Bromine

Brett Reynolds Luiz Isidoro, Brian Covello April 11, 2012 Bromination of an Alkene Abstract This laboratory assay was knowing so that the solvent work in stereo limitedity in a decarboxylative excrement could be dogged. The experiment was divided in two parts, where the first touch the bromination of trans-cinnamic venereal disease into (RS,SR)-2,3-dibromo-3-phenylpropanoic acerb, the crossroad necessary for use as the substrate in the decarboxylation excretion reaction. The latter was our second stage, where the brominated collapse was reacted in a presumption solvent ( irrigate, in this case), bragging(a) a specific stereoisomer. This stereospecificity was determined by spectroscopy test results. It was found that water, when apply as a solvent in such elimination reaction, gives a trans fruit Background This was a two calendar hebdomad experiment. During week virtuoso, the bromination occurs in the, trans-cinnamic acid; our alkene. The electrons from the C=C repeat bewilder at the authoritative home to the carboxyl crowd attack the atomic number 35. This bromine attaches to the of mo nose candy creating a carbo-cation intermediate in the all-important(a) view. This carbo-cation intermediate allows for resonance perceptual constancy throughout the molecule. Once the compulsory charge is at the of import nose candy, it is because attacked by the debar bromine atom.

In week two, elimination of the bromine occurs and carbon dioxide is released. In the first step, water is used as a base to extract the bromine in the beta position of the carboxyl conclave creating a double bond to the important carbon. Water is then introduced and extracts a proton from the hydroxyl group, forming another C=O double bond. This then forms a good go away group from the bond between the carbonyl group and the alpha carbon. Carbon dioxide is tending(p) off, and the final product is assuage utilise the hydronium ion. The final product is produced, (E)-2-bromoethenyl-benzene. Experimental Design Week one started with trust 3.00 grams of trans-cinnamic acid...If you want to ascertain a full essay, state it on our website: Orderessay

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