VCE Stuff > VCE Chemistry

ligand q

<< < (4/4)

Collin Li:

--- Quote from: "Kopite" ---oh and coblin, do you have any advice on the writing of equations??? there seems to be at least 2 options for every reaction!!!! are the general equations we learnt in unit 3 sufficient for unit 4???
--- End quote ---


Yeah, I don't know what you mean by the general equations though... that was more of a year 10 or year 11 thing. I think if you mean those acid + base reactions... then you might want to have a look at some in your text book: they're not particularly as easy because if you have an acidic oxide with no free H+ (i.e.: SO2), what do you do? :P

Jasper:

--- Quote from: "coblin" ---Well, I'm not sure what VCE does, because they do their ligands completely wrong! The formula should be:

[Cu(NH3)4(H2O)2]SO4

The SO4 2- ion is just a "counterion" to balance the charge of the overall complex in the square brackets. Copper is in an octahedral 6 coordinate complex, with the ligands NH3 and H2O.

NH3 and H2O are the only ones you show the dotted lines linking to, because they are the actual ligands. The SO4 2- "counterion" only balances out the +2 charge that the copper centre possesses, but it is only an electrostatic attraction (as opposed to a ligand interaction, i.e.: the dotted lines you use in VCE).
--- End quote ---


We don't have to draw in the counterion when it asks to draw the complex, right?

Collin Li:

--- Quote from: "Jasper" ---
--- Quote from: "coblin" ---Well, I'm not sure what VCE does, because they do their ligands completely wrong! The formula should be:

[Cu(NH3)4(H2O)2]SO4

The SO4 2- ion is just a "counterion" to balance the charge of the overall complex in the square brackets. Copper is in an octahedral 6 coordinate complex, with the ligands NH3 and H2O.

NH3 and H2O are the only ones you show the dotted lines linking to, because they are the actual ligands. The SO4 2- "counterion" only balances out the +2 charge that the copper centre possesses, but it is only an electrostatic attraction (as opposed to a ligand interaction, i.e.: the dotted lines you use in VCE).
--- End quote ---


We don't have to draw in the counterion when it asks to draw the complex, right?
--- End quote ---


Nope. If you want to be safe, you can just draw the complex, put it in square brackets, with the charge outside, then draw the SO4 2- ion next to it (and there wouldn't be any dashed lines indicating an interaction... it's just how you write ionic structures, you write the cation then the anion).

Navigation

[0] Message Index

[*] Previous page