Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1312231 | Inorganica Chimica Acta | 2014 | 8 Pages |
•Co(II)–SeCN complexes using N-donor ligand have been synthesized and characterized.•Room temperature conversion of 4,4′-bipyridyldisulfide to 4,4′-bipyridylsulfide.•All the complexes form supramolecular structure through weak interactions.•Solid state electronic, IR spectral and thermal results have been discussed.
Three new supramolecular networks of cobalt(II), [Co(phen)2(SeCN)2] (1), [Co(bpe)2(SeCN)2]n (2), and {[Co(bps)2(SeCN)2]·H2O}n (3) [phen = 1,10-phenanthroline; bpe = 1,2-bis(4-pyridyl)ethane; bps = 4,4-bipyridylsulfide] have been synthesized and characterized by X-ray single crystal structure determination, solid state electronic spectroscopy and thermogravimetric analysis. Complex 1 is a neutral discrete cobalt(II) complex with cis located selenocyanate anions and forms 2D supramolecular layers through π−π interactions. Complexes 2 and 3 have a comparable structure based on metal center bridged by two bpe or bps ligands trough pyridinyl N-donor to give rise to a linear chain. The selenocyanate anions (SeCN−) bind the metal centers through nitrogen and occupy trans axial positions of the octahedral metal coordination environment. These pendant pseudohalides located on both sides of the 1D polymeric chain help to reinforce the packing through weak interactions. Solid state electronic spectra of all the complexes corroborate the presence of octahedral high spin cobalt(II) centers in all complexes.
Graphical abstractThree coordination complexes of Co(II) with selenocyanide (SeCN−) and N-donor neutral ligands have been synthesized and characterized by X-ray single crystal structure determination. All the complexes form supramolecular structure through weak interactions. Solid state electronic spectra corroborate the presence of high spin octahedral Co(II) centers in complexes. The selenocyanide moieties help to reinforce the packing through hydrogen bonding.Figure optionsDownload full-size imageDownload as PowerPoint slide