Stability and reactivity of the cis-PtIIR(alkyne) fragment (R = alkyl): an unprecedented rearrangement to form the PtII(η3-allyl) moiety
Abstract
The complexes
[PtR(η
2
-E-MeO
2
CCH![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
CHCO
2
Me)(phen)]
+
BF
4
-
(R = Me 1a or Et 1b;
phen = 1,10-phenanthroline) reacted with alkynes yielding
the corresponding products
[PtR(η
2
-alkyne)(phen)]
+
BF
4
-
2. These can be isolated in the case of
disubstituted electron-rich alkynes, while the electron-poor
MeO
2
CC![[triple bond, length as m-dash]](https://www.rsc.org/images/entities/char_e002.gif)
CCO
2
Me inserted into the
Pt–R bond leading to the corresponding σ-vinyl derivative.
Type 2 complexes containing alk-1-ynes undergo an unprecedented
rearrangement to form stable
[Pt(η
3
-allyl)(phen)]
+
BF
4
-
products. Mechanistic aspects of the reaction are
discussed.
CHCO
2
Me)(phen)]
+
BF
4
-
(R = Me 1a or Et 1b;
phen = 1,10-phenanthroline) reacted with alkynes yielding
the corresponding products
[PtR(η
2
-alkyne)(phen)]
+
BF
4
-
2. These can be isolated in the case of
disubstituted electron-rich alkynes, while the electron-poor
MeO
2
CCCCO
2
Me inserted into the
Pt–R bond leading to the corresponding σ-vinyl derivative.
Type 2 complexes containing alk-1-ynes undergo an unprecedented
rearrangement to form stable
[Pt(η
3
-allyl)(phen)]
+
BF
4
-
products. Mechanistic aspects of the reaction are
discussed.
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