In:
Chemistry – A European Journal, Wiley, Vol. 24, No. 20 ( 2018-04-06), p. 5191-5203
Abstract:
A series of novel iron(III) complexes of the general formula [Fe(L)X] (where L is a dianion of pentadentate Schiff base ligand N , N ′‐bis({2‐hydroxy‐3,5‐dimethylphenyl}phenyl)methylidene‐1,6‐diamino‐3‐azapentane=H 2 L1 for 1 and 2 ; N , N ′‐bis({2‐hydroxy‐3‐ethoxyphenyl}methylidene)‐1,6‐diamino‐3‐azapentane=H 2 L2 for 3 and 3⋅C 3 H 6 O ) and X is terminal pseudohalido ligand (X=N 3 for 1 , X=NCS for 2, and X=NCSe for 3 and 3⋅C 3 H 6 O ) were synthesized and thoroughly characterized. Magnetic measurements revealed the above room temperature spin crossover for isomorphic complexes 1 and 2 ( T 1/2 =441 K and T 1/2 =435 K, respectively), whereas the solvent‐free complex 3 showed a half complete spin crossover ( T 1/2 =250 K), which was detected by variable temperature crystallography as well. On the other hand, solvated complex 3⋅C 3 H 6 O exhibited permanent high spin state behaviour and either recrystallization or in situ thermal desolvation converts 3⋅C 3 H 6 O to solvent‐free and spin‐crossover‐active form 3 . Magnetic properties of all the reported complexes were also supported by EPR spectroscopy experiments and in addition, DFT and ab initio calculations were employed for the evaluation of the g ‐factor and zero field splitting parameters.
Type of Medium:
Online Resource
ISSN:
0947-6539
,
1521-3765
DOI:
10.1002/chem.201704546
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
1478547-X
Permalink