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Dalton Transactions
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Unfortunately, compound 8 could not be isolated in pure form 13.
despite repeated crystallisations, and the large number of
signals in the 31P NMR prevented assignment of the four 14.
expected signals for 8. Although the precise route of formation
of 8 is unclear, evidently the weaker As-Br bond as compared to
the As-Cl bond results in a less selective reaction and multiple 15.
oxidative addition steps involving a single arsenic centre. We
note in this regard that while GaBr3 undergoes oxidative 16.
addition to 1, GaCl3 prefers to form a MOLP between the
140, 5053-5056.
DOI: 10.1039/C8DT04995E
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In conclusion, we have reported the first confirmed oxidative
addition reactions of arsenic halides to a transition metal
element (Pt). The Pt(II) arsenide complexes represent the first
‒
structurally characterised metal complexes bearing AsX2
ligands. The nature of the halide is crucial in determining the
outcome of the reaction; whereas AsCl3 underwent a single
oxidative addition, use of AsBr3 led to the formation of a Pt3As2
cluster alongside the oxidative addition compound and other
products. We are now focussed on exploring the reactivity of
the halides of the remaining group 15 elements towards
electron-rich transition metal compounds in order to gain a full
understanding of this chemistry.
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Conflicts of interest
There are no conflicts to declare.
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Acknowledgements
Financial support from the Deutsche Forschungsgemeinschaft is
gratefully acknowledged.
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