Cyclohexene Lab Report

2. The TLC results showed two different spots that traveled different distances on the TLC plate, one for ethyl vanillin and one for ethyl vanillin alcohol which proves there is no evidence of the starting material in our final product. The product (ethyl vanillin alcohol) was more polar and interacted more with the solvent than our starting material (ethyl vanillin). This increase in polarity is due to the extra alcohol group in the ethyl vanillin alcohol and the smaller Rf value also indicates it is more polar and pure than the ethyl vanillin.

When observed, the water was a blue-green all the way through. This is because the seal was more than likely not tight enough around the test tube, letting oxygen into the tube, which caused the color to change.

Procedure: In this experiment, various chemicals were mixed together, to determine a reaction. Using two drops from chemical 1 and two drops of chemical two, unless otherwise stated, then recording the type of physical reaction or color changes that occurred.

Introduction This experiment was undertaken in order to create stilbene dibromide. Bromine is added through electrophilic addition in attacking the double bond. This experiment was also executed to determine the stereochemistry of this addition reaction, whether it created meso products or d,l products. Data and Results Initially, 0.9 grams of stilbene were added to the solution.

The purpose of this experiment was to practice the functional group transformation procedure. The process of the experiment included the dehydration of 2-methylcyclohexanol in the presence of phosphoric acid and heat. The products that were formed from the reaction were 1-methylcyclohexene and 3-methylcyclohexene. The mass of the final product solution was 0.502g with a percent yield of 18.7% and a boiling point range of 84.5-98.5oC.

You may have done siinple experiments alkene can be quickly and easily differentiated from an alkane. to learn how an identified, and

Windex |B5|The windex was a blue similar to the bromthymol blue also, but there were some bubbles forming on the upper edge of the mixture. |

This was concluded by combining information on melting points and TLC; melting range narrowed when filtered product was mixed with the standard product. Also, the Rf value of the pure product is closely related to the Rf value of the standard. TLC of filtrate showed no movement of the substance in the mixture under 9:1 ratio declaring the substance to be extremely polar. Of the three potential unknown reactants, 4-methoxyphenol would be the most polar and therefore would travel least up the TLC plate. (Q14:Yield) 81.2% product yield was collected. “Matter cannot be created nor destroyed”, therefore some product could have filtered through. TLC of filtrate confirmed remnants of product present. Filtering the filtrate could have increased the yield. (Q15:Recovery) The percent recovery of the product makes sense because it is the mass of the crystallized product divided by the crude product: 94.9%. The percentage reflects the mass of pure product (without the presence of impurities). (Q16:MP) Melting point coincides with the unknown nucleophile being 4-methoxyphenol because when the standard product was combined with our pure product, the melting range narrowed. When compared to the melting ranges obtained when mixed with the other two possible products the melting ranges significantly decreased and widened. This is often an indication of impurities being present, but because this was a

The final product was erythro-2,3-dibromo-3-phenylpropanoic acid and its identity was confirmed by melting point of a range of 203.5-204.5 oC, which closely corresponds to standard of 204 oC. (Lehman). Since the melting point range is small, it confirms the purity of the product. The electrophilic addition of bromine yielded to erythro-2,3-dibromo-3-phenylpropanoic acid as an indication that the bromine was added in anti addition.

The bromination of the alkane was calculated and the overall percent yield was 96.35% with the percent yield with the calculated theoretical yield was 79.85%. The addition reaction was synthesized with a mechanism using 3 steps. The E-Stilbene reacted with pyridinium hydromide perbromide to form the pure (1R, 2S)-stilbene dibromide. One of the two diastereomeric products, the other would be dl(1R,2R + 1S,2S) stilbene dibromide.

The purpose of this lab is to investigate the processes that can be used to separate two volatile liquids in a mixture based on their chemical properties. This is accomplished by fractional distillation, which separates chemicals in a mixture by differentiating them by their boiling points at atmospheric pressure. Specifically in this lab, fractional distillation is used to separate an unknown mixture into its respective pure components. The components are then identified using gas chromatography, which is also telling of the purity of the extracts and success of the procedure. The procedure of this experiment was specified in lecture by Dr. Fjetland and in Gibert and Martin’s student lab manual, Experimental Organic Chemistry: A Miniscale and Microscale Approach, 6th Edition.

The purpose of this experiment is to identify an unknown substance by measuring the density and boiling point. I will be able to conclude which substance is my own from a list of known options stating what its real boiling point and density is.

In this experiment, a major constituent of volatile oils from eucalyptus leaves will be isolated as a pure compound with high purity via steam distillation. These essential oils are camphor and limonene and by using the gas chromatography technique, the different components of the eucalyptus essential oil will be separated. This experiment also aims to manipulate the gas chromatography system and change conditions in order to effectively and efficiently separate the components, and therefore achieve a good resolution. The components will be identified by determination of their retention times

The identification and characterization of the structures of unknown substances are an important part of Organic Chemistry. In this experiment a sample of an unknown aldehyde or ketone was obtained. From this sample two solid derivatives were prepared. Their melting points were obtained and compared to those listed in the Table of Aldehyde & Ketone Derivatives. From this the unknown sample was identified. As additional aid a Benedict’s test and Iodoform test were used. These are functional group tests used for distinguishing between aldehydes, ketones and methyl ketones. A Benedict’s test tests positive for aliphatic aldehydes and negative for aromatic aldehydes and ketones. An Iodoform test tests positive for methyl ketones and acetaldehyde

1. N-H stretching vibrations (secondary amine) Secondary amines show a single weak band in the 3350 - 3310 cm-1 region. These bands are shifted to longer wavelengths than primary amines due to hydrogen bonding. The position, intensity and the breadth of the band indicates whether the group is free, exhibit intermolecular hydrogen bonding.