Ch 2 notes Pt. 2
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Four regions of electron density =
four hybrid orbitals
How many shapes are there in organic chem?
What is an sp3?
an orbital that has a saturated center
SP2 in terms of four bonds?
has three sigma bonds and the p orbital will be a pi bond
Explain charges with pi bonds.
- + with +
- - with -
- they have to be parallel and in phase
- weaker and more exposed
The pi bond is __ to the plane of the molecule.
Every carbon carbon bond has only one __.
stereoisomers (geometric isomers)
- compounds don't rotate
- configuration around double bonds determines the compound
Those isomers that have different connectivities are __.
structural isomers (constitutional)
- London Dispersion forces
- hydrogen bond
- dipole dipole
A greater surface area will result in __
a higher melting point
Explain BP in terms of constiutional isomers.
the least branched isomer will have hte greatest boiling poin because they can stack the together
the most branched has the lowest boiling point
Bonding takes place in __.
Lone pairs are very strongly __.
More polar bonds are __.
they are more polar because the direction of NH3 does not cancel out as much as NCl3
London Dispersion forces
- very weak
- temporary dipoles
- more increased SA, the better chance at keeping together
- affects solubility and properties
- strongest of intermolecular forcesmust contain NH or OH
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