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Dirhenium decacarbonyl

Dirhenium decacarbonyl

Other names	Rhenium carbonyl; rhenium pentacarbonyl
Identifiers
CAS number	14285-68-8
Properties
Molecular formula	Re₂(CO)₁₀
Molar mass	652.52 g/mol
Hazards
EU classification	Harmful (Xn)
R-phrases	R20
S-phrases	S36
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Dirhenium dodecarbonyl is an inorganic compound with the formula Re₂(CO)₁₀. Commercially available, it is used as a starting point for the synthesis of many rhenium carbonyl complexes. It was first reported in 1941 by Walter Hieber who prepared it by carbonylation of Re₂O₇.^[1] The compound consists of a pair of square pyramidal Re(CO)₅ units joined via a Re-Re bond. Mn₂(CO)₁₀ and Tc₂(CO)₁₀ adopt the same structure.

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Reaction with various halogens cleave the Re-Re bond:^[2]

Re₂(CO)₁₀ + X₂ → 2 Re(CO)₅X (X = Cl, Br, I)

When bromine is used, bromopentacarbonylrhenium(I) is formed; it is itself an intermediate for many more rhenium complexes.

References

^ W. Hieber, H. Fuchs (1941). "Über Metallcarbonyle. XXXVIII. Über Rheniumpentacarbonyl" (in German). Zeitschrift für anorganische und allgemeine Chemie 248: 256-268. doi:10.1002/zaac.19412480304.
^ Steven P. Schmidt, William C. Trogler, Fred Basolo (1990). "Pentacarbonylrhenium Halides". Inorganic Syntheses 28: 154-159. doi:10.1002/9780470132593.ch42.