What is the IUPAC name for the molecule shown here?
H I
\ /
C=C
/ \
I H
THE H IS ATACHED TO ONE C ON TOP THEN H ON THE BOTTOM TO THE 2ND C SAME WITH I IT JUST GOT SCRWED UP BUT HELP
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I would name this cis-diiodoethene
what is the palce ment of the iodine on the carbons?
I didn't know what to do with that so I didn't number them. They are cis-1,2-diiodoethene BUT cis IMPLIES they must be on different carbons. If we had 1,1-diiodoethene (we wouldn't name it 2,2-diiodoethene because 1,1 uses smaller numbers) there is no need for cis or trans. Bottom line is if both I groups are on the same C (either 1 or 2 carbon) cis/trans is not necessary. The ONLY reason cis/trans is necessary is when the I groups are on separate C atoms so I think there is no ambiguity. Having said all of that please know that I'm not an organic chemist and IUPAC has changed all of the naming rules long after I was in school. I have trouble remembering cis/trans vs E/Z
I have no idea why I named this cis because the I atoms are on opposite side and it should be named trans. I just had cis on my mind when I typed it in and typed in cis--Sorry about that.
To determine the IUPAC name of a molecule, we need to follow a set of rules provided by the International Union of Pure and Applied Chemistry (IUPAC).
In this case, the molecule consists of two iodine (I) atoms bonded to a carbon (C) atom, which is in turn double bonded to another carbon atom. Each carbon atom is also bonded to a hydrogen (H) atom.
To begin, let's identify the longest continuous chain of carbon atoms in the molecule. In this case, the longest chain consists of two carbon atoms.
Next, let's assign a prefix to describe the substituents on the carbon chain. Since we have two iodine atoms attached to the carbon chain, we use the prefix "di-" to indicate two substituents.
Now, let's assign a number to each carbon atom in the chain. We want to choose the lowest numbers possible for the substituents. In this case, it doesn't matter which end we start numbering from since the substituents are the same. Let's start numbering from the right carbon atom.
Now we can put all the pieces together to generate the IUPAC name. The name for this molecule is:
1,2-diiodoethene
Explanation:
- "1,2" indicates the positions of the substituents on the carbon chain.
- "di-" represents two substituents.
- "iodo" describes that the substituents are iodine atoms.
- "ethene" refers to the presence of a double bond between the carbon atoms.
So, the IUPAC name for the molecule shown is 1,2-diiodoethene.