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2. The Role Of The Leaving Group
For the reaction
[Pt(dien)X]
+
+ py ----------> [Pt(dien)(py)]
+
+ X
-
in H
2
O at 25
o
C the sequence of lability is;
NO
3
> H
2
O > Cl >Br > I > N
3
> SCN > NO
2
> CN
with a spread of over 10
6
in rate across series.
leaving group does not affect the nucleophilic discrimination factors only the intrinsic reactivity
the series tend to parallel the strength of the Metal--L bond
