Home   Forum   Help Search Calendar Links Login Register   **
Welcome, Guest. Please login or register.
Did you miss your activation email?
May 25, 2012, 08:16:39 AM

Login with username, password and session length
Program
EduWebTVLatih TubiLINUSManaging Challenging SchoolsGerakan Memperkasakan SekolahLDPICTL SMICTL SRMalaysian Grid for Learning (MyGfL)ProtimPPSMISIP
Recent
Peperiksaan Pertengahan T...
by Cheong Wooi Chun
[Today at 07:56:42 AM]
introduce myself
by ruslizasalleh
[Yesterday at 11:56:50 PM]
URUSAN PEMANGKUAN PEGAWAI...
by Irin ak Banying
[Yesterday at 10:23:08 PM]
Selamat Bertugas di Pejab...
by Sia Soh Hoong
[Yesterday at 09:45:39 PM]
WARAN..WARAN..WARAN
by Dharma Harun
[Yesterday at 08:34:38 PM]
TIME BASED
by Goh Yong Juan
[Yesterday at 05:51:30 PM]
PSKPP peringkat Negeri Sa...
by Robert Anak Adam
[Yesterday at 11:53:44 AM]
Some tips for answering E...
by Mary Jane Telma Teo
[Yesterday at 09:14:15 AM]
jadual gaji ssm baru utk ...
by Zulkifle B. Abdullah
[May 23, 2012, 09:30:31 PM]
Danny Arthur (SMK DPM, Pe...
by Arthur
[May 23, 2012, 08:37:00 PM]
 

engkabang.net > Forum > Sijil Pelajaran Malaysia > 4541 Chemistry (Moderator: Jong Kah Yin) > Structural Formula of carbon compound.
Pages: [1]   Go Down
« previous next »
  Print  
Author Topic: Structural Formula of carbon compound.  (Read 996 times)
0 Members and 1 Guest are viewing this topic.
Pua Yoke Ching
SMK Taman Mutiara Rini
Teacher
Novice Member
*

Fame: 0
Offline Offline

Gender: Female
Posts: 16


Johor
« on: April 08, 2009, 05:22:43 PM »
can i draw the structural formula of the carbon compound as below:


- the methyl group is draw in condensed form
-is it correct?
-is it must be draw in expanded form?
There are 1 attachment(s) in this post which you cannot view or download
diagram 1.jpg
Logged
SMK Taman Mutiara Rini,
Johor, JB
Tay Guan Piang
SMK St. Augustine
Teacher
Veteran Member
*

Fame: 12
Offline Offline

Gender: Male
Posts: 730


Be Smart :)
« Reply #1 on: April 09, 2009, 07:20:43 AM »
Just sharing, and please correct me if i am wrong. There is nothing wrong with the diagram attach. but for drawing isomers, alkyl group must be expanded. but when explaining a reaction using chemical equation, it can be written as above diagram.

 Cheesy Cheesy
Logged
SMK St. Augustine
Elegant & Charming
Jong Kah Yin
SM Sains Kuching
Moderator
Full Member
*

Fame: 1
Offline Offline

Gender: Male
Posts: 133


Kimia
« Reply #2 on: April 09, 2009, 10:39:39 AM »
To be exact, i  prefer students to show the expanded form as the structural formula, by definition, shows the arrangement of atoms of each element in the molecule and its chemical bonds.  At this very moment, it can still be accepted in SPM exams as part of the structural formula. 
Logged
Jong Kah Yin
Guru Cemerlang Kimia
SM Sains Kuching
082-642544 (Pejabat)
019-8899922 (HP)
Tay Guan Piang
SMK St. Augustine
Teacher
Veteran Member
*

Fame: 12
Offline Offline

Gender: Male
Posts: 730


Be Smart :)
« Reply #3 on: April 09, 2009, 04:54:38 PM »
Quote from: Jong Kah Yin on April 09, 2009, 10:39:39 AM
To be exact, i  prefer students to show the expanded form as the structural formula, by definition, shows the arrangement of atoms of each element in the molecule and its chemical bonds.  At this very moment, it can still be accepted in SPM exams as part of the structural formula. 

Thanks a lot, Mr. Jong for the information. Cheesy Cheesy Cheesy
Your sharing is kindly appreciated. Cheesy Cheesy
Logged
Pua Yoke Ching
SMK Taman Mutiara Rini
Teacher
Novice Member
*

Fame: 0
Offline Offline

Gender: Female
Posts: 16


Johor
« Reply #4 on: April 10, 2009, 05:03:50 PM »
thanks a lot..
it's really solve my problem. Smiley
Logged
Mohd Rizuan Mohd Nor
SMA Al Madrasah Al Alawiyah Ad Diniah, Perlis
Teacher
Junior Member
*

Fame: 0
Offline Offline

Gender: Male
Posts: 60



WWW
« Reply #5 on: July 04, 2009, 05:49:34 PM »
Is it the structural name : 2-methylpropene
Logged
Mohd Rizuan Bin Mohd Nor
Guru Data,
SMA Al Madrasah Al Alawiyah Ad Diniah, Perlis (SABK)
<-- Check my website
Jong Kah Yin
SM Sains Kuching
Moderator
Full Member
*

Fame: 1
Offline Offline

Gender: Male
Posts: 133


Kimia
« Reply #6 on: July 04, 2009, 10:49:00 PM »
Yes, you are correct, En. Mohd Rizuan!
Logged
Mohd Rizuan Mohd Nor
SMA Al Madrasah Al Alawiyah Ad Diniah, Perlis
Teacher
Junior Member
*

Fame: 0
Offline Offline

Gender: Male
Posts: 60



WWW
« Reply #7 on: October 11, 2009, 12:09:33 AM »
2-methylpropene also can be named methylpropene because there's only one way to put double bond whereas all are identical....
Logged
Patrick Chai Teck Khiong
SMK Rosli Dhobi
Teacher
Junior Member
*

Fame: 0
Offline Offline

Gender: Male
Posts: 88
« Reply #8 on: October 19, 2009, 12:31:41 PM »
En.Rizuan, ur concept is correct.  But normally side chain which not attached with number 1 must be named as 2-methylpropene. Am i correct?
Logged
Patrick Chai Teck Khiong,
Guru,
SMK Rosli Dhoby
James Bengak Anak Kumpang
SM Sains Miri
Teacher
Novice Member
*

Fame: 0
Offline Offline

Posts: 20
« Reply #9 on: April 08, 2010, 09:32:06 AM »
helo...both answer (from mr rizuan & mr patrick) are correct, but only smart student do understand it...the important part is, our student must understand the basic concept 1st..."Hidup Chemistry"
Logged
James Bengak Anak Kumpang
SM Sains Miri
Pages: [1]   Go Up
  Print  
« previous next »
 
Jump to:  

Search
Stats
PIPPBahagian Pembangunan Kurikulume-Paymente-Hasil
Powered by MySQL Powered by PHP Powered by SMF 1.1.16 | SMF © 2011, Simple Machines | Sitemap Valid XHTML 1.0! Valid CSS!
Page created in 0.099 seconds with 27 queries.