di-μ-chlorotetrakis[1-(dimethylamino)-3,5-dimehtylboratabenzene]discandium | 254753-08-7

• 英文名称: di-μ-chlorotetrakis[1-(dimethylamino)-3,5-dimehtylboratabenzene]discandium
• CAS: 254753-08-7
• 化学式: C₃₆H₆₀B₄Cl₂N₄Sc₂
• 分子量: 752.961
• InChiKey: YSVASKWUNIEYRV-UHFFFAOYSA-L

反应信息

• 作为产物：
  描述：

  lithium 1-(dimethylamino)-3,5-dimethylboratabenzene 、 氯化钪 以 甲苯 为溶剂， 以76%的产率得到di-μ-chlorotetrakis[1-(dimethylamino)-3,5-dimehtylboratabenzene]discandium
  参考文献：
  名称：

  Borabenzene Derivatives. 29. Synthesis and Structural Diversity of Bis(boratabenzene)scandium Complexes. Structures of [ScCl(C₅H₅BMe)₂]₂, [ScCl(3,5-Me₂C₅H₃BNMe₂)₂]₂, and ScCl[3,5-Me₂C₅H₃BN(SiMe₃)₂]₂¹

  摘要：

  The bis(boratabenzene)scandium complexes 3-5 are synthesized from solvent-free lithium boratabenzenes and ScCl3 in toluene (110 degrees C, 3 days). Complex [ScCl(C5H5BMe)(2)](2) (3) possesses a doubly chloro-bridged dinuclear structure with four facially coordinated boratabenzene ligands. Compound [ScCl(3,5-Me2C5H3BNMe2)(2)](2) (4) differs from 3 in that each scandium atom binds to one boratabenzene in an unprecedented N-B-C-2 coordination mode and facially to the second boratabenzene ligand; in solution 4 is fluxional, displaying only one type of boratabenzene ligand with effective lateral symmetry. Complex ScCl[3,5-Me2C5H3BN(SiMe3)(2)](2) (5) is mononuclear because of the bulkiness of its boratabenzene. Metalation of the 1,2,3,6-tetrahydroborinine 3-CH2-5-MeC5H5BNMe2 (9) affords the solvent-free boratabenzene Li(3,5-Me2C5H3BNMe2) (7). The mixture of 1,2- and 1,4-dihydroborines 3,5-Me2C5H4BNMe2 (10a,b) (accessible from 9 by isomerization) can be transformed into the solvent-free boratabenzene Li[3,5-Me2C5H3BN(SiMe3)(2)] (8) by (i) treatment with BCl3 to give the chloro derivatives 11a,b, (ii) subsequent amination with NH(SiMe3)(2)/NEt3, and (iii) metalation with LiN(SiMe3)(2).

  DOI：

  10.1021/om990548i