Hexadecacarbonylhexarhodium

Hexadecacarbonylhexarhodium

Names
IUPAC name Hexadecacarbonylhexarhodium
Other names Hexarhodium hexadecacarbonyl
Identifiers
CAS Number	28407-51-4 Y
ECHA InfoCard	100.044.539
Properties
Chemical formula	C16O16Rh6
Molar mass	1065.62 g/mol
Appearance	Black crystals
Melting point	235 °C (455 °F; 508 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y  (what is YN ?)
Infobox references

Hexadecacarbonylhexarhodium is a metal carbonyl cluster with the formula Rh₆(CO)₁₆. It exists as black crystals that are soluble in organic solvents.

Rh₆(CO)₁₆ was first prepared by Heiber in 1943 by carbonylation of RhCl₃·3H₂O at 80-230 °C and 200 atm carbon monoxide with silver or copper as a halide acceptor. It was incorrectly formulated as Rh₄(CO)₁₁. Subsequently, the carbonylation of a mixture of anhydrous rhodium trichloride and iron pentacarbonyl was shown to give good yields of Rh₆(CO)₁₆. Other compounds of rhodium are also effective precursors such as Rh₂Cl₂(CO)₄ and rhodium(II) acetate:

Rh₆(CO)₁₆ catalyzes a number of organic reactions including hydrogenation and hydroformylation.