SCHEDULED MAINTENANCE
Alkyne-based derivatives of [Ru6C(CO)17] and the stepwise synthesis of [Ru6C(CO)13(η5-C5H 3Ph2)(µ3-CPh)]
Abstract
A systematic synthetic route to the hexanuclear cluster compound
[Ru
6
C(CO)
13
(η
5
-C
5
H
3
Ph
2
)(µ
3
-CPh)] has been elaborated in
which a number of stable intermediates have been isolated and
characterised. The reaction of [Ru
6
C(CO)
17
] with
Me
3
NO and phenylacetylene afforded the alkyne derivative
[Ru
6
C(CO)
15
(PhC
2
H)] 1. Further
treatment of 1 with Me
3
NO and an excess of
phenylacetylene resulted in the formation of two isomers
[Ru
6
C(CO)
14
{C(Ph)CHC(Ph)CH}] 2
and [Ru
6
C(CO)
14
{C(Ph)CHCHC(Ph)}]
3. Both contain five-membered metallocyclic rings formed by the
head-to-head coupling of phenylacetylene in one isomer and the
head-to-tail coupling in the other. Reaction of isomer 2 with
Me
3
NO and phenylacetylene leads to
[Ru
6
C(CO)
13
(η
5
-C
5
H
3
Ph
2
)(µ
3
-CPh)] 4. The molecular
structure of one of the isomers, 3, has been established by
single-crystal X-ray crystallography.
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