作者:Philipp Kratzer、Bastian Ramming、Steven Römisch、Gerhard Maas
DOI:10.1039/c5ce00365b
日期:——
The solid-state structures of six 3-iodopropiolamides (IâCCâCOâNR2; NR2 = pyrrolidino, 2,5-dihydro-1H-pyrrolo, piperidino, morpholino, methylamino, amino) have been determined by XRD analysis. All but the parent 3-iodopropiolamide exhibit very short intermolecular iodineâoxygen contacts (2.754(2)â2.858(5) Ã
) leading to one-dimensional polymeric chains in the solid state. The shape of these chains and the packing arrangement depend on the size and ring conformation in the cases of cyclic tertiary amides (NR2). In the structure of 3-iodopropiol-N-methylamide, Iâ¯O halogen bonds and NâHâ¯O hydrogen bonds generate a two-dimensional, non-planar infinite network, while the crystal structure of 3-iodopropiolamide acetonitrile solvate is determined by a network of hydrogen bonds involving the CONH2 moiety; the iodine atom, on the other hand, is coordinated to an acetonitrile molecule through a short Iâ¯N contact.
六种 3-碘丙酰胺 (I–CC–CO–NR2; NR2 = 吡咯烷基、2,5-二氢-1H-吡咯并、哌啶基、吗啉代、甲氨基、氨基) 的固态结构已通过 XRD 分析确定。除母体 3-碘丙酰胺外,所有这些都表现出非常短的分子间碘-氧接触 (2.754(2)→2.858(5)→),从而形成固态的一维聚合物链。在环状叔酰胺 (NR2) 的情况下,这些链的形状和堆积排列取决于尺寸和环构象。 3-碘丙醇-N-甲基酰胺的结构中,I–O卤键和N–H–O氢键生成二维非平面无限网络,而3-碘丙醇酰胺乙腈溶剂化物的晶体结构由涉及 CONH2 部分的氢键网络决定;另一方面,碘原子通过短的 I−N 接触与乙腈分子配位。