[lexD]

I want a hydrocarbon without oxygen that has good insulation for electrowining
I was thinking a central carbon atom with 4 methyl elements around it.
How can someone work out the name of such an element.
Is their an index or can I use the CAS no some how. What is available to me espically from the internet.

[Alwin Kristen]

Neopentane?

[Hunter2]

or 2,2-Dimethyl-propane

[Arkcon]

lexD: you could have tried to figure this one out on your own.  A carbon, with 4 methyls is 5 total carbons, and we use the the prefix pent- in that case.  A quck Google or Wikipedia search on pentane gives you a useful link: https://en.wikipedia.org/wiki/Pentane#Isomers  This could help you solve the next such question on your own.

[lexD]

Arkcon, Thanks for the good reply
The real name is: - 2,2-dimethylpropane, that's what I was thinking about
The 'di' means 2
The 'methyl' gives me the CH3
The 2-2 does that mean   2 + 2 methyl
why is their not Quad used in the name

If I had a Benzene with 3 methyl's
what am I looking for   3- Methylbenzal
 

[AWK]

https://www.wikiwand.com/en/Trimethylbenzenes

[lexD]

Interesting chemical but likely to be expensive
It does not fully answer my question

please can you give me a list
di = 2
tri = 3
.
.
a benzene mite hold 12 methyls but is likely to be too expensive to buy or manufacture

[Hunter2]

The naming comes from Latin or Greek language.

 1 Mono, 2 di, 3 tri, 4 tetra, 5 penta, 6 hexa, 7 hepte, 8 octa, 9 nona, 10 deca, 11 undeca, 12 duodeca, etc. 

Benzen can have max 6. Methyl groups not 12. Cyclohexan can have max 12 of them.

[Alwin Kristen]

You might find this link useful for naming compounds.

Trimethylbenzenes isn't expensive. You can check it from Sigma Aldrich. Production is also quite easy. Atleast in theory.

You can find numerical prefixes from internet but I put them here also just in case:

mono
di
tri
tetra
penta
hexa
septa
octa
nona
deka

ps. 2,2-dimethyl-propane has those numbers at front. You dont sum it! Numbers indicate the place of functionalgroups (in this case the methyl groups) in main carbon skeleton (in this case the propane. You know it because it is the longest.).

Why do you need all this information? I think you are not so into chemistry to learn this just for fun. I bet you have some kind of plan to build a new insulator or something. Am i right?

[lexD]

I get it the numbers mean the clock direction of methyl on the benzine

[Hunter2]

The numbers should be so low as possible. Like 1,2,5-Trimethylbenzene and not 1,3,6-Trimethylbenzene.

[Arkcon]

Start with Alwin Kristen:'s link on organic nomenclature.  For your fist question, we simply don't name things tetra methane, it is actually two methanes, on the 3 carbon chain.  See is you can follow the rules on that page, and give the substituted benzene you need the correct name.