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Provethat sucroseis (i) invertsugar (ii) non - reducingsugar. |
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Answer» SOLUTION :(i) Sucroseis an invertsugar : SUCROSE `(+66.6^(@))` and glucose`(+52.5^(@))`are dextro rotatorycompounds whilefurcostein levo rotatory`(-92.4^(@))` . Duringhydrolysis of sucrose , theopticalrotationof thereactionmixturechanges fromdextroto levo. Hencesucrose is alsocalledinvertsugar. (ii) In sucrose`C_(1)`of `ALPHA ` - Dglucoseis joinedto `C_(2)`of `alpha`- Dfructose . Theglycosidicbondthusformedis called`alpha` - 1, 2 - glycosidic bond . Sinceboth thecarbonyl carbonscarbons(reducinggroups) are involvedin the glycosidicbonding , surcoseis a non - reducingsugar. |
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