二正丁基锡（IV）基羧酸酯的谱学表征

SPECTRAL CHARACTERIZATION OF Di-n-butyltin（IV）CARBOXYLATES

合成了１０个二正丁基锡（ＩＶ）基羧酸酯化合物｛［￣ｎＢｕ＿２Ｓｎ（Ｏ＿２ＣＲ）］＿２Ｏ｝＿２（Ａ１～Ａ５）和￣ｎＢｕ＿２Ｓｎ（Ｏ＿２ＣＲ）＿２（Ｂ１～Ｂ５）（Ｒ＝１：ＣＣｌ＿３；２：ＣＨＣｌ＿２；３：ＣＨ＿２Ｃｌ；４：ＰｈＣＨ＝ＣＨ；５：２，２，３，３－四甲基环丙基），其中Ａ４、Ａ５和Ｂ５为新化合物，对它们进行了元素分析和ＩＲ及、￣１Ｈ、￣（１３）Ｃ、￣（１１９）ＳｎＮＭＲ谱表征，重点讨论了￣（１３）Ｃ和￣（１１９）ＳｎＮＭＲ谱的谱学特征及化学位移值与母体酸的ＰＫａ值大小的关系，并在此基础上推测了它们分子结构。

Ten di-n-butyltin（IV）carboxylates｛［~nBu_2Sn（O_2CR）］_2O｝_2（A1～A5）and ~nBu_2Sn（O_2CR）_2（B1～B5）（R＝1：CCl_3；2：CHCl_2；3：CH_2Cl；4：PhCH＝CH；5：2，2，3，3-tetramethylcyclopropyl） were synthesized． Compounds A4、 A5 and B5 are first re-ported． All compounds were characterized by elemental analysis， IR，~1H，^(13)C and ^(119)SnNMR spectra. The spectral featurcs of ^(13)C and ^(119)Sn NMR spectra and the relationbetween δ（^(13)C or ^(119)Sn）valucs and PKa valucs of the parent acids were disscussedin detail． On this basis， the molecular structures of these compounds were inferred.