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First example of antimoniated Schiff bases: Hypervalent Sb <- N(sp2) bonds

机译:锑化席夫碱的第一个例子:超价Sb <-N(sp2)键

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The first example of antimoniated Schiff bases viz.1-[2-(bis-{2-[(1-R-p-tolylethylimino)methyl]phenyl}stibanyl)benz-E-ilidene]-(1-R-p-tolylethyl)amine (1) and tris[(R)-2-benzyliden-2-yl-amino)butan-l-ol]stibine (2) containing imino groups at the ortho position of aryl ring have been synthesized and characterized.The compounds were obtained by the reaction of tris(o-formylphenyl)stibine with R-4-dimethyl benzyl amine or (R)-2-aminobutan-1-ol,respectively.These chiral antimony based Schiff bases were characterized by IR,mass,1H,13C,NMR spectroscopy.The X-ray crystal structures of these two Schiff bases show hypervalent interactions between antimony and sp2 nitrogen atoms.Additionally compound 2 shows intramolecular Sb-O interaction also giving eight-coordination of antimony,both of these observations are uncommon in literature.These two compounds 1 and 2 show helicoidal chirality,which is a very new concept in antimony chemistry.
机译:锑化席夫碱的第一个实例,即1- [2-(双-{2-[(1--Rp-甲苯基亚乙基亚氨基)甲基]苯基]苯乙烯基)苯并-E-噻吩基]-(1-Rp-甲苯基乙基)胺( 1)合成并表征了在芳基环邻位含有亚氨基的tris [(R)-2-亚苄基-2-基-氨基)丁烷-1-醇] stibine(2)。三(邻甲酰基苯基)二苯乙烯与R-4-二甲基苄胺或(R)-2-氨基丁-1-醇的反应。这些手性锑基席夫碱的结构为IR,质量,1H,13C,核磁共振波谱学。这两个席夫碱的X射线晶体结构显示锑与sp2氮原子之间存在高价相互作用。另外,化合物2显示出分子内Sb-O相互作用也使锑具有八配位,这在文献中并不常见。这两种化合物1和2显示出螺旋手性,这是锑化学中一个非常新的概念。

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