85°C which is very close to the theoretical melting point of Fluorenone which is about 83 °C. Since the melting point was off by about 1.5°C it is assumed that some sources of error was obtained in the experiment. Since there was very little of the alkene in the sample‚ and none of it eluded out‚ it may have been stuck in the stationary phase. Hence when the ketone passed through the stationary phase it may have gotten contaminated leading to the error. Also all of the MTBE may not have evaporated
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Lab #24- Preparation 4-Methylcyclohexene Introduction: The goals in this lab were to have a reaction occur with 4-methylcyclohexanol and an acid catalyst to form our product of 4-methylcyclohexene via an E1 reaction. This reaction is accomplished by removing the –OH group on 4-methylcyclohexanol via dehydration and to have a double bond form via a loss of a hydrogen on a β-Carbon. Many techniques and skills were developed in this lab. Among them were dehydration‚ isolation‚ drying
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more than one pair of electrons are shared between two carbon atoms. Based on the nature of the carbon chain they are grouped as‚ * Chain form * Branched form * Ring form Alkane‚ Alkene and Alkyne…….. Alkane: Saturated hydrocarbons. Represented by a general form >> CnH2n+2 Alkenes: Unsaturated hydrocarbons. Double bond between two carbon atoms. Represented
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Dehydrating Cyclohexanol • Introduction The purpose of the lab experiment is to prepare cyclohexene from cyclohexanol through an acid-catalyzed dehydration. In order to produce the cyclohexene from cyclohexanol‚ an elimination reaction was performed. First by protonating the oxygen of the alcohol and creating an oxonium ion we replaced the poor leaving group (OH) into a better leaving group (OH2+). Second‚ dehydrating the cyclohexanol using phosphoric acid and sulfuric acid as acid catalysts
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Infrared Spectroscopy Organic Chemistry Lab 301A B. The purpose of this lab is to study Infrared Spectroscopy‚ which focuses on the study of the electromagnetic spectrum. The area to be studied is the infrared region‚ which is made up of gamma‚ X‚ and UV rays. We want to be able to identify spectra’s to their complementary structures. The background of this experiment particularly deals with the study of compound structure determination‚ and traits. We must be aware of the functional groups
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Synthesis of trans-9-(2-Phenylethenyl)anthracene Introduction The purpose of this experiment was to convert carboxyl compounds into alkenes. While this reaction yields both the E and Z isomers‚ it is preferred over other reactions due to the lack of uncertainty of where the double bond is positioned. Also the stability of an ylide determines which isomer is the major product. 1 Experimental: Compounds Benzyltriphenylphosphonium chloride 9-Anthraldehyde 50% Aqueous NaOH DCM Product Formula weight
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experimentally observed competing dihydroxylation reaction and the ligand-induced reaction rate acceleration. Introduction Sharpless et al. reported in the 1970s an aza-analogon of the osmium-catalyzed cis-vicinal dihydroxylation (DH)1 of alkenes‚ the aminohydroxylation (AH).2‚3 In 1996 it was rendered asymmetric4 and extended to a large variety of substrates in the following. The AH is synthetically important as it provides straightforward access to the aminoalcohol fragment present in
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in the presence of phosphoric acid. The alcohol was a mixture of cis and trans isomers‚ so it might have exhibited an Evelyn effect. It was also looked at if the products showed the Zaitsev’s rule‚ where in an elimination reaction‚ the most stable alkene was favored‚ which was usually the most substituted one and also the major product‚ which was the product with more % composition that was found out in the analysis. The % composition of the yield was found out by using the % composition of the products
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gauche-staggered chair boat The second type of stereoisomerism is geometric isomerism which is common in alkenes. Geometric isomers differ in physical properties such as melting points and boiling points. ex. cis (same side) trans (opposite side) For alkenes where cis-trans configuration does not apply‚ the geometry of the alkene may be designated by E (entgegen‚ opposite) or Z (zussamen‚ together). This is applied by determining
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of the main alkanes‚ alkenes‚ alkynes and cyclic hydrocarbons. Procedure: 1. Complete the following table with similarities and differences in hydrocarbons. 2. From the table set examples of compounds in their condensed formula‚ naming them correctly. 3. Search for information about an alkane. Indicate where it comes from‚ its uses‚ effects in the environment and the way we can avoid negative impacts of this compound. Results: 1. HYDROCARBONS Alkanes Alkenes Alkynes Cyclic H. Similarities
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