Methylcyclohexene Lab Report
A control was used to compare the reactant and the product, showing a clear appearance that would indicate an alkene being present. Bromine was added to the reactant 4-methylcyclohexanol, and a reddish-brown color appeared, indicating that no reaction took place. Bromine was then added to the product 4-methylcyclohexene, and the clear appearance of the product remained, concluding that an alkene is indeed present. Discussion Given the results obtained post-experiment, the percent yield was calculated to be about 35.5%, which may suggest that either product was lost at some point during the experiment, or side product was formed. Regarding the unsaturation test, the bromine test was performed and produced the expected result since the 4-methylcyclohexene had a clear appearance after 5 drops of bromine were added to it, which revealed that the alcohol was eliminated and a carbon-carbon double bond …show more content…
Based on the result from the bromine test conducted, the clear appearance of the 4-methylcyclonexene demonstrated that the bromine had all been used up, and there is an unsaturated compound present. Infrared spectroscopy was another method of identifying an alkene. Figures 1 and 2 show the IR spectra for the reactant (4-methylcyclohexanol) and the product (4-methylcyclohexene), respectively; each were compared and analyzed. The IR spectrum for 4-methylcyclohexanol revealed a broad peak at 3328 cm-1, signifying an OH group and therefore an alcohol. In contrast, the IR spectrum for 4-methylcyclohexene no longer showed that broad band, but instead displayed a sharp peak at 1651 cm-1, representing a double bond and therefore an alkene. With this, the reaction of 4-methylcyclohexanol with a strong acid (H3PO4) acting as a catalyst was successful, and the product 4-methylcyclohexene was obtained as
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1804 Words | 8 PagesAfter 28 minutes, the mixture stopped boiling, and approximately 4.5 ml of bromobenzene was added drop by drop in the mixture, and color of the mixture was turned light brown orange. Then, the phenylmagnesium bromide was cooled in ice bath for a few minutes, and 10 ml of anhydrous diethyl ether was added in the mixture by using the syringe. After that, approximately 2.3 ml of methyl benzoate was added to the reaction, and it was added slowly slowly because the reaction was exothermic which needed to be cool in order to maintain a gentle reflux. Once all the methyl benzoate solution was added, the heating mantle was removed from the reaction flask and was cooled to the room temperature. During the reaction, a milky white salt began to precipitate, and the reaction flask was swirled for ten minutes until most of the reaction became visibly subdivided.
Nucleophilic Substitution Lab Report
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Unknown Compound
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Synthesis Of Vanillin Lab Report
472 Words | 2 PagesAs the name implies, the bromination mechanism in an electrophilic aromatic substitution reaction that replaces an atom on the ring with a bromine atom. The addition of the bromine is driven by the presence of a Lewis acid catalyst and a bromine atom. In most bromination mechanisms, liquid bromine is the preferred reagent to complete the reaction. However, due to potential safety concerns, the aromatic ring was brominated by using a compound of hydrobromic acid and potassium bromate in an acetic acid solution (see Figure 2 for the bromine formation).1 Liquid bromine is known for generating hazardous fumes, so this solution is significantly safer for bromine production. This formation of bromine is crucial for the bromination reaction to
Bromohexane Lab Report
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2-Bromobutane Lab Report
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Dehydration Of 2-Methylcyclohexanol Lab Report
967 Words | 4 PagesDehydration of 2-Methylcyclohexanol Sura Abedali Wednesday 2:00 PM January 31, 2018 Introduction: Dehydration reactions are important processes to convert alcohols into alkenes. It is a type of elimination reaction that removes an “-OH” group from one carbon molecule and a hydrogen from a neighboring carbon, thus releasing them as a water molecule (H2O) and forming a pi bond between the two carbons1. In this experiment, 2-methylcyclohexanol undergoes dehydration to form three possible products: methylenecylcohexane, 1-methylcyclohexene, and 3-methylcyclohexene in a Hickman still apparatus. Adding 85% Phosphoric Acid to protonates the “-OH” group, turning it into a better leaving group and initiating the dehydration reaction.
Tetraphenylnaphthalene Lab Report
779 Words | 4 PagesBenzyne Formation and the Diels-Alder Reaction Preparation of 1,2,3,4 Tetraphenylnaphthalene Aubree Edwards Purpose: 1,2,3,4-tetraphenylnaphthalene is prepared by first producing benzyne via the unstable diazonium salt. Then tetraphenylcyclopentadienone and benzyne undergo a diels-alder reaction to create 1,2,3,4-tetraphenylnaphthalene. Reactions: Procedure: The reaction mixture was created. Tetraphenylcyclopentadienone (0.1197g, 0.3113 mmol) a black solid powder, anthranilic acid ( 0.0482g, 0.3516 mmol) a yellowish sand, and 1,2-dimethoxyethane (1.2 ml) was added to a 5-ml conical vial.
Lab Report Scaffold: Bromination Of Trans-Cinnamic Acid
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9-Fluorenone Lab Report
382 Words | 2 PagesNevertheless, the latter is not used in this experiment since it is very reactive and extremely flammable. On the contrary, NaBH4 is relatively mild and it can be used with protic solvents. In this manner, 1.507 grs of the ketone 9-fluorenone were mixed with 30.0 ml of 95% ethanol in a 125 ml Erlenmeyer flask. The bright yellow mixture was stirred during 7 minutes until all the components were dissolved.
Nucleophilic Substitution Reactions Lab
1039 Words | 5 PagesExperiment 2 Report Scaffold (Substitution Reactions, Purification, and Identification) Purpose/Introduction 1. A Sn2 reaction was conducted; this involved benzyl bromide, sodium hydroxide, an unknown compound and ethanol through reflux technique, mel-temp recordings, recrystallization, and analysis of TLC plates. 2. There was one unknown compound in the reaction that was later discovered after a series of techniques described above.
Methyl Trans-Cinnamate Lab Report
1399 Words | 6 PagesIt is understood the mechanism is acid-catalyzed where protons coordinate with the carbonyl oxygen to make the carbonyl carbon more electropositive for nucleophilic attack (Scheme 1). In the experimental procedure all reactants were added together, this is inefficient as the protons can coordinate with either trans-cinnamic acid or methanol. Coordination with methanol is unnecessary as it reduces its nucleophilicity and makes less protons available to coordinate with the carboxylic acid. To improve
Cyclohexane Research Paper
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Wittig Reaction Lab Report
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