Naming Alkenes Using E Z System - IUPAC Nomenclature

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  • เผยแพร่เมื่อ 2 ก.พ. 2025

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  • @TheOrganicChemistryTutor
    @TheOrganicChemistryTutor  2 ปีที่แล้ว +7

    Organic Chemistry - Video Lessons: www.video-tutor.net/organic-chemistry.html

  • @azeemshariff9786
    @azeemshariff9786 4 ปีที่แล้ว +351

    This dudes a legend. Here I am at 1am and this guy has taught me more than my month and a half in my org chem class.

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      @hayfordodartey1962 3 ปีที่แล้ว +3

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      @kariacampbell504 3 ปีที่แล้ว

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    • @nb6955
      @nb6955 3 ปีที่แล้ว +17

      The way I’m using to remember E and Z is that in E, the priority groups go “Eww” and stay away from each other.

    • @AH1-234
      @AH1-234 ปีที่แล้ว

      @@nb6955 THIS IS GENIUS THANK YOU SO MUCH

    • @mong7192
      @mong7192 ปีที่แล้ว

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    @alixkirkendol1018 3 ปีที่แล้ว +37

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  • @blueberry_borb
    @blueberry_borb ปีที่แล้ว +35

    Holy crap this video might have just saved my life. I have an organic chemistry exam in less than 4 hours, and this dude just explained a concept I've failed to grasp all quarter. Very grateful

  • @mammawhat5026
    @mammawhat5026 3 ปีที่แล้ว +9

    Came to you because professors have proven to be useless, once again.
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  • @homemadeverythinghomeworkoutz
    @homemadeverythinghomeworkoutz 7 หลายเดือนก่อน +3

    i guess we all agree this man is the king of chemistry

  • @1isbetter
    @1isbetter ปีที่แล้ว +3

    THESE ARE THE PEOPLE ON TH-cam WHO DESERVE TO MAKE BIG MONEY! I AM TRYING TO GET INTO MEDICAL SCHOOL AND YOU'RE AMAZING AT TEACHING ORGANIC CHEM! Yes the capital letters were me yelling this XD.

    • @Daphinemwanza-dr9ls
      @Daphinemwanza-dr9ls 8 หลายเดือนก่อน

      😂😂😂😂 perfectly said 😊

  • @daiwikdhar6464
    @daiwikdhar6464 4 ปีที่แล้ว +231

    8:00 - If ur in a rush

    • @Aya-wv3rt
      @Aya-wv3rt 4 ปีที่แล้ว +4

      Thank you!

    • @ziolan8970
      @ziolan8970 4 ปีที่แล้ว +3

      You are awesome

    • @emmajohnson964
      @emmajohnson964 4 ปีที่แล้ว +15

      THANK YOU from somebody who's orgo final is in 15 minutes lmao

    • @brandonopara7778
      @brandonopara7778 4 ปีที่แล้ว

      @@emmajohnson964 how did it go

    • @darshmehta3155
      @darshmehta3155 4 ปีที่แล้ว

      @@emmajohnson964 ????

  • @loneranger2858
    @loneranger2858 ปีที่แล้ว +3

    I am a UNIBEN undergraduate and this your lecture video on isomers is simply top notch far better than textbooks

  • @AnimeUni-versed
    @AnimeUni-versed 5 ปีที่แล้ว +225

    My chem prof made a mnemonic to remember the Z isomer.
    It's Z because the two groups with the highest priorities are on the "Zame Zide" (Same side).
    Obviously, for the E isomer it would be different sides then.

    • @vedantpatel8266
      @vedantpatel8266 5 ปีที่แล้ว +15

      i think of it as acrosZ and oppositE.

    • @gregorymoore7617
      @gregorymoore7617 5 ปีที่แล้ว +7

      My teacher said think of E like “ears” which are on “opposite” sides of your head.

    • @jamesburmeister1608
      @jamesburmeister1608 5 ปีที่แล้ว +1

      This helps, thanks

    • @ashutoshkudva9269
      @ashutoshkudva9269 4 ปีที่แล้ว +3

      this was super helpful, thanks

    • @trimikeycool
      @trimikeycool 4 ปีที่แล้ว +1

      i always try to think it as "like Zis"

  • @staycalm9979
    @staycalm9979 ปีที่แล้ว +25

    If you want to jump right into E-Z system, then it starts at 8:10

  • @grimoireprime
    @grimoireprime 10 หลายเดือนก่อน

    This guy is the best, Loads better than any lecture professor

  • @storyhub-i5p
    @storyhub-i5p 2 ปีที่แล้ว +2

    You deserve a 5star.
    I really like your tuitions because it has helped me from Jhs, and SHS as well.
    Thank you and God bless you too.

  • @FavourAlatishe
    @FavourAlatishe 4 หลายเดือนก่อน

    I learnt a lot and understand what i have been finding so hard to get. I really like watching organic chemistry videos from this channel because it's always understandable

  • @devyndevyndevyn
    @devyndevyndevyn 11 หลายเดือนก่อน

    ive been trying to figure this out for months. i needed only 11 minutes of time... incredible.

  • @jangy36
    @jangy36 4 หลายเดือนก่อน +1

    thank you for this video my teacher sucks at teaching. she would just write the name straight away while you labeled the branches and parent chain first and then combined it. made it very clear

  • @Bdjfvdl
    @Bdjfvdl 6 หลายเดือนก่อน

    I listen to your explanation bc of your voice its very calming

  • @shahirazri
    @shahirazri 4 ปีที่แล้ว +3

    you literally saved my life 😭 thank youu soo much !!!! 🥺😭

  • @watevaa1234567
    @watevaa1234567 2 ปีที่แล้ว +12

    E and Z come from the german words "Entgegengesetz" (Opposite) and "Zusammen" (Together)

  • @drf.j8276
    @drf.j8276 2 ปีที่แล้ว +1

    Wow chem is more easier. This dude is a genius. We need such chem teachers

  • @theunusedbrain3291
    @theunusedbrain3291 ปีที่แล้ว +3

    In the last question the correct name of the compound is - (Z) 3-methyl-2-propyl hex-2-ene (by giving the double bond lowest numbering). The parent chain will contain 6-carbon not 8.

  • @8drv8dragon50
    @8drv8dragon50 ปีที่แล้ว

    I am Iraqi stady in HUST in china. You the best lecturer 👌🙏

  • @mysteryunwrapped6787
    @mysteryunwrapped6787 ปีที่แล้ว

    the fact that his voice is also soothing

  • @МирасКарасай
    @МирасКарасай 3 ปีที่แล้ว

    Man, you are just a pure legend!

  • @pshtiwanqadr7984
    @pshtiwanqadr7984 2 ปีที่แล้ว

    Tomorrow I have test in organic chemistry about this topic.
    Thank you for everything...

  • @erumwazir954
    @erumwazir954 2 ปีที่แล้ว

    Thanks sir.... Huge respect from Pakistan 😍

  • @wurbo3488
    @wurbo3488 3 ปีที่แล้ว

    you're a genius bro ily

  • @kellyn_
    @kellyn_ 2 ปีที่แล้ว +7

    but for the last example tho I thought we have to prioritise and make double bonds the lowest position possible? so isn't it suppose to be (Z) 1,2-dimethyl-1-propyl-1-pentene

    • @avamaykienbaum2065
      @avamaykienbaum2065 11 หลายเดือนก่อน +1

      @theorganicchemistrytutor help!!

  • @malikdwaik6943
    @malikdwaik6943 ปีที่แล้ว +3

    At 10:42 isn’t wrong to count from the ethyl group because if you start from the methyl group the double bond would be number 2 ??

    • @tapinwardly
      @tapinwardly 8 หลายเดือนก่อน

      dude that's what I am thinking! Sucks my final is tomorrow morning and nobody is gonna read this.

    • @aliatar9325
      @aliatar9325 4 หลายเดือนก่อน

      Isn't it because it will be the longer chain. If you go by the methyl group the chain will be shorter.

  • @jasielamaya5889
    @jasielamaya5889 ปีที่แล้ว +2

    I get that everyone is saying "this saved me" I get that its a good explanation. I am still confused though oh my goddddd

  • @ninjanerdstudent6937
    @ninjanerdstudent6937 5 ปีที่แล้ว +37

    Zame and Eppisites.

  • @matamrojarani9638
    @matamrojarani9638 5 ปีที่แล้ว +3

    Explanation is good.... thank you so much........

  • @secondhatchery
    @secondhatchery 3 หลายเดือนก่อน

    great video as usual. how do you know which group have priority though ?

  • @bryangonzales00
    @bryangonzales00 9 หลายเดือนก่อน +2

    Thanks for making this lesson SO EZ
    Hehehehe

  • @DrTuph
    @DrTuph ปีที่แล้ว +1

    9:41 I got (Z)-2-bromo-1-chloro-1-propene for the left and (E)-2-methyl-1-buten-1-ol for the right.

  • @mallorieblair
    @mallorieblair 6 ปีที่แล้ว +6

    How do you tell the difference between cis and trans-2-butene in the skeletal structures (at 1:20 into the video) ?

    • @mariekegraf9087
      @mariekegraf9087 5 ปีที่แล้ว +6

      For anyone else who has the same question. It´s easier to see whether the molecule is trans or cis when you draw the hydrogen to the second and third carbon. If the hydrogens are both upwards it´s cis-2-butene, if one hydrogen is up and the other hydrogen is downwards, it's trans-2-butene.

    • @PukasKazinau
      @PukasKazinau 2 หลายเดือนก่อน

      @@mariekegraf9087Thanks, but how do we know if the hydrogen is upwards or downwards?

  • @sciencesynergy-g4h
    @sciencesynergy-g4h ปีที่แล้ว

    Thank you very much🙏🙏🙏...we appreciate

  • @isaackibet1667
    @isaackibet1667 3 ปีที่แล้ว

    Very helpful discussion 🙏🙏🙏

  • @cabralesmj5
    @cabralesmj5 3 ปีที่แล้ว +2

    6:14 Could it also be 2-ethylcyclohexene? You could start counting at the carbon above and achieve a smaller number for the ethyl group.

    • @timisanniofficial
      @timisanniofficial 3 ปีที่แล้ว +5

      No, it can't bro. For carbon 1 to take the double bond it has to be between C1 and C2. Putting it between C6 and C1 will be giving the double bond to C6 even though C1 is the lower number.

    • @cabralesmj5
      @cabralesmj5 3 ปีที่แล้ว

      @@timisanniofficial Thank you. :)

  • @SuperioMan3432
    @SuperioMan3432 4 ปีที่แล้ว

    GRACIAS. YOU ARE TRUE KING

  • @phillipinek1856
    @phillipinek1856 5 ปีที่แล้ว +3

    Thank you, this was helpful

  • @kwesistarks2544
    @kwesistarks2544 2 ปีที่แล้ว

    He's the best✨

  • @Vohotwikx_Te_Axii_Ayroite
    @Vohotwikx_Te_Axii_Ayroite 3 ปีที่แล้ว +1

    You're the only reason I'm passing my guy

  • @binodlakmal4030
    @binodlakmal4030 2 ปีที่แล้ว +1

    From 8:10 nomenclature of E/Z Isomers

  • @CarlosADasilva
    @CarlosADasilva 3 ปีที่แล้ว

    God bless my friend, well explained as always

  • @Greatezenduka
    @Greatezenduka 5 หลายเดือนก่อน

    Thank you so much sir ur just d best

  • @linfordekowassan9136
    @linfordekowassan9136 3 ปีที่แล้ว

    Living legend 🙌

  • @sugabear9511
    @sugabear9511 5 ปีที่แล้ว +1

    U made my day😊

  • @hortensekasangula7009
    @hortensekasangula7009 2 ปีที่แล้ว

    I love the video it has helped

  • @atakankara6882
    @atakankara6882 5 ปีที่แล้ว +3

    For cis it's Z (zusammen -together ) both z and t are consonant, and for trans it's E (entgegen-opposite) both e and o are sonant/vowel you can remember from here. thank me later :)

    • @jasbharaj
      @jasbharaj 2 ปีที่แล้ว

      it is even difficult than the actual E Z isomers concept lol

  • @Junior4466
    @Junior4466 5 ปีที่แล้ว +25

    Skip to 8 minutes for the actually video

  • @joyjohonroy3579
    @joyjohonroy3579 4 ปีที่แล้ว +1

    11:50 Can we call it Sis - 4,5 - dimethyle - 4 - octene ??

  • @malikakaderali4101
    @malikakaderali4101 6 ปีที่แล้ว +4

    Is this according to the newest IUPAC rules released? In class, we learned if there are no rings: the longest chain has priority regardless of the presence of multiple bonds, which is different from the older IUPAC rules. Do you think you can clarify? Overall-helpful with distinguishing E and Z isomer. Thank you!

    • @rachierachvlogs
      @rachierachvlogs 5 ปีที่แล้ว +7

      These aren't the newest iupac rules. U can tell because he names 2-butene instead of but-2-ene

    • @Elorm
      @Elorm ปีที่แล้ว

      The bonds are counted before the substituents

  • @nicksonngetich2581
    @nicksonngetich2581 3 ปีที่แล้ว +1

    Thanks so much ,

  • @Sk3tAtlas
    @Sk3tAtlas 3 หลายเดือนก่อน

    At 11:50 could it be cis-4,5-dimethyl-4-octene instead of Z

  • @DivineIkalaso
    @DivineIkalaso 4 หลายเดือนก่อน

    God bless you Sir

  • @nahara2122
    @nahara2122 2 ปีที่แล้ว +2

    Can someone explain why he does not use the E Z system on cycloalkenes? (like why doesn't he indicate whether it has an E or Z configuration on its nomenclature)

  • @fatemehgharehbaghi5198
    @fatemehgharehbaghi5198 2 ปีที่แล้ว

    Wow that's amazing

  • @bobbert24
    @bobbert24 4 ปีที่แล้ว +2

    For the very last question, do you need to use the E,Z system? They aren't different groups so cant you just use cis-trans?

    • @woodchuk1
      @woodchuk1 4 ปีที่แล้ว

      No, because the alkene is tetrasubstituted...there’s no way to tell what groups are cis or trans to the others. The two methyl groups are cis to each other, for example, but each of them is trans to the propyl groups, so which do you pick? So it has to be (Z)-4,5-dimethyl-4-octene. For trisubstituted and tetrasubstituted alkenes, the EZ system is required for unambiguity.

  • @Shubham.4xx
    @Shubham.4xx 11 หลายเดือนก่อน

    Thank You So much !

  • @lieviotangellos7343
    @lieviotangellos7343 หลายเดือนก่อน

    0:31 Why is it required you say "1-" for butene but not "1-" for propene, is 1 not already implied for both?

    • @paysonkeown2960
      @paysonkeown2960 24 วันที่ผ่านมา

      We can have 2-butene, so from a formal perspective, 1-butene does not have an implied 1-.

    • @lieviotangellos7343
      @lieviotangellos7343 24 วันที่ผ่านมา +1

      @@paysonkeown2960 oh I see, and for propane it can only be 1 or 2 but it would be implied to be 1. but for butene, it can be in the middle (2-) instead of the terminal ends, so that is why it's necessary to state 1-

    • @paysonkeown2960
      @paysonkeown2960 24 วันที่ผ่านมา +1

      @@lieviotangellos7343 yeah exactly. Some labs and scientists would be fine if you said butene, but if you were in a class, writing to someone who likes 1-, or writing something important down, 1- is needed.

  • @SBchicadebaile
    @SBchicadebaile 5 ปีที่แล้ว +1

    why did you start counting from the left instead the right at time 2:01 ?

    • @pavanbhat3861
      @pavanbhat3861 5 ปีที่แล้ว

      Its the same from either way.

  • @dianachamoun996
    @dianachamoun996 2 ปีที่แล้ว +1

    What if the two highest priority groups are both on the left side of the compound?

  • @samuelralton8637
    @samuelralton8637 3 ปีที่แล้ว +1

    I need to see the face of this man!!!

  • @Ttn302
    @Ttn302 5 ปีที่แล้ว +4

    11:48 can it be "(Z)-4,5-dimethyloct-4-ene?

    • @bellaccino129
      @bellaccino129 5 ปีที่แล้ว +1

      Yes!

    • @karinalalwani4730
      @karinalalwani4730 5 ปีที่แล้ว

      yes!

    • @woodchuk1
      @woodchuk1 4 ปีที่แล้ว

      Yes, that’s also considered correct, but saying it that way has always grated on my nerves a bit. I generally tend to say names likes that with the number entirely before the parent chain.

  • @kevinhunda
    @kevinhunda ปีที่แล้ว

    a genteel men i can't till end of my life

  • @shameizahussain2818
    @shameizahussain2818 4 ปีที่แล้ว +2

    does the orientation of the pi bond change when switching between e and z configuration?

  • @BL-uf8vb
    @BL-uf8vb 3 ปีที่แล้ว

    @ 10:46, where does the second 3 come from? I understand the (E) - methyl and heptene part but why is there a 3 in front of heptene?

    • @user-lk1cl6ev7g
      @user-lk1cl6ev7g 3 ปีที่แล้ว +1

      the double bond is on carbon 3, sorry if this is late

    • @BL-uf8vb
      @BL-uf8vb 3 ปีที่แล้ว +1

      @@user-lk1cl6ev7g no worries it refreshed my memory as I thought I figured it out but looking at it again I got confused but now I get it. Thank you!

  • @soloholder2739
    @soloholder2739 5 ปีที่แล้ว

    At 7:56 why isn't it 1-ethyl-5-methyl-cycloheptene? I started counting the same direction as he did in the beginning, but when on to count the ethyl with a 5,6, and 7. @TheOrganicChemistryTutor or anyone else. Thank you.

    • @rxxxanxx4828
      @rxxxanxx4828 5 ปีที่แล้ว

      First, u need to consider where is the double bond. Then, u put the number on that ring. So we can see we have methyl and ethyl right? The reason why u write ethyl first then methyl because "e" come out first before"m"

  • @terra.nycole
    @terra.nycole ปีที่แล้ว

    Thank you

  • @mahmoudaljasm266
    @mahmoudaljasm266 5 ปีที่แล้ว +1

    Very good

  • @PaubiSalin
    @PaubiSalin ปีที่แล้ว

    Thank you dai

  • @amernasrawy339
    @amernasrawy339 8 หลายเดือนก่อน

    You saved me man

  • @bananabaddie
    @bananabaddie 4 ปีที่แล้ว

    Thank you

  • @mohubeduabram3896
    @mohubeduabram3896 6 ปีที่แล้ว +20

    i love loving you.

  • @israelbattle5997
    @israelbattle5997 ปีที่แล้ว

    I have a question about dienes? How do we do e and z when there are multiple double bonds

  • @tokki_II
    @tokki_II 3 ปีที่แล้ว

    are the En'Z and CISn'TRANS both similar?
    cause in you know the other channels or video are using CIS and TRANS just trying to ask if they're the same

    • @jamesinman9262
      @jamesinman9262 3 ปีที่แล้ว

      The E/Z system is an absolute form of naming, which can always be applied for clarity. Cis/Trans only works in simple cases, and only tells the relative configuration.

  • @conchadeconchos
    @conchadeconchos ปีที่แล้ว

    7:00 isn’t there not a 1-cyclohexene at the end for double bond

    • @paysonkeown2960
      @paysonkeown2960 10 หลายเดือนก่อน +1

      Adding the 1- isn’t necessary as it is known the alkene occurs at position 1

  • @piechart5378
    @piechart5378 2 ปีที่แล้ว +1

    In this structure
    2,5-dimethyl-3-propyl-hexene
    I have been struggling to find out what the longest chain is. I wonder if there is any scenario where the parent chain is not like longest chain in the alkene above. Any one to help

    • @theunusedbrain3291
      @theunusedbrain3291 ปีที่แล้ว

      You have chosen it right because according to the IUPAC rules - 1) The longest C-chain must contain double bond. 2) Longest C-chain must get maximum number of branches(try to get multiple number of branches rather than getting one complex branch or substituent). So, 2,5-dimethyl-3-propyl-hexene is the correct IUPAC name and 2-methyl-3-(2-methyl propyl)hexene is the incorrect one.

  • @mercykomzy
    @mercykomzy 9 หลายเดือนก่อน +1

    Can someone assist me with the structure of (E)-1-Bromo-2-isopropyl-1,3- butadiene. Check if it must be E and not Z

  • @Drew.407
    @Drew.407 3 ปีที่แล้ว

    doesnt the 4-methyl-1-hexene have a chiral center?

  • @marwa90628
    @marwa90628 4 ปีที่แล้ว +9

    i think my brain just comit suicide

  • @patriotas05
    @patriotas05 19 วันที่ผ่านมา

    I mean this video was made 6 years ago, but I don't understand WHAT IF we had a simple ethene with 2 different functional groups on the left side and 2 hydrogen atoms on the right - would it be E isomer, or is this the case of "this molecule has no isomers". Its hard for me to put my question in words - if I could post a drawing it would be easier.

    • @paysonkeown2960
      @paysonkeown2960 16 วันที่ผ่านมา

      So like maybe 1,1-dichloroethene? With molecules like that, there won’t be an E/Z designation since E/Z applies to groups on opposite sides.

  • @Touched-v6p
    @Touched-v6p 2 ปีที่แล้ว +2

    Took me 2 hours to decipher a 12 minute video

  • @baeyuh
    @baeyuh ปีที่แล้ว

    ty

  • @ryanp8518
    @ryanp8518 5 ปีที่แล้ว

    What is the second 3 and second 4 in the 2nd to last and last problem? Why is it z 4,5 dimethyl FOUR octene???? I don't understand the 2nd 4

    • @woodchuk1
      @woodchuk1 4 ปีที่แล้ว

      The 4 in 4-octene indicates which carbon of the main chain that the double bond starts on.

  • @giovannifalcone8040
    @giovannifalcone8040 5 ปีที่แล้ว +1

    can we use E-Z for cycloalkenes?

    • @aeropostale101nw
      @aeropostale101nw 4 ปีที่แล้ว

      I don't think it applies for cycloalkenes. R and S do though

    • @giovannifalcone8040
      @giovannifalcone8040 4 ปีที่แล้ว

      @@aeropostale101nw thank you !

  • @AdriLaTower
    @AdriLaTower 5 ปีที่แล้ว

    In 6:16, why ethyl and not methyl?

    • @sheilamae7279
      @sheilamae7279 5 ปีที่แล้ว +1

      There is an invisible bond between CH2 and CH3

  • @BlazeTony
    @BlazeTony 3 หลายเดือนก่อน

    👌👌👌👌

  • @Danahisbusynow
    @Danahisbusynow 4 ปีที่แล้ว

    THannkkk youuuuuuu

  • @muhju9610
    @muhju9610 5 ปีที่แล้ว +1

    I love you

  • @橙子-p5r
    @橙子-p5r 4 ปีที่แล้ว

    How do you know where to start counting?

    • @bigbang8012
      @bigbang8012 4 ปีที่แล้ว

      You prioritize the alkene (double bond) so u start with it

    • @levikaneki5778
      @levikaneki5778 4 ปีที่แล้ว

      Very useful to him after 6 months

    • @Dina-he1uc
      @Dina-he1uc 4 ปีที่แล้ว

      @@levikaneki5778 lol

  • @TimeManInJail
    @TimeManInJail ปีที่แล้ว +2

    It so easy yet u freeze up during test...

  • @thilangimunasinghe1686
    @thilangimunasinghe1686 ปีที่แล้ว

    ❤️

  • @zaidabuarja9249
    @zaidabuarja9249 3 ปีที่แล้ว

    after tm my unite 1 chem exam wish me luck please

  • @Youtuberohyeah
    @Youtuberohyeah 3 หลายเดือนก่อน +1

    come to my school and be my professor please

  • @Sai1ence
    @Sai1ence 4 ปีที่แล้ว +2

    It sure is E Z to learn!

  • @winkamal28
    @winkamal28 10 หลายเดือนก่อน

    This voies🥲

  • @Siiiiuuuuuu-gu4rv
    @Siiiiuuuuuu-gu4rv ปีที่แล้ว

    6:42

  • @theharv1490
    @theharv1490 3 วันที่ผ่านมา

    TIP: For Z configuration, think of the word same but say it as "zame" instead of "same".