Structural Characteristics of Aryloxybismuthanes Stabilized by Hypervalent Bond Formation. Synthesis, Incorporation of 4-Methoxyphenol through Hydrogen Bonding, and Crystal Supramolecularity
作者:Toshihiro Murafuji、Masahiro Nagasue、Yoshihiro Tashiro、Yoshikazu Sugihara、Nagao Azuma
DOI:10.1021/om9908534
日期:2000.3.1
to form 10-(4-methoxyphenoxy)phenothiabismine 5,5-dioxide·4-methoxyphenol 1:1 complex (3) through hydrogen bonding between the OH group of 4-methoxyphenol and the aryloxide oxygen atom of 2c. Such complex formation may be the initial step of the substitution reactions. Comparison of the X-ray crystal structures of 2b, 2c, and 3 shows that these bismuthanes adopt various association modes, which might
合成并充分表征了10-Phenoxyphenothiabismine 5,5-dioxide(2a)和相关的化合物2b,c(其气态的芳氧基铋硫醚的铋-氧键未结合到环系统中)的第一个实例,并对其进行了充分表征。溶液中的苯酚将OAr基团置换为2个化合物显示出两种取代趋势。由于2-甲氧基氧原子与10-(2-甲氧基苯氧基)吩噻二胺5,5-二氧化物中的铋原子的分子内配位作用,优先进行2-甲氧基苯酚的取代(2b)。此外,用更多的酸性酚进行的取代更有利,这与在高价化合物中在顶端位置观察到的亲脂性相符。发现10-(4-甲氧基苯氧基)吩噻二胺5,5-二氧化物(2c)通过OH之间的氢键形成10-(4-甲氧基苯氧基)吩噻二胺5,5-二氧化物·4-甲氧基苯酚1:1络合物(3) 4-甲氧基苯酚的基团和2c的芳氧基氧原子。这种复合物的形成可能是取代反应的起始步骤。2b,2c和3的X射线晶体结构比较 结果表明,这些双变