AS: How the heck do you revise that avalanche of Cs, Hs, Os, names and formulae? Watch

ozzyoscy
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There I was reading my first Chemistry textbook, reading about electron shells, bonds and forces. Ok, doable.

I reach the middle and it goes PRRRRRP and ****s out a load of Cs, Hs, Os and arrows pointing here, there and everywhere. All the stuff about alkanes, functional groups, alcohol, structures, the ethyls, the xylics, the bromos. You/I have to remember every single bit of that? very little line, every little number, every exact amounts of CHs in a row? Is that possible?

I'm self-studying this as the fourth AS subject alongside Physics and Maths/Further Maths, I was expecting more of the same but this is crazy, mang. Is this the kind of subject which you have to love and be doing full-on like you're gonna do it at uni? 'Cause maybe I should save my money and do another subject instead. Dayum.
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User990473
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You need to learn how to name them - don't just memorise each one! That would be insane!
http://www.chemguide.co.uk/basicorg/...ons/names.html
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ozzyoscy
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(Original post by Occams Chainsaw)
You need to learn how to name them - don't just memorise each one! That would be insane!
http://www.chemguide.co.uk/basicorg/...ons/names.html
So just recognise by looking at them? Just remember that numbering of Cs starts at the right and all that ****, rather than all the names of the combinations of Cs and Hs and CHs you can get out there?
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User990473
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(Original post by ozzyoscy)
So just recognise by looking at them? Just remember that numbering of Cs starts at the right and all that ****, rather than all the names of the combinations of Cs and Hs and CHs you can get out there?
Basically, yes. You learn the technique of being being able to identify a molecule.
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charco
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(Original post by ozzyoscy)
So just recognise by looking at them? Just remember that numbering of Cs starts at the right and all that ****, rather than all the names of the combinations of Cs and Hs and CHs you can get out there?
Numbering of carbons does not start at the right.

It starts at the end of the chain that gives attachments to the chain the lowest numbers, unless the chain has a carboxylic acid or aldehyde group at the end in which case its carbon is taken as #1.

There is a series of priorities attached to each group and it gets VERY complicated, however for A level it's pretty simple to learn those required.
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ozzyoscy
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(Original post by charco)
Numbering of carbons does not start at the right.

It starts at the end of the chain that gives attachments to the chain the lowest numbers, unless the chain has a carboxylic acid or aldehyde group at the end in which case its carbon is taken as #1.

There is a series of priorities attached to each group and it gets VERY complicated, however for A level it's pretty simple to learn those required.
Ohhhhhhhhhhhh I suppose I'll get it eventually.
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danlocke
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(Original post by ozzyoscy)
Ohhhhhhhhhhhh I suppose I'll get it eventually.
There are a few videos here that might help you, and there are several more by other people available. The IUPAC nomenclature (naming) system is very logical, and isn't too difficult to understand once you're used to it.
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ozzyoscy
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(Original post by danlocke)
There are a few videos here that might help you, and there are several more by other people available. The IUPAC nomenclature (naming) system is very logical, and isn't too difficult to understand once you're used to it.
Thanks, mang. Resources are always good.
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