CHEM 1040 Lecture Notes - Lecture 31: Pi Bond, Chemical Formula

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CHEM 1040 - Lecture 31 - Isomers
*Note: This lecture was cut short due to a first aid emergency. I have spoken to Annie
already about the circumstances, so the note will be shorter than normal.
Constitutional Isomers
Compounds with the same molecular formula but different connectivity
atoms/groups are attached to different carbons, but they have the same molecular
formula
EX: 2- chlorobutane and 1- chlorobutane
Stereoisomers
atoms/groups are attached to the same carbon but the special arrangement makes
for different structures
More than one type of stereoisomer:
A.Geometric
Cis vs. trans isomers
Considers there are two sides to a molecule, and the sides may look different
Two sides are due to rigid portion created by a pi bond or ring structure
Each carbon involved in the C=C or ring must have different groups
EX:
B. Optical (Chiral) Compounds
Requires a molecule that;
Has 4 different  atoms/groups
Has no plane of symmetry
Has non-superimposable mirror images
(to be continued in next lecture)
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Document Summary

*note: this lecture was cut short due to a first aid emergency. i have spoken to annie already about the circumstances, so the note will be shorter than normal. Compounds with the same molecular formula but different connectivity. Atoms/groups are attached to different carbons, but they have the same molecular formula. Atoms/groups are attached to the same carbon but the special arrangement makes for different structures. Considers there are two sides to a molecule, and the sides may look different. Two sides are due to rigid portion created by a pi bond or ring structure.

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