How do you draw [Co(H2NCH2CH2NH2)3]2+?

A question requires me to draw it, but the markscheme just uses words rather than a diagram so I'm a bit confused. Thank you. :smile:

Reply 1

charco

Study Forum Helper

Original post by Magenta96

A question requires me to draw it, but the markscheme just uses words rather than a diagram so I'm a bit confused. Thank you. :smile:

The 1,2-diaminoethane H₂NCH₂CH₂NH₂ ligand is also known as ethylenediamine or (en) for short.

You can draw the complex showing three 'en' groups datively bonded using the nitrogen lone pair in two places (bidentate) to the central metal ion ...

Reply 2

Magenta96

Original post by charco

It's just the markscheme says I should do '---' between the nitrogen atoms too and I get what that is, it's 8bii on this link:

http://filestore.aqa.org.uk/subjects/AQA-CHEM5-W-MS-JUN13.PDF

Reply 3

AliceCaroline

really dodgy C-N bonding plus it looks disgusting because i had to press really hard on the sharpie to make it go through the paper (computer camera reverses the image)

but thats basically how it should sort of look - I'm sure yours will be neater!

Reply 4

Ellos66

Which statements are true about it?
1. It has cis and trans isomers
2. It has optical isomers
3. It is six fold coordination

Reply 5

helpwithchem

Original post by AliceCaroline

are their suppose to be arrows pointing towards the Co to show they are dative (coordinate) covalent bonds?

Reply 6

aj_11_04

Original post by helpwithchem

are their suppose to be arrows pointing towards the Co to show they are dative (coordinate) covalent bonds?

Reply 7

alaziziomar_

Original post by AliceCaroline

really dodgy C-N bonding plus it looks disgusting because i had to press really hard on the sharpie to make it go through the paper (computer camera reverses the image)
but thats basically how it should sort of look - I'm sure yours will be neater!

why does nitrogen have 2 hydrogens? that makes it have 4 bonds in total, shouldn't it only make 3?

Reply 8

Methene

Original post by alaziziomar_

why does nitrogen have 2 hydrogens? that makes it have 4 bonds in total, shouldn't it only make 3?

It makes a dative covalent bond to the Co using its lone pair of e-

Reply 9

alaziziomar_

Original post by methene

It makes a dative covalent bond to the Co using its lone pair of e-

I didnt expect a reply to a 14 year old thread but thanks a lot. I realised this literally a minute after I posted.
Thank you sm tho

(edited 1 year ago)

Reply 10

panda41

Original post by AliceCaroline

really dodgy C-N bonding plus it looks disgusting because i had to press really hard on the sharpie to make it go through the paper (computer camera reverses the image)
but thats basically how it should sort of look - I'm sure yours will be neater!