(2,2-diphenyl-3-trimethylsilyl-1,3-dihydro-2-benzostannol-1-yl)-trimethylsilane | 141291-55-6

• 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: (2,2-diphenyl-3-trimethylsilyl-1,3-dihydro-2-benzostannol-1-yl)-trimethylsilane
• CAS: 141291-55-6
• 化学式: C₂₆H₃₄Si₂Sn
• 分子量: 521.437
• InChiKey: FPOYOHIOTMGDNC-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  5.96
• 重原子数：
  29.0
• 可旋转键数：
  4.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  0.0
• 氢给体数：
  0.0
• 氢受体数：
  0.0

反应信息

• 作为产物：
  描述：

  、 二苯基二氯化锡 以 乙醚 为溶剂， 以62%的产率得到(2,2-diphenyl-3-trimethylsilyl-1,3-dihydro-2-benzostannol-1-yl)-trimethylsilane
  参考文献：
  名称：

  Chemistry of o-xylenediyl–metal complexes. Part 5. Silicon and tin metallacycles derived from o-C₆H₄(C̅HR)₂(R = H or SiMe₃)

  摘要：

  Treatment of SnCl2Ph2 with [Mg(LL)(thf)] 6 or [Li(tmen)]2[o-C6H4{CH(SiMe3)}2] 7 in OEt2 yields the stannacycle [activated Sn(LL)Ph2] 1 or [activated Sn(L'L'-meso)Ph2] 2 {(LL)2- = o-C6H4(CH2BAR)2, (L'L')2- = o-C6H4[CHBAR(SiMe3)]2, thf = tetrahydrofuran, tmen = Me2N[CH2]2NMe2}. Likewise, SnCl4 with 6 or 7 at 30-degrees-C in OEt2 affords exclusively the stannaspirobicycle [activated Sn(LL)2] 3 or [activated Sn(L'L'-meso)2] 4; by contrast SnCl4 with 7 at -78-degrees-C gives, together with 4 (52%), the yellow, diamagnetic tin(II) metallacycle [{activated Sn(L'L'-meso)}4](Sn-Sn) 5 (14%). Compound 5 is more conveniently prepared by treating Sn(OC6H2But2-2,6-Me-4)2 with 7; it is tetrameric in the solid and in solution, but monomeric in the gas phase and has a low first ionisation energy (7.6 eV). The compound [activated Si(LL)Me2] 8 is obtained by an in situ Grignard reaction from SiCl2Me2, o-C6H4(CH2Cl)2 and Mg in thf, while [activated Si(L'L'-meso)Me2] 9 is prepared from SiCl2Me2 and 7. Each of the metallacycles derived from the ligand (L'L')2- was obtained stereospecifically as the meso diastereoisomer. X-Ray structure determinations of complexes 1-5 have been performed. The alpha,alpha'-unsubstituted metallacycles have shorter distances (2.14(4) in 1, 2.14(7) angstrom in 3) than the corresponding alpha,alpha'-bis(trimethylsilyl) derivatives (2.16(6) in 2, 2.17(4) angstrom in 4). The C6C(alpha)C(alpha') o-xylenediyl plane is folded relative to the MC(alpha)C(alpha') plane, the 'fold angle' theta being 8.5 (1), 19.8 (2), 0.8 and 11.9 (3), 24.1 and 23.0 (4) and 20.8-degrees (5). The larger theta values for the activated Sn(IV)(L'L') complexes 2 and 4 than for the their activated Sn(IV)(LL) counterparts 1 and 3 (as for comparable Sn-C(alpha) distances) is attributable to greater interligand strain and crowding around the metal centre in 2 and 4. Molecules of 5 have 4BAR symmetry, with Sn-Sn 2.852(3), Sn-C(alpha) 2.15(3) and Sn-C(alpha') 2.09(4) angstrom.

  DOI：

  10.1039/dt9920000775

文献信息

• Chemistry of o-xylenediyl–metal complexes. Part 5. Silicon and tin metallacycles derived from o-C₆H₄(C̅HR)₂(R = H or SiMe₃)
  作者：Michael F. Lappert、Wing-Por Leung、Colin L. Raston、Brian W. Skelton、Allan H. White

  DOI：10.1039/dt9920000775

  日期：——

  Treatment of SnCl2Ph2 with [Mg(LL)(thf)] 6 or [Li(tmen)]2[o-C6H4CH(SiMe3)}2] 7 in OEt2 yields the stannacycle [activated Sn(LL)Ph2] 1 or [activated Sn(L'L'-meso)Ph2] 2 (LL)2- = o-C6H4(CH2BAR)2, (L'L')2- = o-C6H4[CHBAR(SiMe3)]2, thf = tetrahydrofuran, tmen = Me2N[CH2]2NMe2}. Likewise, SnCl4 with 6 or 7 at 30-degrees-C in OEt2 affords exclusively the stannaspirobicycle [activated Sn(LL)2] 3 or [activated Sn(L'L'-meso)2] 4; by contrast SnCl4 with 7 at -78-degrees-C gives, together with 4 (52%), the yellow, diamagnetic tin(II) metallacycle [activated Sn(L'L'-meso)}4](Sn-Sn) 5 (14%). Compound 5 is more conveniently prepared by treating Sn(OC6H2But2-2,6-Me-4)2 with 7; it is tetrameric in the solid and in solution, but monomeric in the gas phase and has a low first ionisation energy (7.6 eV). The compound [activated Si(LL)Me2] 8 is obtained by an in situ Grignard reaction from SiCl2Me2, o-C6H4(CH2Cl)2 and Mg in thf, while [activated Si(L'L'-meso)Me2] 9 is prepared from SiCl2Me2 and 7. Each of the metallacycles derived from the ligand (L'L')2- was obtained stereospecifically as the meso diastereoisomer. X-Ray structure determinations of complexes 1-5 have been performed. The alpha,alpha'-unsubstituted metallacycles have shorter distances (2.14(4) in 1, 2.14(7) angstrom in 3) than the corresponding alpha,alpha'-bis(trimethylsilyl) derivatives (2.16(6) in 2, 2.17(4) angstrom in 4). The C6C(alpha)C(alpha') o-xylenediyl plane is folded relative to the MC(alpha)C(alpha') plane, the 'fold angle' theta being 8.5 (1), 19.8 (2), 0.8 and 11.9 (3), 24.1 and 23.0 (4) and 20.8-degrees (5). The larger theta values for the activated Sn(IV)(L'L') complexes 2 and 4 than for the their activated Sn(IV)(LL) counterparts 1 and 3 (as for comparable Sn-C(alpha) distances) is attributable to greater interligand strain and crowding around the metal centre in 2 and 4. Molecules of 5 have 4BAR symmetry, with Sn-Sn 2.852(3), Sn-C(alpha) 2.15(3) and Sn-C(alpha') 2.09(4) angstrom.