Abstract
The structural, electronic, magnetic and theoretical study of the complex [Co3(HL)2(μ‐AcO)2(AcO)2], 1, (HL is the dianion obtained by deprotonation of N,N’‐bis(salicylidene)‐2‐hydroxy‐1,3‐propanediamine and AcO is acetate) shows that 1 crystallizes with two independent molecules in the asymmetric unit. Each molecule is a trinuclear complex. Both molecules have similar geometry, and correspond to a spin system based on trapped mixed valences on six‐coordinate metal centres, CoIII(s=0)‐CoII(s=3/2)‐CoIII(s=0). The rigid framework formed by the tetradentate Salen‐type ligands HL and the syn‐syn bridging acetate anions is a characteristic feature observed in other related complexes. However, the here reported compound is the first one in this family having Z’>1. UV‐Vis spectrum shows a broad band in the visible region where d‐d transition for ions CoIII and CoII are. EPR spectra and the electronic energy estimations of the ground state show the presence of two conformers s=3/2. The χMT product at 300 K is 3.24 emu mol−1K per trinuclear unit, this product is expected for CoII where the contribution of orbital angular moment is taken into account (3.38 emu mol−1K for L=3).
Original language | English |
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Pages (from-to) | 6866-6871 |
Journal | ChemistrySelect |
Volume | 1 |
Issue number | 21 |
Early online date | 23 Dec 2016 |
DOIs | |
Publication status | Published - 23 Dec 2016 |
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CCDC 1497349: Experimental Crystal Structure Determination
Baca-Solis, E. (Creator), Bernes, S. (Creator), Vazquez-Lima, H. (Creator), Boulon, M.-E. (Creator), Winpenny, R. (Creator) & Reyes-Ortega, Y. (Creator), Cambridge Crystallographic Data Centre, 2 Aug 2016
DOI: 10.5517/ccdc.csd.cc1m83ll
Dataset