[organ_ic]

Hi there

can someone please answer these (probably dumb) questions

is 2-butanol the same as butan-2-ol??
3-chloro-penten-2oic acid the same as 3-chloro-2-pentenoic acid?

Thanks
organ_ic

[Albert]

Yes, they are just different ways of naming the same molecule. And this is not a dumb question.

[organ_ic]

hey there

thanks for the reply...umm its wrong to say...3-chloro-pent-2-enoic acid right? cos the suffix has to be oic aye?

and another thing i just came across a question where it tells me to draw trans -1,3-dichlorocyclohexane and so I thought seeing as its trans both substituents have to be either BOTH axial or BOTH equatorial but in the answer it has one of each-why!! am i missing something?

Thanks
organ_ic

[xiankai]

is 2-butanol the same as butan-2-ol??

according to IUPAC nomenclature, the latter is prefered to avoid ambiguity (people may think u have left out the prefix, etc.)

3-chloro-penten-2oic acid

did u mean 3-chloro pentan-2-oic acid? because the 'e' suggests the presence of an alkene group, which should be included in the prefix and not the suffix.

3-chloro-penten-2oic acid the same as 3-chloro-2-pentenoic acid?

same as above, former is prefered.

its wrong to say...3-chloro-pent-2-enoic acid right? cos the suffix has to be oic aye?

while the meaning gets across in both compounds (vaguely), the one that u called 'wrong' is not the proper way of naming, so yes the suffix has to be -oic

[P-man]

is 2-butanol the same as butan-2-ol??

according to IUPAC nomenclature, the latter is prefered to avoid ambiguity (people may think u have left out the prefix, etc.)

Don't you mean former? As in the first one mentionned? Because that is always how I have seen it. 2-butanol.

[xiankai]

thats weird. my lecture notes taught it as butan-2-ol. i'll look up IUPAC later.

[Will]

xiankai is right I think. The 2 being before th -ol means that it is definitely referring to the hydroxyl. I always write it out as butan-2-ol.

[P-man]

Yeah, I guess it's true. I have also seen it as butan-2-ol.