134132-21-1

Basic information

• Product Name: {Fe₂Au₂(CO)8(C₂H₄(P(C₆H₅)2)2)}
• CAS NO: 134132-21-1
• Molecular Weight: 1128.13
• Mol File: 134132-21-1.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: {Fe₂Au₂(CO)8(C₂H₄(P(C₆H₅)2)2)}(CAS DataBase Reference)
• NIST Chemistry Reference: {Fe₂Au₂(CO)8(C₂H₄(P(C₆H₅)2)2)}(134132-21-1)
• EPA Substance Registry System: {Fe₂Au₂(CO)8(C₂H₄(P(C₆H₅)2)2)}(134132-21-1)

Safety Data

• Hazardous Substances Data: 134132-21-1(Hazardous Substances Data)

Upstream product

• 18024-34-5 1,2-bis(diphenylphosphino)ethane digold(I) dichloride 

Downstream Products

• 134132-24-4 (NEt4)2{(Fe2Au(CO)6(μ-CO)2)2(μ-1,2-bis(diphenylphosphino)ethane)} 

Relevant articles and documents

Square Fe2Au2 and triangular Fe2Au Clusters: A reversible transformation. X-ray crystal structure of [Fe2Au2(CO)8(μ-dppm)] (dppm = bis(diphenylphosphino)methane)

The salt (NEt4)2[Fe2(CO)8] reacts with (ClAu)2(μ-L) (L = bis(diphenylphosphino)methane (dppm), 1,2-bis(diphenylphosphino)ethane (dppe), 1,3-bis(diphenylphosphino)propane (dppp)) in tetrahydrofuran to yield [Fe2Au2(CO)8(μ-L)] (L = dppm, 2a; L = dppe, 2b; L = dppp, 2c). The structure of 2a has been determined by X-ray diffraction methods. Crystals are monoclinic, space group P21/n, with Z = 4 in a unit cell of dimensions a = 16.405 (5) A?, b = 17.031 (8) A?, c = 12.410 (4) A? and β = 95.64 (2)°. The structure has been solved from diffractometer data by direct and Fourier methods and refined by full-matrix least squares on the basis of 3640 observed reflections to R and Rw values of 0.0291 and 0.0318, respectively. The metal core consists of an unprecedented, nearly square tetrametallic Fe2Au2 framework with Au-Au = 2.915 (1) A?, Au-Fe = 2.527 (2) and 2.534 (2) A?, and Fe-Fe = 2.900 (2) A? distances. 2a does not react with an excess of (NEt4[Fe2(CO)8], but 2b,c add another [Fe2(CO)8]2- fragment to give the hexametallic complexes (NEt4)2[{Fe2Au(CO)6(μ-CO) 2}2(μ-L)] (L = dppe, 3b; L = dppp, 3c), which are postulated to be formed by two Fe2Au units joined by an L ligand. Furthermore, 3b,c react reversibly with 1 equiv of (ClAu)2(μ-L) to again afford 2b,c, respectively. An extended Hu?ckel molecular orbital study of the bonding capabilities of two forms of [Fe2(CO)8]2- has been carried out. Formation of terminal Fe-Au bonds is found to be only compatible with the unbridged form of [Fe2(CO)8]2-, whereas the formation of a triangular Fe2Au cluster is most favorable for the bridged form of the iron-carbonyl fragment. Several alternative semibridging interactions between carbonyls and Au atoms in [Fe2Au2(CO)8(μ-dppm)] are analyzed, and the structure with only one cis-equatorial carbonyl bent toward each Au atom is found to be the most stable one.