Rochester Park (17 Oct 2007)

More pictures: Rochester Park (17 Oct 2007)

CM 2132 Expt 6

CM 2132 Expt 6
The System of Sodium Carbonate-Water, Transition Points

Punggol (14 Oct 2007)

Punggol (14 Oct 2007)















See also: Punggol (14 Oct 2007)

Raffles Country Club (12 Oct 2007)

Raffles Country Club (12 Oct 2007)











More pictures: Raffles Country Club

Super Import Night Roadshow @ Orchard Cineleasure

Super Import Night Roadshow @ Orchard Cineleasure













More pictures: Super Import Night Roadshow

CM2142 Expt2.5 and 2.9

CM2142 Expt2.5 and 2.9
Expt 2.5 - Identification of Synthetic Food colors by Thin Layer Chromatography
Expt 2.9 - Water Analysis













See also: CM2142 Expt 2.5 and Expt 2.9

CM2121 Expt 2

CM2121 Expt 2
a) Protection of 1-Phenylethanol by 3,4-Dihydro-2H-pyran
b) Purification of 2-(1-Phenylethoxy)-tetrahydro-2H-pyran by Flash Column Chromatography




Starting material (1-Phenylethanol)


1-Phenylethanol with 3,4-Dihydro-2H-pyran and anhydrous ether in cold bath with calcium chloride guard tube.


Toluenesulfonic acid monohydrate added and stirring with magnetic stirrer.


TLC with hexane:ethyl acetate (4:1) solvent system to confirm convertion


Washing of organic layer with saturated sodium bicarbonate solution followed by saturated sodium chloride solution.


Remove the solvents using the rotary evaporator




Flash Column Chromatography



See also: CM2121 Expt 2