Halogenated or most commonly known as fabrication is a action that breaks a pi bond and adds a halogen or in this case, a bromine to the molecule. This addition of the bromine can be very associatively. Stereotypically can come from sterile and electronic effects. Sterile effect arise when two atoms AR brought close together, the resulting push of electron clouds is what creates the significant change in shape. The sterile and electronic chemistry affect the way the halogen react with the molecule.
E-Stillest is a hydrocarbon with a double bond and with phenyl groups attached to each side of the double bond in a such way that the configuration is in the trans formation. Stillest has two isomers, trans stillest, and CICS stillest, which is more unstable than trans stillest. Z-stillest has a melting point of 5-6 degrees C and E- stillest has a melting point of 125 degrees C. The fabrication of E-stillest theoretically results in an all mess product. The mechanism suggests that when the bromine is attacked by the pi bond, it will add ton of the carbons.
The other bromine adds to the other carbon but on the opposite side so that only the mess compound is made. During the reaction the bridged holmium intermediate is very important in concussing the results in the actual experiment. Although the mess compound dominated because it is the most stable, the d/l compounds of stillest are also produced but in very low amounts. These two compounds are distempers of one another and have different physical properties such as melting points .
The melting point of mess stillest is 248 degrees C and the d/l steeliness have melting points that are less than 100 degrees C. Data and Analysis After fabrication of . Egg of E-stillest, the crude amount recovered was 1. 205 g and the melting point of the crude substance was 160. Considering the melting point of the mess is 241, this data is a Littleton. This might be due to the crude amount not totally being mess. Since we actually get a mixture of mess and d/l products, it is not a surprise to find that the Pm is lower than expected.
The crude amount was then put through rationalization process, and the recovered amount was . Egg and the melting point was found to be 155 degree C. This is also not a the data we are looking for. The melting point should be a combination of two melting points for the mess product and the d/l product. So the melting point we want should be around 180 degree C. The fact that its lower could be that all the contaminants have not been removed from the recover amount and that was hindering the accuracy of the data.
Also maybe the reaction did not finish producing all the mess compounds so that led to a significant decrease in melting point. The % yield of the product was 82. 78%. Some sources of error could that after stirring for 15 minis some of the solids was left in the round bottom flask and there was no way to get all of it out. Also another source of error could be when removing the stir bar, some of the reduce stuck onto the stir bar and there was a loss of product from there.
As well as when rationalizing, some of the solid was left on the beaker, when it was being transferred to a weighing boat for a final weighing. Conclusion Purpose of the experiment was to add bromine to e-stillest to get z-stillest. Although the theoretical data states that all of the product should be mess, the actual experiment says otherwise and we get a mixture of mess, and d/l products. Although most of the product is mess, the intermediate was stereotypical enough to produce d/l products too.