【摘要】 <正> 三唑醇（Triadimenol）是一种优良内吸性的广谱杀菌剂,用于处理各类作物种子时,防病效果显著。该化合物的分子式为C₁₄H₁₈N₃OCl,化学结构式如右。其中含有两个手性碳原子,应其有四种光学异构体。据文献报导,其中的两个非对映体之间的药效有明显的差别,有效体称为A体。A体的二个对映体之间的药效以（-）-A体为最佳有效体。鉴于了解A体的一对对映体的构型,对探讨其生物活性的作用机理及共与立体构型关系方面有重要意更多还原

【Abstract】 The crystal of （+）-A Triadimenol （baytan） belongs to monoclinic system with space group C₂²-P2₁ and cell parameters a= 10.543（1） , b= 8.202（1）, c= 9.778（1）, β=113.048（7）°. There are two molecules in each unit cell, Z=2. The X-ray diffraction data were collected on PW-1100 four-circle diffractometer, with CuKa radition.The number of independent diffraction data amounts to 1610, of which 1524 are observable reflections. The crystal structure has been determined by direct method （RANTAN） and refined by full-matrix least-square method to R=0.065. The absolute configuration has been assigned by direct mea- surement of 18 enantiomer sensitive Bijvoet reflection pairs. X-ray structure analysis shows that absolute configuration of（+）-A triadimenol is 1R.2S, the triazole ring has an aromatic property.更多还原