Dirhenium decacarbonyl

Dirhenium decacarbonyl
IUPAC name bis(pentacarbonylrhenium)(Re—Re)
Other names Rhenium carbonyl; rhenium pentacarbonyl
Identifiers
CAS number	14285-68-8 Y
ChemSpider	436546 Y
Jmol-3D images	Image 1
SMILES [Re].[Re].[C-]#[O+].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-].[O+]#[C-]
InChI InChI=1S/10CO.2Re/c10*1-2;; Y Key: ZIZHEHXAMPQGEK-UHFFFAOYSA-N Y InChI=1/10CO.2Re/c10*1-2;; Key: ZIZHEHXAMPQGEK-UHFFFAOYAX
Properties
Molecular formula	Re2(CO)10
Molar mass	652.52 g/mol
Melting point	170C (decomposes)
Hazards
EU classification	Harmful (Xn)
R-phrases	R20
S-phrases	S36
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Dirhenium decacarbonyl 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.

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

1. ^ W. Hieber, H. Fuchs (1941). "Über Metallcarbonyle. XXXVIII. Über Rheniumpentacarbonyl" (in German). Zeitschrift für anorganische und allgemeine Chemie 248 (3): 256–268. doi:10.1002/zaac.19412480304. 
2. ^ Steven P. Schmidt, William C. Trogler, Fred Basolo (1990). "Pentacarbonylrhenium Halides". Inorganic Syntheses 28: 154–159. doi:10.1002/9780470132593.ch42.