Soccerboi's questions thread

[pi]

Only cysteine.

[dinosaur93]

Do we have to know the formation of disaccharaides and polysaccarides?

eg. glucose + glucose = ?

glucose + sucrose = ?

glucose + galactose = ?

[pi]

Do we have to know the formation of disaccharaides and polysaccarides?

eg. glucose + glucose = ?

glucose + sucrose = ?

glucose + galactose = ?

Yes

Haven't heard of that one

No

[Destiny]

Will increasing the pressure in HPLC increase the separation of components? Or decrease it.  Or have no effect?

[soccerboi]

Will increasing the pressure in HPLC increase the separation of components? Or decrease it.  Or have no effect?

I would say it would have no effect on separation, but would increase the rate at which components separate.

[soccerboi]

Can someone explain how you would name this? 2-ethylbut-1-ene?
Despite the longest carbon chain being 5, does the double bond change this to make the longest chain 4 carbons now?

[pi]

Yep, that's right

[charmanderp]

Can someone explain how you would name this? 2-ethylbut-1-ene?
Despite the longest carbon chain being 5, does the double bond change this to make the longest chain 4 carbons now?

It's the same as if there's a 4-carbon chain containing a hydroxyl group but the largest sequence of carbons is actually 6 or 7. It's the 'longest carbon chain containing a key funtional group' rather than the 'longest carbon chain' in general. Double bonds and triple bonds are functional groups and should be treated as such.

[soccerboi]

Can someone explain how you would name this? 2-ethylbut-1-ene?
Despite the longest carbon chain being 5, does the double bond change this to make the longest chain 4 carbons now?

It's the same as if there's a 4-carbon chain containing a hydroxyl group but the largest sequence of carbons is actually 6 or 7. It's the 'longest carbon chain containing a key funtional group' rather than the 'longest carbon chain' in general. Double bonds and triple bonds are functional groups and should be treated as such.

So would you call a double bond and 'alkene' functional group?

[soccerboi]

Can someone give me examples of molecules that show:
1. dipole-dipole interactions
2. Ion-dipole interactions

I know the meaning of the terms but sometimes have trouble identifying which is which when given a molecule.
Thanks

[thushan]

Can someone give me examples of molecules that show:
1. dipole-dipole interactions
2. Ion-dipole interactions

I know the meaning of the terms but sometimes have trouble identifying which is which when given a molecule.
Thanks

1. Two CH3Cl molecules
2. Na+ and H2O

[soccerboi]

Despite having a C=C bond, benzene can't undergo an addition reaction right? but instead undergoes substitution?

[charmanderp]

Despite having a C=C bond, benzene can't undergo an addition reaction right? but instead undergoes substitution?

Yes.