Bromination Of Trans-Stilbene Lab Report
LAB REPORT!
EXPERIMENT#5,6! MANPREET KAUR KHAIRA! LAB PARTNER: VIAN RAIES!
The purpose of this lab exercise was to perform the bromination of (E)-1,2-diphenylethene (trans-stilbene) by addition reaction in which bromine was added across the double bond to yield a vicinal dibromide. The next step was to perform a double elimination reaction by product gained to synthesize an alkyne, that is, 1,2-diphenylacetylene. The two major techniques used in this lab were TLC analysis and UV-vis spectroscopy. TLC technique is non-destructive, that is, the molecules in the mixtures are separated physically without being chemically altered. Analytical TLC is used in drug analysis, consumer product monitoring, environmental pollution! studies, forensics and many other applications. Further, UV-vis method is based …show more content…
This separation technique is based on the principal that under the same conditions, the time between the injection of a component into the column and the elution of that component is constant. This characteristic is used to perform qualitative or quantitative analysis. Thin-layer chromatography (TLC) is a chromatography technique used to separate non-volatile mixtures. Thin-layer chromatography is performed on a sheet of glass, plastic, or aluminium foil, which is coated with a thin layer of adsorbent material, usually silica gel, aluminium oxide, or cellulose. A small amount of the mixture to be analyzed is spotted near the bottom of this plate. The TLC plate is then placed in a shallow pool of a solvent in a developing chamber so that only the very bottom of the plate is in the liquid. This liquid, or the eluent, is the mobile phase, and it slowly rises up the TLC plate by capillary action. The underlined principle is that the components will differ in solubility and in the strength of their adsorption to the adsorbent and some components will be carried farther up the plate than
EXPERIMENT#5,6! MANPREET KAUR KHAIRA! LAB PARTNER: VIAN RAIES!
The purpose of this lab exercise was to perform the bromination of (E)-1,2-diphenylethene (trans-stilbene) by addition reaction in which bromine was added across the double bond to yield a vicinal dibromide. The next step was to perform a double elimination reaction by product gained to synthesize an alkyne, that is, 1,2-diphenylacetylene. The two major techniques used in this lab were TLC analysis and UV-vis spectroscopy. TLC technique is non-destructive, that is, the molecules in the mixtures are separated physically without being chemically altered. Analytical TLC is used in drug analysis, consumer product monitoring, environmental pollution! studies, forensics and many other applications. Further, UV-vis method is based …show more content…
This separation technique is based on the principal that under the same conditions, the time between the injection of a component into the column and the elution of that component is constant. This characteristic is used to perform qualitative or quantitative analysis. Thin-layer chromatography (TLC) is a chromatography technique used to separate non-volatile mixtures. Thin-layer chromatography is performed on a sheet of glass, plastic, or aluminium foil, which is coated with a thin layer of adsorbent material, usually silica gel, aluminium oxide, or cellulose. A small amount of the mixture to be analyzed is spotted near the bottom of this plate. The TLC plate is then placed in a shallow pool of a solvent in a developing chamber so that only the very bottom of the plate is in the liquid. This liquid, or the eluent, is the mobile phase, and it slowly rises up the TLC plate by capillary action. The underlined principle is that the components will differ in solubility and in the strength of their adsorption to the adsorbent and some components will be carried farther up the plate than