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RSS FeedsMolecules, Vol. 25, Pages 855: First Cobalt(II) Spin Crossover Compound with N4S2-Donorset (Molecules)

 
 

14 february 2020 19:03:18

 
Molecules, Vol. 25, Pages 855: First Cobalt(II) Spin Crossover Compound with N4S2-Donorset (Molecules)
 


Herein we report the synthesis and characterization of a novel bis-tridentate 1,3,4-thiadiazole ligand (L = 2,5-bis[(2-pyridylmethyl)thio]methyl-1,3,4-thiadiazole). Two new mononuclear complexes of the type [MII(L)2](ClO4)2 (with M = FeII (C1) and CoII (C2)) have been synthesized, containing the new ligand (L). In both complexes the metal centers are coordinated by an N4S2-donorset and each of the two ligands is donating to the metal ion with just one of the tridentate pockets. The iron(II) complex (C1) is in the low spin [LS] state below room temperature and shows an increase in the magnetic moment only above 300 K. In contrast, the cobalt(II) complex (C2) shows a gradual spin crossover (SCO) with T1/2 = 175 K. To our knowledge, this is the first cobalt(II) SCO complex with an N4S2-coordination.


 
22 viewsCategory: Biochemistry, Chemistry, Molecular Biology
 
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