The reaction of 2-(RNCH)C6H4MgBr [R = 2â²,4â²,6â²-Me3C6H2 (R1), 2â²,6â²-iPr2C6H3 (R2)] [prepared from 2-(R1NCH)C6H4Br (1) or 2-(R2NCH)C6H4Br (2) and Mg] with SbCl3 in a 2â:â1 and 1â:â1 molar ratio followed by treatment with an aqueous KBr solution gave [2-(R1NCH)C6H4]2SbBr (3) and [2-(R2NCH)C6H4]2SbBr (4) as well as [2-(R1NCH)C6H4]SbBr2 (6) and [2-(R2NCH)C6H4]SbBr2 (7). Treatment of 4 with Na2S·9H2O provided the dinuclear [2-(R2NCH)C6H4}2Sb]2S (5). Heterocyclic species, i.e. the oxide cyclo-[2-(R2NCH)C6H4}SbO]3 (8) and the sulfides cyclo-[2-(R1NCH)C6H4}SbS]2 (9) and cyclo-[2-(R2NCH)C6H4}SbS]2 (10), were obtained by reacting dibromides 6 and 7 with KOH and Na2S·9H2O, respectively, in a waterâtoluene solvent mixture. The sulfide 10 reacted with [W(CO)5(thf)] to yield the heterometallic complex cyclo-[2-(R2NCH)C6H4}SbS]2[W(CO)5] (11). The compounds were characterised by multinuclear NMR spectroscopy in solution, mass spectrometry and IR spectroscopy in the solid state. The molecular structures of 4, 5, 6·CHCl3, 7, 9·CH2Cl2, 10 and 11·0.25CH3OH were established by single-crystal X-ray diffraction. Theoretical calculations using DFT methods were carried out on bromide 7 and the geometrical isomers of its dimer association as well as the geometrical isomers of sulfide 10 and its monomer.
2-(R1NCH) MgBr [R = 2â²,4â²,6â²-Me3C6H2(R1),2â²,6â²-iPr2C6H3(R2)] [由 2-(R1NCH)
C6H4Br (1) 或 2-(R2NCH) (2) 和 Mg 制备] 与 SbCl3 以 2â:1和1â:â1的摩尔比,然后用KBr
水溶液处理,得到[2-(R1NCH) ]2SbBr (3)和[2-(R2NCH) ]2SbBr (4),以及[2-(R1NCH) ]SbBr2 (6)和[2-(R2NCH) ]SbBr2 (7)。用
Na2SÂ-9H2O 处理 4 得到了双核 [2-(R2NCH)
C6H4}2Sb]2S (5)。将二
溴化物 6 和 7 分别与 KOH 和 Â-9H2O 在
水甲苯混合溶剂中反应,可得到杂环物种,即氧化物环-[2-(R2NCH) }SbO]3 (8)和
硫化物环-[2-(R1NCH) }SbS]2 (9) 和环-[2-(R2NCH) }SbS]2 (10)。
硫化物 10 与[W(CO)5(thf)]反应生成杂
金属配合物环-[2-(R2NCH) }SbS]2[W(CO)5](11)。这些化合物的特征通过溶液中的多核核磁共振光谱、质谱和固态红外光谱进行了表征。单晶 X 射线衍射确定了 4、5、6Â-
CHCl3、7、9Â-
CH2Cl2、10 和 11Â-0.25CH3OH 的分子结构。利用 DFT 方法对
溴化物 7 及其二聚体的几何异构体以及
硫化物 10 及其单体的几何异构体进行了理论计算。