کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1336556 | 1500232 | 2016 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Study of a novel hepta-coordinated FeIII bimetallic complex with an unusual 1,2,4,5-tetrazine-ring opening Study of a novel hepta-coordinated FeIII bimetallic complex with an unusual 1,2,4,5-tetrazine-ring opening](/preview/png/1336556.png)
Reaction of Fe(NO3)3 with 3,6-di(pyrimidin-2-yl)-1,2,4,5-tetrazine (BPymTz) in acetonitrile gives a hepta-coordinated FeIII complex (1) with the bridging unit 1,2-diiminohydrazido (1,2-dih2−: −HNC(R) NNC(R)NH−) generated in situ from the tetrazine ring-opening of BPymTz. DFT calculations, X-ray diffraction studies and SQUID magnetometry measurements were successfully performed on 1. The crystallography measurement confirms the ring-opening and the substituent’s contribution to the rare pentagonal bipyramidal coordination geometry of the metal ions. Magnetic susceptibility measurements on 1 reveal an S = 0 ground state, arising from the antiferromagnetic interaction between the two FeIII centers (J = −3.02 cm−1) within the molecule.
A new FeIII complex, [FeIII2(1,2-dih2−)(NO3)2(H2O)4](NO3)2 was prepared by reaction of BPymTz with FeNO3·9H2O. The formation of a new bridging ligand, generated in situ from the tetrazine ring opening of BPymTz, was observed. DFT calculations, X-ray diffraction studies and SQUID magnetometry measurements were performed on the FeIII complex.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 108, 29 March 2016, Pages 163–168