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Class notes

chapter 2 class notea

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Notes from class on organic chemistry chapter 2

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  • October 14, 2024
  • 3
  • 2023/2024
  • Class notes
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HAPTERZ ALKANESANDCYCLOALKANES MISSEDNOTESFROMCLASS WEDNESDAYSEPTEMBER13th

configma
Hydrocarbons pibonds ALKANES
aturated
Alkanes Alkenes g
unsaturated
t t
EXAMPLE
stl
Alkynes Arenes Ctl
one'ormore d
one more

I THE
on or oneormore

b onds
double bonds
triple CH STRUCTURALIsomers

2.1 STRUCTUREOFALKANES

2.2 CONSTITUTIONALISOMERISM
different
compounds
withthesame
isomersmolecular
INALKANES
y CH
formula 1
CH C CH
I
IIIIIIent
constitutionalisomers
fferentcompoundswiththesame different
compounds
molecular the
with
formula CH
olecularfrmulabutadifferent same same
conn
m
connectivity



thesamemolecularformulabutadifferentconnectivity
DEFINITIONCompoundswith
Differinphysicaland
chemical atom
their
properties Aredifferentcompounds
3NOMENCLATUREOFALKANESANDTHEIUPACSYSTEM Differin andchemicalproperties
p hysical

RULESOFTHEIUPACSYSTEMFORNAMINGALKANES
Infix of
Nature carboncarbon bondsintheparentchain

an
International
Union ofPureandAppliedChemistry
en oneor moredoublebonds MEMORIZEmolecule Iname
yn triplebonds
oneormore prefix root ofc ENDclassofmolecule
E saturated Alkanes
hydrocarbon
Suffix class ofcompound
e hydrocarbon

ng
al aldehyde

amine amine 1 Followingthelongestchain
ketone root C ENDclassofmolecule
one prefix
oicacid acid
carboxylic MEMORIZE
Chainchartuntildodecane

ALLalkylgroups
CONFORMATIONS

DEFINITIONThe of molecule tohavegreaterenerg
closelypacked
groupshape more is
of
because electron
repulsion

Themorepackeditis thebetterbecauseelectronswillnotfloataway
Ifaconformeris crowded
very
molecule higherpotentialenergylgasphase
packed
Closely

THEINTERACTIVEWEBSITETOSTUDYTHEMOLECULE
GOTO
SHAPESANDCONNECTIVITY
Conformationsintramolecular


from
Results rotationsabout
singlebond
a
Nota of1molecule
transitionbutareitemtion
phase

Atroomtemperatureenoughenergyisprovidedsothatthestructor
isnolongerrigidbutisflexibleandcanberotated
When is
c ompulsion minimized
c ompactedelectron

electrondensity
is highlstatichinderance potential

energyis
high
Differentconformations often
called ISOMERSorconform
CONFORMATIONAL
are

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