118933-36-1

Upstream product

• 129096-93-1 {P(CH₂CH₂P(C₆H₅)2)3FeH}⁽¹⁺⁾*BF₄^(1-)={P(CH₂CH₂P(C₆H₅)2)3FeH}BF₄ 
• 23582-03-8 tris(2-diphenylphosphinoethyl)phosphine 
• 143-66-8 sodium tetraphenyl borate 

Downstream Products

• 141317-01-3 {FeH(η2-H2)(P(CH2CH2PPh2)3)}BPh4 
• 193815-13-3 Fe(P(CH₂CH₂P(C₆H₅)2)3)Cl 
• 54477-77-9 {COFeH(P(CH₂CH₂P(C₆H₅)2)3)}⁽¹⁺⁾*B(C₆H₅)4^(1-)={COFeH(P(CH₂CH₂P(C₆H₅)2)3)}B(C₆H₅)4 

Relevant academic research and scientific papers

Anodically-induced metal deprotonation of the hydrido complexes [{PCH2CH2PPh2)3}M(H)Cl] (M = Fe, Ru, Os): The first step to the electrogeneration of Fe(I), Ru(I) and Os(I) five-coordinate complexes

The electrochemical behaviour of the (hydride)chloride complexes [(PP3)M(H)Cl] (M = Fe, Ru, Os) has been studied by cyclic voltammetry and controlled-potential electrolysis in tetrahydrofuran (PP3 = P(CH2CH2PPh2)3). All compounds undergo anodically-induced deprotonation to give the corresponding M(II) chlorides [(PP3)MCl]+. All the oxidation processes correspond to an EEC reaction pathway. The two-electron oxidation processes occur at coincident potentials for M = Ru, at slightly different potentials for M = Os, and at largely different potentials for M = Fe. The M(II) complexes [(PP3)MCl]+ are reversibly reduced to the corresponding M(I) derivatives [(PP3)MCl], which can be generated in solution by exhaustive macroelectrolysis. The paramagnetic Fe(I), Ru(I) and Os(I) chloride complexes have been characterised by X-band ESR spectroscopy in glassy and fluid solutions.

Electrochemistry as a diagnostic tool to discriminate between classical M-(H)2 and nonclassical M-(H2) structures within a family of dihydride and dihydrogen metal complexes

The redox properties of a family of dihydride and dihydrogen complexes of iron, cobalt, rhodium, and iridium have been studied in detail and compared with those of the corresponding monohydrido derivatives. All of the complexes contain as stabilizing coligands either P(CH2CH2PPh2)3 (PP3) or N(CH2CH2PPh2)3 (NP3). The novel dihydride [(PP3)Fe(H)2] and its isotopomers [(PP3)Fe(H)(D)] and [(PP3)Fe(D)2] have been fully characterized by IR and 1H and 31P NMR techniques. The complexes [(PP3)Co(H2)]PF6 and [(PP3)Rh(H2)]BF4, which exhibit the nonclassical dihydrogen structure, undergo in tetrahydrofuran irreversible one-electron oxidation. As a result, the deprotonation of the H2 ligand occurs and the starting η2-H2 compounds are converted to the corresponding monohydrides [(PP3)MH]+ (M = Co, Rh). In contrast, the classical dihydrides [(L)Ir(H)2]BPh4 (L = PP3, NP3) and [(NP3)Rh(H)2]BPh4 show no redox activity within the potential window of tetrahydrofuran. The dihydride [(PP3)Fe(H)2)] can be oxidized to give the unstable species [(PP3)Fe(H)2]+ and [(PP3)Fe(H)2]2+, but no deprotonation reaction occurs. The cis-(hydride)(dihydrogen) complex [(PP3)Fe(H)(H2)]BPh4 undergoes one-electron reduction in tetrahydrofuran to give the neutral dihydride. Rare examples of paramagnetic monohydrides of cobalt(II), rhodium(II), iron(I), and iron(II) have been synthesized chemically or electrochemically and characterized by X-band ESR spectroscopy.