CHM1022 Chapter Notes - Chapter 1: Trigonal Planar Molecular Geometry, Sigma Bond, Intermolecular Force
17 Oct 2018
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Isomers identical molecular formula but different structure. The hydrogen from hbr will bond with the alkene carbon with the larger number of hydrogens: carbocation stability: Alkene carbon that has the most hydrogens is more stable: at a fundamental level, the more charge can be spread out, the more stable the cation is. Inductive effect: a positively charged atom attracts electrons from adjacent sigma-bonds the charge is spread between these atoms. The more sigma-bonds, the more stabilized the carbocation is: resonance effect: if the adjacent atoms has a pi-bond, then electrons can be redistributed to spread the positive charge. The 2 in between (and the arrow) show that it is the average structure of them (not equilibrium) Draw 1-bromo-2-chlorocyclohexane as a chair form (show all hydrogens) trans - (as cl & br are in different sides of the plane) The way putting h, is try to create a tetrahedral shape of each c trans cis x2: same molecules but different conformers.
