eg, 1,1,1 trichloroethylene or n,l,lysergic acid diethylamide
2007-04-26 09:53:33 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Mr Payne has flushed the word 'chirality' from my deep thought and n seems to refer to aliphatic molecules. I looked up 2-4-D today and could relate what I've heard so far to that.
2007-04-27 08:00:13 · update #1
the three ones show the positions of the functional group. After it is the word 'tri' which reinforces the idea that there are three chlorine atoms on the first carbon.
For more about naming organic molecules see the Science Aid site:
http://scienceaid.co.uk/chemistry/organics/nomenclature.html
2007-04-27 07:52:17 · answer #1 · answered by Anonymous · 1⤊ 0⤋
The numbers represent the position of atoms on the hydrocarbon chain. In the example that you give, 1,1,1-trichloroethylene, there are three chlorines on the molecule. The 1,1,1 tells you that all three of them are on the first carbon atom.
The letter l describes one of the mirror images of a molecule, the letter d would be the other mirror image. Think about you left and right hand. They are exactly alike except there is no way that you can rotate they so that they are facing the same direction and they completely overlap. This is true for some molecules as well, especially biological molecules.
The letter n tells you that a hydrocarbon chain is linear as opposed to branched.
2007-04-26 10:11:29 · answer #2 · answered by Mr. Payne 3 · 0⤊ 0⤋
the letters and numbers indicate where in the molecule the substituents are. for example, on 1,1,1-trichloroethylene the chlorine atoms are all on the first carbon. when you see a "D" or "L", the name is indicating the stereochemistry about the enantiomeric center.
2007-04-26 10:06:23 · answer #3 · answered by dchapleau 1 · 1⤊ 0⤋
If there is a number or series of numbers (e,g. 1 Methyl Propane or 2,2 Dimethyl Propane),
the numbers refer to which carbon atom the group, named after the said numbers, is bonded to,
If it is a letter, the letter usually represents a certain isomer of that compound (e,g. n-decane is a straight chained, ten carbon atom molecule)
the most common letter you will see is 'n' and it represents the straight chained or simplest isomer of that compound.
2007-04-26 12:37:24 · answer #4 · answered by mathwiz1 4 · 0⤊ 0⤋
The 1, 1, 1 indicates that all three chlorine atoms on trichloroethane (pardon: you mis-named the compound. It is 1,1,1-trichloroethane).
In the second part, you have got it wrong again. Lysergic acid, N,N-diethylamide
2007-04-26 10:02:35 · answer #5 · answered by steve_geo1 7 · 1⤊ 3⤋