在通式为ArM [(OBR)2 O]的杂硼恶烷的反应中,观察到芳基从硼到Sb和Bi的空前转移[其中M = Sb,Bi; Ar = C 6 H 3 -2,6-(CH 2 NMe 2)2;R = Ph,4-CF 3 C 6 H 4,4 -BrC 6 H 4 ]和相应的硼酸RB(OH)2。使用此程序,获得离子对[ArMR] + [R 4 B 5 O 6 ] - [其中M = Sb和R = Ph(4),4-CF 3C 6 H 4(5),4-BrC 6 H 4(6);其中M = Bi且R = Ph(7),4-CF 3 C 6 H 4(8),4-BrC 6 H 4(9)]。使用元素分析,电喷雾电离质谱和多核NMR光谱对所有化合物进行表征,并通过单晶X射线衍射分析确定4和7的分子结构。4 – 9中的中心金属原子分别由硼酸芳基化,据我们所知,硼酸代表15组较重元素的化学反应中前所未有的反应路径。对这种转变
Synthesis and Structural Characterization of Heteroboroxines with MB2O3 Core (M = Sb, Bi, Sn)
摘要:
Reaction of organoantimony and organobismuth oxides (LSbO)(2) and (LBiO)(2) (where L is [2,6-bis(dimethylarnino)methyl]phenyl) with four equivalents of the organoboronic acids gave new heteroboroxines LM[(OBR)(2)O] 1a-2c (for M = Sb: R = Ph (1a), 4-CF3C6H4 (1b), ferrocenyl (1c); for M = Bi: R = Ph (2a), 4-CF3C6H4 (2b), and ferrocenyl (2c)). Analogously, reaction between organotin carbonate L(Ph)Sn(CO3) and two equivalents of organoboronic acids yielded compounds L(Ph)Sn[(OBR)(2)O] (where R = Ph (3a), 4-CF3C6H4 (3b), and ferrocenyl (3c)). All compounds were characterized by elemental analysis and NMR spectroscopy. Their structure was described both in solution (NMR studies) and in the solid state (X-ray diffraction analyses 1a, 1c, 2b, 3b, and 3c). All compounds contain a central MB2O3 core (M = Sb, Bi, Sn), and the bonding situation within these rings and their potential aromaticity was investigated by the help of computational methods.