Hexadecacarbonylhexarhodium
From Infogalactic: the planetary knowledge core
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Names | |
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IUPAC name
Hexadecacarbonylhexarhodium
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Other names
Hexarhodium hexadecacarbonyl
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Identifiers | |
28407-51-4 | |
Properties | |
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).
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Infobox references | |
Hexadecacarbonylhexarhodium is a metal carbonyl cluster with the formula Rh6(CO)16.[1] It exists as black crystals that are soluble in organic solvents.[2]
Discovery and synthesis
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:[3]
- 3 Rh2(O2CCH3)4 + 22 CO + 6 H2O → Rh6(CO)16 + 6 CO2 + 12 CH3CO2H
- 3 Rh2Cl2(CO)4 + 4 CO + 6 Cu → Rh6(CO)16 + 6 CuCl
Reactions and applications
Rh6(CO)16 catalyzes a number of organic reactions including hydrogenation and hydroformylation.[2]