Considering both stereochemistry and regiochemistry, which of the following methods is the best way to make the compound shown? Br CH3 H3C Br neither method is effective Li, NH3 Br HC-CEC-CH, both methods are effective H/Lindlar catalyst Br, H;C-CEC-CH2
Electronic Effects
The effect of electrons that are located in the chemical bonds within the atoms of the molecule is termed an electronic effect. The electronic effect is also explained as the effect through which the reactivity of the compound in one portion is controlled by the electron repulsion or attraction producing in another portion of the molecule.
Drawing Resonance Forms
In organic chemistry, resonance may be a mental exercise that illustrates the delocalization of electrons inside molecules within the valence bond theory of octet bonding. It entails creating several Lewis structures that, when combined, reflect the molecule's entire electronic structure. One Lewis diagram cannot explain the bonding (lone pair, double bond, octet) elaborately. A hybrid describes a combination of possible resonance structures that represents the entire delocalization of electrons within the molecule.
Using Molecular Structure To Predict Equilibrium
Equilibrium does not always imply an equal presence of reactants and products. This signifies that the reaction reaches a point when reactant and product quantities remain constant as the rate of forward and backward reaction is the same. Molecular structures of various compounds can help in predicting equilibrium.
i need help figuring this out. I think it might be b but I'm not sure
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Explanation :
Since given reactant is trans addition of bromine on alkene .
Initially we have Li/NH3 so it can reduce alkyne to alkene and that too trans alkene .
And also in given reactant it must be trans alkene then after addition of Br2 anti addition of Br2 would have been taken place at alkene .
But in case of H2/ lindlar catalyst ,alkyne will convert into cis alkene and after then addition of Br2 will take place .
But according to given product alkene should be trans .
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