Insertion of COS into Group 2 metal–ethoxide bonds; crystal structures of [Mg(OCSOEt)2(EtOH)4] and [Sr3(OCSOEt)6(EtOH)8]
Abstract
Some compounds of the alkaline-earth metals, which result from the
insertion of COS into metal–ethoxide bonds, have been synthesized and
characterised. The crystal structure of the first linear trinuclear metal
strontium complex [Sr
3
(OCSOEt)
6
(EtOH)
8
]
2, which resulted from the reaction of
[{Sr(OEt)
2
(EtOH)
4
}
n
]
with COS gas, has been determined. The octahedral monomer
[Mg(OCSOEt)
2
(EtOH)
4
] 1 resulted from the
insertion of a molecule of COS into the ethoxide bonds of
[{Mg(OEt)
2
(EtOH)
4
}
n
].
The structures demonstrate three alternative co-ordination modes of the
OCS(OR)
-
ligand.
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