To find out whether there are any other isomers: think about the Pt(II) complex ion in the three isomers shown, and look at the pattern of successive replacements of ammonia by chloride around the Pt(II):
Isomer
# of ammonias coordinated to Pt(II)
# of chlorides coordinated to Pt(II)
[PtII(NH3)4]2+[PtIVCl6]2-
4
0
[PtII(NH3)3Cl]+[PtIV(NH3)Cl5]-
3
1
[PtIV(NH3)4Cl2]2+ [PtIICl4]2-
0
4

Inspection of this table shows that there is a missing isomer, whose formula has 1 ammonia and 3 chlorides bonded to Pt(II):

  [PtIV(NH3)3Cl3]+ [PtII(NH3)Cl3]-


Back to Lecture 6


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Created January 20 1001 by M. F. Richardson
© Brock University, 2001