117678-68-9

Basic information

• Product Name: dodecacarbonyltetrairidium
• Synonyms: dodecacarbonyltetrairidium
• CAS NO: 117678-68-9
• Molecular Weight: 1105
• Mol File: 117678-68-9.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: dodecacarbonyltetrairidium(CAS DataBase Reference)
• NIST Chemistry Reference: dodecacarbonyltetrairidium(117678-68-9)
• EPA Substance Registry System: dodecacarbonyltetrairidium(117678-68-9)

Safety Data

• Hazardous Substances Data: 117678-68-9(Hazardous Substances Data)

Upstream product

• 201230-82-2 carbon monoxide 
• 1339123-96-4 N(C₂H₅)4⁽¹⁺⁾*Ir₄(CO)10P(C₆H₅)2C₆H₄^(1-)=N(C₂H₅)4Ir₄(CO)10(P(C₆H₅)2C₆H₄) 

Downstream Products

• 287970-74-5 [Ir₄(CO)8(1,1-bis(diphenylphosphino)ethene)2] 
• 197444-75-0 H₄Ir₄(CO)4(Fe(C₅H₃P(C₆H₅)2)(C₅H₄P(C₆H₅)C₆H₄))2 
• 84786-06-1 N(CH₃)3(CH₂C₆H₅)⁽¹⁺⁾*Ir(CO)4^(1-) = [N(CH₃)3(CH₂C₆H₅)][Ir(CO)4] 

Relevant articles and documents

Transmetalation reactions yield new tetra- and pentairidium carbonyl complexes containing σ-bonded phenyl rings

The new air-stable σ-phenyl tetrairidium carbonyl salt [Et 4N][Ir4(CO)11Ph], 1, has been obtained by transmetalation reactions between [Et4N][Ir4(CO)11Br] and SnPh3OH in 45% yield or SnPh4 in 36% yield. Compound 1 reacts with PPh3 to yield the complex [Et4N][Ir 4(CO)11(PPh2C6H4)], 2, which contains an ortho-metalated bridging PPh2C6H4 ligand across an edge of a tetrahedral cluster of four iridium atoms. Compound 2 reacts with Ir(CO)(PPh3)2Cl by halide displacement to yield the two new uncharged pentairidium complexes Ir5(CO)12(Ph) (PPh3), 3, and Ir5(CO)11(PPh 3)(PPh2C6H4), 4. Compounds 3 and 4 both contain trigonal-bipyramidal clusters of iridium atoms. Compound 3 contains a σ-phenyl ligand coordinated to one of the apical iridium atoms. Compound 4 contains an ortho-metalated PPh2C6H4 ligand that bridges an apical-equatorial edge of the trigonal-pyramidal cluster of metal atoms. Compound 4 was also obtained from 3 by reaction with PPh 3.

Chemistry of Tetrairidium Carbonyl Clusters. Part 1. Synthesis, Chemical Characterisation, and Nuclear Magnetic Resonance Study of Mono- and Di-substituted Phosphine Derivatives. X-Ray Crystal Structure Determination of the Diaxial Isomer of

The reactions of the anionic cluster with uni- and bi-dentate phosphines and arsines have been investigated.The bromide ligand is quatitatively displaced by 1 mol equivalent of phosphine or arsine at low temperature, the only complexes being formed under these mild conditions being the monosubstituted products (L=PPh3, PPh2Me, PPhMe2, or AsPh3), (L-L=trans-Ph2PCH=CHPPh2), and .Similar reactions with higher than stoicheiometric amounts of phosphine (L=PPh3, PPh2Me, or PPhMe2) or diphosphine give in good yields the disubstituted compounds respectively.The stereochemical arrangements of the phosphine ligands and the dynamic processes occurring in solutions of these complexes are discussed on the basis of i.r. and n.m.r. data.The structure of the diaxial isomer of CO)3(Me2PCH2CH2PMe2)> has been determined by X-ray diffraction.The complex crystallizes in the monoclinic space group P21/c, with cell constans a=15.694(2), b=10.403(2), c=15.706(2) Angstroem, β=92.63(2) deg, and Z=4.The structure has been solved from 2289 diffraction intensities collected by counter methods, and refined by least-squares calculations to R=0.087 (R'=0.091).The four iridium atoms define a tetrahedron with three bridging CO ligands around a triangular face.All remaining carbonyls are terminally bonded and the two P atoms of the Me2PCH2CH2PMe2 ligand are found in axial positions, generating a six-membered ring.