La(η(3)-C3H5)3(tetramethylethylenediamine) | 182205-18-1

• 英文名称: La(η(3)-C3H5)3(tetramethylethylenediamine)
• 英文别名: La(η(3)-C3H5)(tetramethylethylendiamin)
• CAS: 182205-18-1
• 化学式: C₁₅H₃₁LaN₂
• 分子量: 378.33
• InChiKey: NWCHHVUYCQRQSJ-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  四甲基乙二胺 、 La(η(3)-C3H5)3 * 1.5 dioxane 以 further solvent(s) 为溶剂， 以95%的产率得到La(η(3)-C3H5)3(tetramethylethylenediamine)
  参考文献：
  名称：

  Komplexkatalyse LI. Komplexe des Tris(allyl)lanthans mit verschiedenen Donorliganden La(η3-C3H5)3 · L (L:DME, TMED, 2HMPT) und ihre katalytischen Eigenschaften in der stereospezifischen Butadienpolymerisation

  摘要：

  The dimeric tris(allyl)lanthanum dioxane complex [La(eta(3)-C3H5)(3) .(C4H8O2)(1.5)](2) 1 can be transformed by reaction with other donor ligands in monomeric complexes of the type [La(eta(3)-C3H5)(3) . L] (L:DME = dimethylethyleneglycolether (2), TMED = tetramethylethylenediamine (3) and 2HMPT = hexamethylphosphorictriamide (4)). The complexes were characterized by elemental analysis, H-1, C-13 and La-139 NMR spectroscopy. Single crystal X-ray structure analysis of 3 gave the formula [La(eta(3)-C3H5)(3) (eta(2)-Me2NC2H4NMe2)] in the monoclinic space group P2(1)/n with cell parameters a = 8.124(4) Angstrom, b = 14.458(6) Angstrom c = 15.233(7) Angstrom and beta = 94.14(2)degrees. The complexes catalyze polymerization of butadiene in toluene at 50 degrees C with high 1,4-trans selectivity. The catalytic activity decreases accordingly to 1 approximate to 2 > 3 much greater than 4 depending on the bond strength of the ligands. With addition of methylaluminoxane (MAO) the catalytic activity increases correspondingly and a 1,4-cis selectivity of 40-60% is obtained.

  DOI：

  10.1016/s0022-328x(97)00406-3