Mind Map Minor

download Mind Map Minor

of 43

  • date post

    06-Apr-2018
  • Category

    Documents

  • view

    226
  • download

    0

Embed Size (px)

Transcript of Mind Map Minor

  • 8/3/2019 Mind Map Minor

    1/43

  • 8/3/2019 Mind Map Minor

    2/43

    intro

  • 8/3/2019 Mind Map Minor

    3/43

    Hi FRIENDS !! Today we will learnabout naming of alkenes and its

    physical properties..LETS BEGIN OUR JOURNEY!!

  • 8/3/2019 Mind Map Minor

    4/43

    intro

  • 8/3/2019 Mind Map Minor

    5/43

    Hi!!!!Do you all

    know me??

    I amPOLYSTREN

    E

  • 8/3/2019 Mind Map Minor

    6/43

    Iripeningthe fruit

  • 8/3/2019 Mind Map Minor

    7/43

    WE ARE FROM

    ALKENEGROUP

  • 8/3/2019 Mind Map Minor

    8/43

    Alkene is classified as unsaturatedhydrocarbon

    Contain at least one carbon carbon

    double bond General formula, C nH2n (n=1,2,3,.)

    For example, C 2H4 - ethylene

    About ALKENE

  • 8/3/2019 Mind Map Minor

    9/43

  • 8/3/2019 Mind Map Minor

    10/43

    WHAT is MY NAME???There are a lot of my name that you can identify.

    Interesting right? Well, lets see the steps that youshould use to give my name

    Step 1

    Step 2

    Step 3

    http://step%201-naming%20alkene.docx/http://step%202-naming%20alkene.docx/http://step%202-naming%20alkene.docx/http://step%203-naming%20alkenes.docx/http://step%203-naming%20alkenes.docx/http://step%202-naming%20alkene.docx/http://step%202-naming%20alkene.docx/http://step%201-naming%20alkene.docx/
  • 8/3/2019 Mind Map Minor

    11/43

  • 8/3/2019 Mind Map Minor

    12/43

    http://advanced%20level%20chemistry%20random%20%27type%20in%20name%27%20nomenclature%20quiz%20on%20alkenes.htm/
  • 8/3/2019 Mind Map Minor

    13/43

    Now, letslearn some

    alkeneproperties

  • 8/3/2019 Mind Map Minor

    14/43

    Compound alkene Physical stateC C Gases

    C - C Liquids

    C and above Solids

    a) Physical stateAt room temperature (25C)

    and atmospheric pressure

  • 8/3/2019 Mind Map Minor

    15/43

    SOLUBILITYInsoluble in water,

    But soluble innonpolar solvent

    due to the

    electron-attracting sp 2

    carbon.

  • 8/3/2019 Mind Map Minor

    16/43

    POLARITY

    Chemical structure andfunctional group can

    affect the polarity of alkenes compounds

    The sp C is moreelectron withdrawing

    than sp hybridzedorbital

    Thus, it creates aweak dipole along

    the substituentweak alkenly carbon

    bond

    Two individual dipolestogether form a net

    molecular dipole

    Trans the dipolecancel out

    cis - cannot cancel out. Thus,has net dipole and has higher

    boiling point than trans

  • 8/3/2019 Mind Map Minor

    17/43

  • 8/3/2019 Mind Map Minor

    18/43

    Boiling points of alkenesdepends on more

    molecular mass (chainlength).

    0o0oThe moreintermolecular mass isadded, the higher the

    boiling point.

    Hmm, giraffe Did you know why theboiling point increased

    with increasing molecularmass?

    Intermolecular forces of alkenes gets stronger withincrease in the size of the

    molecules.

  • 8/3/2019 Mind Map Minor

    19/43

    But, how about thealkenes that have same

    molecular mass but differin their structure?

    O0o0To predict relative boilingpoints, we should look fordifferences in (1) hydrogen

    bonding, (2) molecular weightand surface area and (3) dipole

    moments..

    For that compounds, weshould looks it surface

    area. the more branchedalkenes, the more lower

    its boiling points.

    One things we should considerin determine the boiling points

    of the compounds is itshydrogen bond. If it has

    hydrogen bond, then it has thehighest boiling points. Same

    goes with dipole moments.

  • 8/3/2019 Mind Map Minor

    20/43

    Compound Boiling points ( oC)Ethene -104

    Propene -47Trans-2-Butene 0.9Cis-2-butene 3.7Cis 1,2-dichlorobutene 152Trans 1,2-

    dichlorobutene

    155

    1-Pentene 30

  • 8/3/2019 Mind Map Minor

    21/43

    How about meltingpoint?

    1. Melting points of alkenesdepends on the packagingof the molecules.

    2. Alkenes have similarmelting points to that of alkanes,

    3. However, in cis isomersmolecules are package ina U-bending shape,therefore, will display alower melting points tothat of the trans isomers.

  • 8/3/2019 Mind Map Minor

    22/43

    Lets See Some

    ExampleCompound Melting Points ( 0C)Ethene -169

    Propene -185Butene -1381-Pentene -165

    Trans-2-Pentene -135

    Cis-2-Pentene -180

    1-Heptene -119

  • 8/3/2019 Mind Map Minor

    23/43

  • 8/3/2019 Mind Map Minor

    24/43

    Among of the followingsolvent, which solvent willmake alkenes dissolve?

    a) HClb) water

    c) CCl d) HSO

  • 8/3/2019 Mind Map Minor

    25/43

    1. What is the physical state of butene at room condition?

    2. Did 2,3-dimethylhexenedissolves in water? Why?3. Why the boiling points of

    octene is differ from butene?

  • 8/3/2019 Mind Map Minor

    26/43

    O0o0

    We are LOST!!!

    we need to do

    some activity to goaway from here..Can you

    help us??

  • 8/3/2019 Mind Map Minor

    27/43

    Do you want to continue??

  • 8/3/2019 Mind Map Minor

    28/43

    activity

  • 8/3/2019 Mind Map Minor

    29/43

    TRUE or FALSE??

    Somebody help meplease

  • 8/3/2019 Mind Map Minor

    30/43

    1. Alkenes do not have functional group

    2. Alkenes consist of carbon-carbondouble bond

    3. The general formula for alkene is

    CnH2n4. In naming the IUPAC name for

    alkenes,1 st step is list the number of substituents according to theirposition in carbon chain

    5. In alkenes, there is E-Z system

    F

    T

    T

    F

    T

  • 8/3/2019 Mind Map Minor

    31/43

    6.

    (E)-2-hydroxymethyl-2-butenoic acid

    7. Branched alkenes provided lower boilingpoint compared to straight chain alkenes8. Alkenes is polar molecule9. Alkenes soluble in water10. Alkenes provide higher polarity than

    alkanes11. Alkenes is less reactive than alkanes

    HC COOH

    C = CH CHOH f

    f f

    t

    f

    t

  • 8/3/2019 Mind Map Minor

    32/43

    activity

  • 8/3/2019 Mind Map Minor

    33/43

    CH2CH3

    CH2CH3

    Br

    1,4-hexadiene

    5-bromo-3-sec-butyl-1-pentene

    CH2

    CH3CH CHCH2CH CH2 4-bromo-1-ethylcyclo

    hexene

    CH3

    Br CH2CH2CHCHCH2CH3

    CH CH2

    2,3-dimethyl-2-butene

  • 8/3/2019 Mind Map Minor

    34/43

    CH2CH

    CH3

    CH3CHCH2

    HC = CH CH3

    CH3 CH2CHCH2CH = C CH2CH3

    CH3 CH3

    H

    CH3

    CH3

    CH3

    2-methyl-1,4-cyclohexadiene

    1,5-dimethylcyclopentene

    cis-5-methyl-2-hexene

    trans-5,7-dimethyl-3-nonene

  • 8/3/2019 Mind Map Minor

    35/43

    activity

    A h f i

  • 8/3/2019 Mind Map Minor

    36/43

    Arrange the correct steps of namingan alkene

    d) Name the parent hydrocarbon by locating the longest carbonchain that contains the double bond and name it according to thenumber of carbons with the suffix -ene.

    c) Number the carbons of the parent chain so the doublebond carbons have the lowest possible numbers.

    a) If the double bond is equidistant from each end, number so thefirst substituent has the lowest number

    b) Write out the full name, numbering the substituents according to their

    position in the chain and list them in alphabetical order.

  • 8/3/2019 Mind Map Minor

    37/43

    AnswerD, C, A, B

  • 8/3/2019 Mind Map Minor

    38/43

    Arrange the following alkenes withincreasing boiling points and explainwhy.

    2-methylpentene, 1-hexene,2,3-dimetylbutene

  • 8/3/2019 Mind Map Minor

    39/43

    ANSWER2,3-dimetylbutene < 2-methylpentene

    < 1-hexene

    To predict relative boiling points, we should look for differences

    in (1) hydrogen bonding, (2) molecular weight and surfacearea and (3) dipole moments.All of the compounds have same molecular mass and do not

    have hydrogen bonds. So, we look into its surface area.Because 2,3-dimetylbutene is most branched than others,thus it has the lowest boiling points.

    Between 2-methylpentene and 1-hexene, 1-hexene is notbranched, therefore it has the highest boiling point amongothers.

  • 8/3/2019 Mind Map Minor

    40/43

    WELL DONE SON.

    YOU DID IT !!NOW YOU CAN

    GO HOME..

    YEYY!!!THANK YOU OLD

    MAN..

    NOW WE CANMEET MY FAMILY

    AGAIN..THANKSFRIENDS

    FORHELPING

    US

    AT LAST,,WEUNDERSTAND ONHOW NAMING OFALKENE AND ITS

    PROPERTIES..

  • 8/3/2019 Mind Map Minor

    41/43

    Good bye friends!!!

    I hope you all understandbetter about naming of

    alkenes and its properties..

  • 8/3/2019 Mind Map Minor

    42/43

    REVISION Steps of naming an alkene Physical properties

    1. Appearances

    2. Density3. Solubility4. Polarity

    5. Boiling Point6. Melting Point

  • 8/3/2019 Mind Map Minor

    43/43