tris((tri-tert-butylsilyl)oxy)molybdenum(IV) hydride | 1041477-64-8

• 分子结构分类: 有机化合物 - 有机金属化合物 - 有机类金属化合物
• 英文名称: tris((tri-tert-butylsilyl)oxy)molybdenum(IV) hydride
• CAS: 1041477-64-8
• 化学式: C₃₆H₈₂MoO₃Si₃
• 分子量: 743.242
• InChiKey: SSANCPCJSQIJJF-UHFFFAOYSA-N

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

• 作为反应物：
  描述：

  乙烯 、 tris((tri-tert-butylsilyl)oxy)molybdenum(IV) hydride 以 苯 为溶剂， 以85%的产率得到
  参考文献：
  名称：

  Molybdenum and Tungsten Structural Differences are Dependent on nd_z²/(n + 1)s Mixing: Comparisons of (silox)₃MX/R (M = Mo, W; silox = ^tBu₃SiO)

  摘要：

  Treatment of trans-(Et2O)(2)MoCl4 with 2 or 3 equiv of Na(silox) (i.e., (NaOSiBu3)-Bu-t) afforded (Silox)(3)MoCl2 (1-Mo) or (silox)(3)MoCl (2-Mo). Purification of 2-Mo was accomplished via addition of PMe3 to precipitate (Silox)(3)CIMoPMe3 (2-MoPMe3), followed by thermolysis to remove phosphine. Use of MoCl3(THF)(3) with various amounts of Na(silox) produced (Silox)(2)ClMoMoCl(Silox)(2) (3-Mo). Alkylation of 2-Mo with MeMgBr or EtMgBr afforded (Silox)(3)MoR (R = Me, 2-MoMe; Et, 2-MoEt). 2-MoEt was also synthesized from C2H4 and (Silox)(3)MoH, which was prepared from 2-Mo and NaBEt3H. Thermolysis of WCl6 with (HOSiBu3)-Bu-t afforded (Silox)(2)WCl4 (4-W), and sequential treatment of 4-W with Na/Hg and Na(silox) provided (Silox)(3)WCl2 (1-W, tbp, X-ray), which was alternatively prepared from trans-(Et2S)(2) WCl4 and 3 equiv of Tl(silox). Na/Hg reduction of 1-W generated (silox)(3)WCl (2-W). Alkylation of 2-W with MeMgBr produced (Silox)(3)WMe (2-WMe), which dehydrogenated to (Silox)(3)WCH (6-W) with Delta H-double dagger = 14.9(9) kcal/ mol and Delta S-double dagger = -26(2) eu. Magnetism and structural studies revealed that 2-Mo and 2-MoEt have triplet ground states (GS) and distorted trigonal monopyramid (tmp) and tmp structures, respectively. In contrast, 2-W and 2-WMe possess squashed-T-d (distorted square planar) structures, and the former has a singlet GS. Quantum mechanics/ molecular mechanics studies of the S = 0 and S = 1 states for full models of 2-Mo, 2-MoEt, 2-W and 2-WMe corroborate the experimental findings and are consistent with the greater nd(z)(2)/(n + 1)s mixing in the third-row transition-metal species being the dominant feature in determining the structural disparity between molybdenum and tungsten.

  DOI：

  10.1021/ic800139c
• 作为产物：
  描述：

  Na(silox) 以 乙醚 、 甲苯 为溶剂， 生成 tris((tri-tert-butylsilyl)oxy)molybdenum(IV) hydride
  参考文献：
  名称：

  Molybdenum and Tungsten Structural Differences are Dependent on nd_z²/(n + 1)s Mixing: Comparisons of (silox)₃MX/R (M = Mo, W; silox = ^tBu₃SiO)

  摘要：

  Treatment of trans-(Et2O)(2)MoCl4 with 2 or 3 equiv of Na(silox) (i.e., (NaOSiBu3)-Bu-t) afforded (Silox)(3)MoCl2 (1-Mo) or (silox)(3)MoCl (2-Mo). Purification of 2-Mo was accomplished via addition of PMe3 to precipitate (Silox)(3)CIMoPMe3 (2-MoPMe3), followed by thermolysis to remove phosphine. Use of MoCl3(THF)(3) with various amounts of Na(silox) produced (Silox)(2)ClMoMoCl(Silox)(2) (3-Mo). Alkylation of 2-Mo with MeMgBr or EtMgBr afforded (Silox)(3)MoR (R = Me, 2-MoMe; Et, 2-MoEt). 2-MoEt was also synthesized from C2H4 and (Silox)(3)MoH, which was prepared from 2-Mo and NaBEt3H. Thermolysis of WCl6 with (HOSiBu3)-Bu-t afforded (Silox)(2)WCl4 (4-W), and sequential treatment of 4-W with Na/Hg and Na(silox) provided (Silox)(3)WCl2 (1-W, tbp, X-ray), which was alternatively prepared from trans-(Et2S)(2) WCl4 and 3 equiv of Tl(silox). Na/Hg reduction of 1-W generated (silox)(3)WCl (2-W). Alkylation of 2-W with MeMgBr produced (Silox)(3)WMe (2-WMe), which dehydrogenated to (Silox)(3)WCH (6-W) with Delta H-double dagger = 14.9(9) kcal/ mol and Delta S-double dagger = -26(2) eu. Magnetism and structural studies revealed that 2-Mo and 2-MoEt have triplet ground states (GS) and distorted trigonal monopyramid (tmp) and tmp structures, respectively. In contrast, 2-W and 2-WMe possess squashed-T-d (distorted square planar) structures, and the former has a singlet GS. Quantum mechanics/ molecular mechanics studies of the S = 0 and S = 1 states for full models of 2-Mo, 2-MoEt, 2-W and 2-WMe corroborate the experimental findings and are consistent with the greater nd(z)(2)/(n + 1)s mixing in the third-row transition-metal species being the dominant feature in determining the structural disparity between molybdenum and tungsten.

  DOI：

  10.1021/ic800139c