Pt((R)-(+)-2,2'-bis(diphenylphosphino)-1,1'-binaphtyl)Br2 | 162588-45-6

• 英文名称: Pt((R)-(+)-2,2'-bis(diphenylphosphino)-1,1'-binaphtyl)Br2
• CAS: 162588-45-6
• 化学式: C₄₄H₃₂Br₂P₂Pt
• 分子量: 977.574
• InChiKey: LPCKZQKPMYJKAO-UHFFFAOYSA-L

计算性质

• 辛醇/水分配系数(LogP)：
  None
• 重原子数：
  None
• 可旋转键数：
  None
• 环数：
  None
• sp3杂化的碳原子比例：
  None
• 拓扑面积：
  None
• 氢给体数：
  None
• 氢受体数：
  None

反应信息

• 作为产物：
  描述：

  Pt((R)-(+)-2,2'-bis(diphenylphosphino)-1,1'-binaphtyl)(o-C6H4-OMe)2 、 氢溴酸 以 四氢呋喃 、 甲醇 为溶剂， 生成 Pt((R)-(+)-2,2'-bis(diphenylphosphino)-1,1'-binaphtyl)Br2 、 Pt((R)-(+)-2,2'-bis(diphenylphosphino)-1,1'-binaphtyl)(Br)(o-C6H4-OMe)
  参考文献：
  名称：

  手性二膦的铂-芳基配合物中金属-芳基键的受限旋转

  摘要：

  Square-planar bromo aryl, iodo aryl, and diaryl platinum(II) diphosphine complexes were prepared from the corresponding Pt(0) ethene complex by direct reaction with the haloarene, or from the Pt(II) dichloride complex by reaction with 2 equiv of aryllithium. These complexes exhibit restricted rotation about the metal-aryl bond in different ways. The diastereotopic pair of ortho hydrogens of the arylplatinum moiety in (DIOP)Pt(3,5-dibromophenyl)(I) (3) were sharp and distinct in the H-1 NMR spectrum below ambient temperature. (DIOP)Pt(2-methoxyphenyl)(I) (6) exists as two distinct diastereomers discernable in the ambient-temperature 1H NMR spectrum. The bis(a-methoxyphenyl) complexes behaved similarly, since three distinct diastereomers were observed in solution for both the DIOP and BINAP complexes 11 and 13 (but not for the CHIRAPHOS complex 12). Only the BINAP complex 13 is dynamic on the NMR time scale at ambient temperature. The X-ray structure of complex 13 in one stereoisomeric anti form is reported: Monoclinic, space group C2, unit cell dimensions a = 36.08(5) Angstrom, b = 12.12(1) Angstrom, c = 12.45(2) Angstrom, beta = 104.5(1)degrees, Z = 4. The structure was refined to an R value of 0.063 (R(w) = 0.087) for 3011 observed reflections. Examination of the corresponding DPPF complex 15 indicates separate syn and anti diastereomers. In the course of the synthetic work, significant differences between the reactivity of the ligands was encountered, and trends in rotation barriers with changing complex structure are discussed.

  DOI：

  10.1021/om00003a021