کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1311738 | 975348 | 2006 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Crystal structures and catalytic activities of Zn(II) compounds containing 1,3-bis(4-pyridyl)propane Crystal structures and catalytic activities of Zn(II) compounds containing 1,3-bis(4-pyridyl)propane](/preview/png/1311738.png)
The structures of new compounds containing Zn(II) ions and bpp (1,3-bis(4-pyridyl)propane) ligands have been determined. The coordinating halides (Br− or Cl−) produce one-dimensional compounds 6 and 7, and intra- and inter-chain CH⋯X (X = Br or I) interactions play roles for building crystal structures with the flexible bpp ligands. The non-coordinating PF6− anions do not produce hydroxyl bridged zinc cations or polymeric compounds, and produce only a monomeric complex 4 containing four bpp ligands and two water ligands. Previously reported polymeric compounds 1 and 2 containing hydroxyl-bridged zinc cations [Zn2OH] were found to carry out the catalytic transesterification of a range of esters with methanol at room temperature under the mild conditions, whereas the rest of compounds did not catalyze the transesterification reactions at all. In addition, the catalysts 1 and 2 have shown even better catalytic activity than zinc salts Zn(NO3)2 and Zn(OTf)2.
The structures of new compounds containing Zn(II) ions and bpp ligands have been determined. The polymeric compounds 1 and 2 containing hydroxyl-bridged zinc cations [Zn2OH] were found to carry out the catalytic transesterification of a range of esters with methanol at room temperature under the mild conditions.Figure optionsDownload as PowerPoint slide
Journal: Inorganica Chimica Acta - Volume 359, Issue 8, 15 May 2006, Pages 2534–2542