Chemistry 1027A/B Lecture Notes - Lecture 5: Diethylstilbestrol, Trans Fat, Isomer
13 Oct 2016
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Document Summary
Molecules can exit in many different shapes. The exact shape of a molecule, and the bond angles therein, depends on the atoms and the electronic structure. Names are based on the geometric shapes. Have the same molecular formula and sequence of bonded atoms (constitution), but differ in the three-dimensional orientations of their atoms in space. September 28th, 2016: dot line wedge symbolism. Line normal: single bonds freely rotate. Possible to have more than one dot-line-wedge structure that. Represents the same chemical species: double and triple bonds do not rotate. Stereoisomers have the same connectivity but are non-converting. This type of stereoisomerism in alkenes is called cis-trans isomerism: alkanes only single bonds, alkenes contains one or more double bonds, alkynes contains one or more triple bonds. Oleic acid cis isomer bonds on same side. Elaidic acid trans isomer bonds on the opposite side. One is formerly used as synthetic estrogen. Cis fat liquid good fat.
