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Synthesis, structures and characterization of complexes containing a 2,6-bis(guanidinyl)pyridine ligand on iron(II), cobalt(II), nickel(II), copper(I), copper(II) and zinc(II)
In this work the bis(guanidinyl)pyridine ligand tbo2Pyr is synthesized and its coordination chemistry with a series of late first-row ions is explored. These complexes have various geometries with the tbo2Pyr ligand exhibiting both meridional (planar) and facial (puckered) coordination modes. [Displ...
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Published in: | Polyhedron 2018-11, Vol.155, p.77-84 |
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Main Authors: | , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | In this work the bis(guanidinyl)pyridine ligand tbo2Pyr is synthesized and its coordination chemistry with a series of late first-row ions is explored. These complexes have various geometries with the tbo2Pyr ligand exhibiting both meridional (planar) and facial (puckered) coordination modes.
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A new chelating guanidine ligand, 2,6-bis(tbo)pyridine (1, tbo = 1,4,6-triazabicyclooctene), was synthesized from Htbo and 2,6-dibromopyridine and its coordination chemistry with mid- and late-first-row transition metal ions (Fe2+, Co2+, Ni2+, Cu+, Cu2+ and Zn2+) was explored. The complexes [1-Fe(OTf)(MeCN)]OTf, [1-Co(OTf)(MeCN)]OTf, [1-Ni(MeCN)3](OTf)2, [1-Cu]OTf, [1-Cu(OTf)(MeCN)]OTf, and [1-Zn(OTf)2] were structurally characterized by X-ray diffraction. Across this series, 1 exhibits both facial and meridional coordination modes depending on metal ion size. The metal complexes were additionally characterized spectroscopically and electrochemically, revealing 1 as a weaker donor than several related guanidine-containing chelates. |
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ISSN: | 0277-5387 |
DOI: | 10.1016/j.poly.2018.08.012 |