Alkene

CHAPTER TWO RESULTS AND DISCUSSION 2.1 Synthesis of 1,3-butadienes Dienes can be synthesised from aldehydes and ketones using the Wittig reaction. The Wittig reaction facilitates the synthesis of new carbon-carbon double bonds at specific locations in aldehydes and ketones (Bernard & Ford, 1983). The overall reaction mechanism is shown in Figure 1. Protocols for synthesising 1,3-butadienes from aldehydes and ketones have been established in the literature. The synthesis protocol proposed by

In this lab, the goal is to explore the idea of elimination reactions and investigate ways to synthesizes alkynes. The product that will be produced is diphenylacetylene and this will be done by starting with meso-stilbene dibromide using elimination reactions. The balanced reaction is: For an E2 reaction to occur, strong bases should be utilized for this lab since E2 reactions favor well with strong bases. KOH is a strong base that is also acts as a strong nucleophile. This is because it contains

A 1,3,4-thiadiazole library was constructed by solid-phase organic synthesis. The key step of this solid-phase synthesis involves the preparation of polymer-bound 2-amido-5-amino-1,3,4-thiadiazole resin by the cyclization of thiosemicarbazide resin using p-TsCl as the desulfurative agent, followed by the functionalization of resin by alkylation, acylation, alkylation/acylation, and Suzuki coupling reaction. Both the alkylation and acylation reactions chemoselectively occurred at the 2-amide position

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

In this paper, the four Diels-Alder reactions observed in lab will be analyzed in terms of their mechanisms and experimental procedures. Through the Diels-Alder reaction, four different products were formed: dimethyl tetraphenyl phthalate, hexaphenylbenzene, tetraphenylnaphthalene, and triptycene. The general Diels-Alder rules and patterns were followed for each reaction, however, certain things such as solvents and experimental methods were changed in accordance to compounds in order to allow the

The Friedel-Crafts acylation reaction is an important and valuable electrophilic aromatic substitution reaction. First introduced in 1912 by Charles Friedel and James M. Crafts, this reaction allows large multi-step reactions to take place, and creates numerous types of products.1 Today, Friedel-Crafts reactions are among the most used electrophilic aromatic substitution reactions. In the electrophilic aromatic substitution class of reactions, functional groups are substituted onto an aromatic ring

of this experiment was to synthesize an alkene (4-methylcyclohexene) from an alcohol (4-methylcyclohexanol) by dehydration. The reaction, consist of 4-methylcyclohexanol, phosphoric acid, and sulfuric acid, was refluxed at a given time frame. The product was isolated by distillation and purified by adding sodium chloride to help the extraction. The final product had a 125% yield and was characterized by the IR spectroscopy and chemical reaction. The alkene resulted in a colorless liquid after adding

For this experiment, an addition mechanism for the bromination of an alkene was observed along with studying chirality. The bromination of the substituted alkenes was known as an oxidation reaction and it produced different stereoisomers based on the alkene’s geometry. The E-stilbene when exposed to bromine produced dibromostilbene. Three products can potentially form from this reaction which are meso, D, and L stilbene bromide. The goal of this experiment was to identify which stereoisomer predominated

Old Dominion University ORGANIC 214 Alkene Addition Submitted by: Alkene addition: Bromination of (E) Stilbene Introduction: In this lab we used the greener approach, which involves the addition of bromine across a double bond. When bromine reacts with E-stilbene (trans-1,2-diphenylethene), two new chiral carbons are created from the sp2 carbons, therefore 3 different dibrominated stereoisomers are possible: meso-(1R,2S), or the raceminc mixture-(1R,2R) or (1S,2S)-dibromo-1,2-diphenylethane

positive results for carbon-carbon double bond presence (cyclohexene). XI. Discussion/ Conclusion An alcohol can be dehydrated to form an alkene in the presence of a strong acid. We used 85% phosphoric acid and the alcohol is cyclohexanol. The reaction is carried out in a fractional distillation apparatus. As the alcohol and acid are heated, alkene and water are produced and distilled into a collection vial. The distillation process was long and we needed to be careful to not get any other