Hello!
I have a question that leaving me stumped. So E means opposite and Z means together. In order to do this alternate cis/trans arrangement you have to order molecules a priority either 1 and 2. You have to go along either side of double bond and determine priority. I'm so lost with these molecules.
here is what I came up with
First one is E
Second: don't know how to differientiate with one F and the Cl's
Third: don't know if this is even a E, Z
Fourth: Definitely Z
Sixth: Unsure between the F on one side and C on the other. Does this mean Z.
here are the molecules.
h t t p://img242.imageshack.us/img242
/933/picture2jt7.png
you'll have to copy paste it.
Please HElp!!!
Thanks!!
Your URL is not properly typed. It should have been:
http://img242.imageshack.us/img242/933/picture2jt7.png
(Typed, not pasted. Your URL has spaces and carriage returns that should not be there)
The high priority groups on the 2nd formula are:
C3H5Cl2 on the left side of the double bond and F on the right side. It is an E isomer.
The four groups on the 3rd formula are: CH3 and CH3 on the left side of the double bond. H and F on the right. You assign priorities and decide the type of isomer.
The four groups on the last formula are:
C5H11 and C3H7 on the left. H and F on the right. You assign priorities and decide isomer type.
Your first and fourth formulas are labeled correctly.
Hi GK!
Does this mean that there are 4 molecules with the E configuration? All but molecules four are E configurations?
Thanks So Much For Your HElp!
Hello!
I understand that you are having trouble determining the cis/trans configuration of the molecules you provided. Let's go step by step to help you figure it out.
To determine the cis/trans configuration, you need to assign priority to the atoms or groups attached to the double bond. The priority is determined based on the atomic number of the atoms attached. The higher the atomic number, the higher the priority.
Now, looking at the first molecule, it seems that you have determined it to be E. To confirm this, you need to assign priority to the atoms or groups on both sides of the double bond. Without being able to see the molecule directly, it is difficult for me to assist you further. However, here is a general guideline to help:
1. Look at the atoms directly bonded to the double bond. Assign priority based on their atomic number.
2. If two atoms have the same element directly bonded to the double bond, move one step further and look at the atoms attached to those atoms. Continue this process until you find a point of difference.
3. If you encounter a double bond or a triple bond while moving along the chain, count each bond as if it were an additional bonded atom.
Repeat this process for each molecule you provided, and you should be able to determine their cis/trans configurations.
If you are having difficulty identifying the priority given the specific atoms and groups in the molecules you provided, I suggest referring to a stereochemistry textbook or consulting with a chemistry professor for further assistance. Additionally, online resources and molecular modeling software can also be helpful tools in visualizing and determining the cis/trans configuration.
I hope this explanation helps you in determining the cis/trans configuration of the molecules you have. If you have any further questions, please feel free to ask.