[(methyl)2Pt(μ-2,5-bis(1-phenyliminoethyl)pyrazine)Pt(methyl)2] | 211487-77-3

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: [(methyl)2Pt(μ-2,5-bis(1-phenyliminoethyl)pyrazine)Pt(methyl)2]
• CAS: 211487-77-3
• 化学式: C₂₄H₃₀N₄Pt₂
• 分子量: 764.689
• InChiKey: MEXALTMLPXNPQM-ALTLVHLHSA-N

反应信息

• 作为产物：
  描述：

  bis[dimethyl(μ-dimethylsulfide)platinum(II)] 、 2,5-bis(1-phenyliminoethyl)pyrazine 以 乙醚 、 苯 为溶剂， 以66%的产率得到[(methyl)2Pt(μ-2,5-bis(1-phenyliminoethyl)pyrazine)Pt(methyl)2]
  参考文献：
  名称：

  On the Question of Mixed-Valent States in Ligand-Bridged Dinuclear Organoplatinum Compounds [R_kPt(μ-L)PtR_k]ⁿ, k = 2 or 4

  摘要：

  Symmetrically dinuclear complexes between the bis-bidentate bridging ligands mu-L (mu-L = 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine (bptz) or 2,5-bis( 1-phenyliminoethyl)pyrazine (bpip)) and the organoplatinum fragments PtMes(2) (Mes = mesityl), PtMe(2), or PtMe(4) were synthesized as deeply colored compounds. Low-energy charge-transfer transitions from metal d orbitals (Pt(II)) or metal-carbon sigma bond combinations (Pt(IV)) to low-lying pi* orbitals of the pi acceptor ligands are responsible for long-wavelength absorption maxima lambda(max) (CT) > 700 nm. UV/Vis and EPR spectroelectrochemical results for reversible reduction processes indicate the formation of [Pt(IV)](2)(mu-L(.-)) and [Pt(II)](2)(mu-L(.-)) species, however, the latter exhibit a significant metal contribution according to a Pt(II)/Pt(I) formulation Cyclic voltammetry reveals that the remarkable system [Mes(2)Pt(mu-bptz)PtMes(2)](n) forms an enormously stabilized radical anion (n = 1-) with Delta E(1/2) = 1250 V and K(c) = 10(21.2) and a Pt(III)/Pt(II) mixed-valent state (n = 1+) with Delta E(1/2) = 80 mV and K(c) = 23. This small K(c) value is attributed to the predominantly d(sigma) orbital character of the redox orbitals on the Pt(II) centers.

  DOI：

  10.1021/om980107j