Instead can I think that on carbon 1 there is 3 flourine so (3) + (2) Br +(2)Cl so 7 in total
If numbered right to left it will be (1)Cl+(1)Br +(6) F total 8
So number from left to right as lowest
F > Cl > Br > I - that is the order that their numbers are assigned (assuming there aren't any functional groups determining the numbering) - this matches your OP. But naming is done alphabetically.
F > Cl > Br > I - that is the order that their numbers are assigned (assuming there aren't any functional groups determining the numbering) - this matches your OP. But naming is done alphabetically.
What do you mean by like the thing in the bracket?
Do u mean like 2-bromo-1-iodo-hexane?
Therefore this determines the numbering am I right? So u don't use F>Cl>Br>I
Compared to the 2-bromo-2 chloro-111 trifloroethane that there arnt any functional groups determining numbering. So use F>Cl.......
Correct me if I'm wrong, but I think it should be 2-bromo-2-chloro-1,1,1-trifluoroethane.
The bromo- comes first in the name due to alphabetical ordering, thus followed by chloro- and fluoro-.
If the carbon bonded to three fluorines is treated as carbon '1', then the total number when adding up the numbers in the name is lower, as 2+2+1+1+1=7, whereas if the fluorine-bonded carbon was carbon '2', the total number would be higher as 1+1+2+2+2=8.
I was taught that the name which gives the lowest total of numbers is the correct one to use, therefore 2-bromo-2-chloro-1,1,1-trifluoroethane would be correct.
Correct me if I'm wrong, but I think it should be 2-bromo-2-chloro-1,1,1-trifluoroethane.
The bromo- comes first in the name due to alphabetical ordering, thus followed by chloro- and fluoro-.
If the carbon bonded to three fluorines is treated as carbon '1', then the total number when adding up the numbers in the name is lower, as 2+2+1+1+1=7, whereas if the fluorine-bonded carbon was carbon '2', the total number would be higher as 1+1+2+2+2=8.
I was taught that the name which gives the lowest total of numbers is the correct one to use, therefore 2-bromo-2-chloro-1,1,1-trifluoroethane would be correct.
But what about 4-chloro-2,3 - diflouropentane.
If you add them up either side it is the same number each side.
Correct me if I'm wrong, but I think it should be 2-bromo-2-chloro-1,1,1-trifluoroethane.
The bromo- comes first in the name due to alphabetical ordering, thus followed by chloro- and fluoro-.
If the carbon bonded to three fluorines is treated as carbon '1', then the total number when adding up the numbers in the name is lower, as 2+2+1+1+1=7, whereas if the fluorine-bonded carbon was carbon '2', the total number would be higher as 1+1+2+2+2=8.
I was taught that the name which gives the lowest total of numbers is the correct one to use, therefore 2-bromo-2-chloro-1,1,1-trifluoroethane would be correct.
It is 2-bromo-2-chloro-1,1,1-trifluoroethane, but I bet none of the UK exam boards would penalise the numbering the other way around.
CH2FCH2Cl is 2-chloro-1-fluoro-ethane. F is more senior than Cl, so takes the 1 position. Cl is earlier in the alphabet, so is written first.
CH2FCHClOH is 1-chloro-2-fluoro-ethan-1-ol. F vs Cl seniority now doesn't matter as OH is senior to both, OH gets the 1 position which determines F and Cl. Cl is earlier in the alphabet, so is written first. Since there are numbers needed, all numbers must be written hence the -1-ol bit.
It is 2-bromo-2-chloro-1,1,1-trifluoroethane, but I bet none of the UK exam boards would penalise the numbering the other way around.
CH2FCH2Cl is 2-chloro-1-fluoro-ethane. F is more senior than Cl, so takes the 1 position. Cl is earlier in the alphabet, so is written first.
CH2FCHClOH is 1-chloro-2-fluoro-ethan-1-ol. F vs Cl seniority now doesn't matter as OH is senior to both, OH gets the 1 position which determines F and Cl. Cl is earlier in the alphabet, so is written first. Since there are numbers needed, all numbers must be written hence the -1-ol bit.