Esterification Of Glucose

Object: The purpose of this prove is to perform an esterification on glucose to bombinate off glucose penta acetate, and to compare the thawing point and specific rotation of the convergence to the literature info to confirm which of the ?- and ?-anomers is the major merchandise of the reaction. comparison: Experimental info and Observations: plug-in 1. Reagents heterogeneous| MW(g/ counterspye)| utilise| mole| Physical and refuge Data| Acetic anhydride,C4H6O3| 102.09 | 20 mL| 2.12 x 10-1| bp 138-140 oC, d 1.08 g/ mL. Lachrymator. Flammable. Corrosive. Harmful by consumption and swallowing.| Sodium acetate,NaOAc (NaC2H3O2)| 82.03 | 4 g| Catalyst| harmful in large amounts. bittie amounts may be swear out mountain the sink.| Glucose| 180.16| 4 g| 2.22 x 10-2| Combustible. Explosive. Limiting reagent.| slacken 2. Products blend| MW(g/ mole)| Isolated| Moles| hand| Physical Data| Glucose pentaacetate| 390.34| 6.06 g| 1.55 x 10-2| 69.82 %| May be harmful if inhaled, swallowed or engrossed through skin. May reason eye irritation.| Table 3. thawing manoeuver Compound| Literature melt Point| Experimental thawing Point| Glucose pentaacetate| ?-glucose pentaacetate: 109 - 111 oC?-glucose pentaacetate: 130 132 oC| 117 121 oC| Table 4.

Polarimetry Data Compound| Mass (g)| multitude (mL)| dumbness (g/mL)| ? (at 589nm)| Length (dm)| [?] (o)| Glucose pentaacetate| 0.2| 25| 0.008| 0.11| 1.0| + 13.75| Table 5. NMR abstract ?| integrating| Municipality| J value| Assignment| 6.28| 1.00| doublets| 3.6| alkenyal CH| 5.67| 35.5| doublets| 8.2| alkenyal CH| Calculations: % Yield = (experimental/ theoretical) x snow By moles: (1.55 x 10-2 mol/ 2.22 x 10-2 mol) x 100 = 69.82 % Polarimetry: Glucose pentaacetate: slow-wittedness = 0.2 g/ 25 mL = 0.008 g/ mL [?] = (?)/ (l x c) = 0.11 / (1 x 0.008) = + 13.75 o Discussion: The esterification of glucose in the presence of sodium acetate as a...If you want to delineate a full essay, vow it on our website: Ordercustompaper.com

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