Wednesday, October 31, 2007

CM2121 Expt3

CM2121 Expt3
a) Synthesis of Grignard Reagent p-Tolylmagnesium Bromide
b) Grignard Synthesis of p-Toluic Acid


Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket

More pictures: CM2121 Expt3

Wednesday, October 24, 2007

Preparation and IR Spectral Analysis of oxovanadium acetylacetone and its pyridine adduct (24 Oct 2007)

Preparation and IR Spectral Analysis of oxovanadium acetylacetone and its pyridine adduct (24 Oct 2007)

Preparation of VO(acac)2
Photo Sharing and Video Hosting at Photobucket
Starting material:
- 5ml deionised water
- 5mml concentrated Sulfuric acid
- 18ml ethanol
- 2g of vanadium pentoxide (V2O5)

Photo Sharing and Video Hosting at Photobucket
Reflux

Photo Sharing and Video Hosting at Photobucket
Reflux for an hour while swirling the contents in the RBF every 10-15minutes

Photo Sharing and Video Hosting at Photobucket
Filter using cotton wool

After adding 6ml of acetylaceton dropwise to the filtrate, the mixture is neutralised with 20g of sodium carbonate in 120ml water.

Photo Sharing and Video Hosting at Photobucket
The mixture is then cooled in ice bath.

Photo Sharing and Video Hosting at Photobucket
It is then filtered using suction pump.

The product of VO(acac)2 is obtained.

------------------------------------------------------------------------
Preparation of VO(acac)2py

Photo Sharing and Video Hosting at Photobucket
0.5g of VO(acac)2 is dissolved in 20ml of toluene and reflux vigorously with 2ml pyridine for 45min

Photo Sharing and Video Hosting at Photobucket
The product is being dried by using the rotary evaportor

Photo Sharing and Video Hosting at Photobucket

Photo Sharing and Video Hosting at Photobucket
The product

------------------------------------------------------------------------
Preparation of the sample for recording the infra-red spectrum

Photo Sharing and Video Hosting at Photobucket
A small portion is being grinded with an agate mortar and pestle with Nujol added.

Photo Sharing and Video Hosting at Photobucket
The Nujol mull is being spreaded on the sodium chloride disc and inserted into its holder.

Photo Sharing and Video Hosting at Photobucket
The infra-red

See also: Preparation and IR Spectral Analysis of oxovanadium acetylacetone and its pyridine adduct (24 Oct 2007)