79972-38-6

Basic information

• Product Name: Ni(1,2-bis(diphenylphosphino)ethane)2⁽¹⁺⁾
• CAS NO: 79972-38-6
• Molecular Weight: 855.538
• Mol File: 79972-38-6.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: Ni(1,2-bis(diphenylphosphino)ethane)2⁽¹⁺⁾(CAS DataBase Reference)
• NIST Chemistry Reference: Ni(1,2-bis(diphenylphosphino)ethane)2⁽¹⁺⁾(79972-38-6)
• EPA Substance Registry System: Ni(1,2-bis(diphenylphosphino)ethane)2⁽¹⁺⁾(79972-38-6)

Safety Data

• Hazardous Substances Data: 79972-38-6(Hazardous Substances Data)

Upstream product

• 102-54-5 ferrocene 
• 47895-41-0 {Nickel(II)-(1,2-bis(diphenylphosphino)ethane)2}⁽²⁺⁾ 

Downstream Products

• 12125-80-3 ferrocenium 
• 15628-25-8 Ni⁽⁰⁾(1,2-bis(diphenylphosphino)ethane)2 

Relevant articles and documents

Relative hydride, proton, and hydrogen atom transfer abilities of [HM(diphosphine)2]PF6 complexes (M = Pt, Ni)

A series of [M(diphosphine)2]X2, [HM(diphosphine)2]X, and M(diphosphine)2 complexes have been prepared for the purpose of determining the relative thermodynamic hydricities of the [HM(diphosphine)2]X complexes (M = Ni, Pt; X = BF4, PF6; diphosphine = bis(diphenylphosphino)ethane (dppe), bis(diethylphosphino)ethane (depe), bis(dimethylphosphino)ethane (dmpe), bis(dimethylphosphino)propane (dmpp)). Measurements of the half-wave potentials (E1/2) for the M(II) and M(0) complexes and pKa measurements for the metal hydride complexes have been used in a thermochemical cycle to obtain quantitative thermodynamic information on the relative hydride donor abilities of the metal - hydride complexes. The hydride donor strengths vary by 23 kcal/mol and are influenced by the metal, the ligand substituents, and the size of the chelate bite of the diphosphine ligand. The best hydride donor of the complexes prepared is [HPt(dmpe)2](PF6), a third-row transition metal with basic substituents and a diphosphine ligand with a small chelate bite. The best hydride acceptors have the opposite characteristics. X-ray diffraction studies were carried out on eight complexes: [Ni(dmpe)2](BF4)2, [Ni(depe)2](BF4)2, [Ni(dmpp)2](BF4)2, [Pt(dmpp)2](PF6)2, [Ni(dmpe)2(CH3CN)](BF4)2, [Ni(dmpp)2(CH3CN)](BF4)2, Ni(dmpp)2, and Pt(dmpp)2. The cations [Ni(dmpp)2]2+ and [Pt(dmpp)2]2+ exhibit significant tetrahedral distortions from a square-planar geometry arising from the larger chelate bite of dmpp compared to that of dmpe. This tetrahedral distortion produces a decrease in the energy of the lowest unoccupied molecular orbital of the [M(dmpp)2]2+ complexes, stabilizes the +1 oxidation state, and makes the [HM(dmpp)2]+ complexes poorer hydride donors than their dmpe analogues. Another interesting structural feature is the shortening of the M-P bond upon reduction from M(II) to M(0).