CHOHCH 2 CHO - is produced from ethanal.’
- ‘Several epoxy ketones were converted to aldols in good yields upon irradiation.’
- ‘The most useful mixed Aldols are those where only one reactent can form an enolate.’
- ‘Aldols are bifunctional molecules possessing OH and C=O groups, which are able to act as both hydrogen donors and/or acceptors.’
- ‘The structures of cycloalkanone-based threo and erythro aldols were investigated by systematic introduction of stereo-determining factors.’
Late 19th century: from al(dehyde) + -ol.
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