October 31, 2024, 11:40:42 PM
Forum Rules: Read This Before Posting


Topic: complexes  (Read 4418 times)

0 Members and 1 Guest are viewing this topic.

Offline chantiella

  • New Member
  • **
  • Posts: 3
  • Mole Snacks: +0/-0
complexes
« on: May 21, 2011, 09:26:24 AM »
what kind complex does form in this reaction- FeCl3+KSCN+H2O :rarrow: ? I used to think it is [Fe(SCN)(H2O)3]Cl2 but now I know it is wrong..

Offline DevaDevil

  • Chemist
  • Full Member
  • *
  • Posts: 690
  • Mole Snacks: +55/-9
  • Gender: Male
  • postdoc at ANL
Re: complexes
« Reply #1 on: May 24, 2011, 03:44:15 PM »
are you sure both thiocyanide AND chloride are present in the complex?

Offline BluePill

  • Full Member
  • ****
  • Posts: 100
  • Mole Snacks: +6/-2
  • Gender: Male
  • Difficult is never synonymous to impossible.
Re: complexes
« Reply #2 on: June 13, 2011, 05:51:22 AM »
I'm thinking [Fe(SCN)3H2O] and KCl

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7978
  • Mole Snacks: +555/-93
  • Gender: Male
Re: complexes
« Reply #3 on: June 13, 2011, 07:21:55 AM »
It depends on amount of KSCN. (up to K2[Fe(SCN)5H2O])
AWK

Offline cheese (MSW)

  • Not a
  • Full Member
  • ****
  • Posts: 144
  • Mole Snacks: +15/-23
  • Gender: Male
Re: complexes
« Reply #4 on: August 19, 2011, 12:52:35 AM »
"The blood-red colour produced by mixing aqueous solutions of Fe(III) and SCN^- (and which provides a well-known test for Fe(III)) is largely due to
[Fe(SCN)(H2O)5]^2+ but, in addition to this, the simple salt Fe(SCN)3 and salts of complexes such as [Fe(SCN)4]^- and Fe(SCN)6]^3- can also
be isolated."
N. N. Greenwood, A. Earnshaw, Chemistry of the Elements 2nd ed. (1997) p 1090.

Sponsored Links