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 p p 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.

Synthesis, crystal structure, solid state electronic spectra and thermal study of three cobalt(II)-selenocyanate complexes: In situ room temperature transformation of 4,4′-dipyridyldisulfide to 4,4′-dipyridylsulfide

ZANGRANDO, ENNIO
2014

Abstract

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 p p 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.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/2837153
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 9
social impact