کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1334770 | 979453 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Thermal properties and crystal structures of manganese(III)-salen complexes with the Tf2N anion [Tf2N = bis(trifluoromethanesulfonyl)amide)] Thermal properties and crystal structures of manganese(III)-salen complexes with the Tf2N anion [Tf2N = bis(trifluoromethanesulfonyl)amide)]](/preview/png/1334770.png)
A series of salts comprising cationic manganese(III)-salen complexes and the Tf2N anion has been prepared (salen = N,N′-bis(salicylideneaminato)ethylene, Tf2N = bis(trifluoromethanesulfonyl)amide) to investigate the effects of axial ligands and substituents on their thermal properties. [Mn(salen)L2][Tf2N] (L = H2O, pyridine) and their 5-butoxysalen analogs undergo thermal desorption of the axial ligands, followed by decomposition above 250 °C. The pyridine complexes exhibit two-step ligand desorption, corresponding to the formation of a dimer and later, desorption from the dimer. Complexes with L = 3-butylpyridine and N-butylimidazole melt at 97.6 and 132.7 °C, respectively, before ligand desorption. Crystal structures of these and related complexes have been determined. [Mn(salen)(3,3′-bipyridine)][Tf2N] is a coordination polymer with higher thermal stability.
A series of salts comprising cationic manganese(III)–salen complexes and the Tf2N anion have been prepared. [Mn(salen)L2][Tf2N] (L = H2O, Pyridine) and their 5–butoxysalen analogues undergo thermal desorption of the axial ligands, followed by decomposition. The pyridine complexes exhibit two-step ligand desorption. Complexes with L = 3-butylpyridine and N-butylimidazole melt near 100 °C or above, before ligand desorption. Crystal structures of these and related salts have been determined.Figure optionsDownload as PowerPoint slideHighlights
► Manganese(III)-salen salts with Tf2N prepared and crystallographically characterized.
► [Mn(salen)L2][Tf2N] with alkylated axial ligands (L) melted near 100 °C or above.
► Thermal behaviors of the salts strongly depended on the axial ligands.
Journal: Polyhedron - Volume 43, Issue 1, 13 August 2012, Pages 153–158