Abstract
Three iron(III) complexes, [FeIII(Him)2(n-MeOhapen)]PF6 (1: n = 4, 2: n = 5, 3: n = 6), where Him = imidazole and n-MeOhapen = N,N′-bis(n-methoxy-2-oxyacetophenylidene)ethylenediamine, were synthesized. Each FeIII ion was coordinated by N4O2 donor atoms of equatorial n-MeOhapen and two axial Him. The saturated FeC2N2 chelate ring involving the ethylenediamine moiety adopted a gauche conformation and the two phenylidene planes of [FeIII(Him)2(n-MeOhapen)]+ were oriented opposite to the FeO2N2 coordination plane. Two adjacent [FeIII(Him)2(4-MeOhapen)]+ cations in 1 were connected via PF6- ions by hydrogen bonds between the imidazole group and PF6- to give a one-dimensional chain. Two adjacent cations in 2 were connected via hydrogen bonds between the phenylidene oxygen and imidazole atoms to form a cyclic dimer structure. Two EtOH molecules were involved in a hydrogen-bonded cyclic dimer structure in 3. Compounds 1 and 2 showed spin crossover behavior, but 3 showed incomplete spin crossover.
Original language | English |
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Pages (from-to) | 89-95 |
Number of pages | 7 |
Journal | Inorganica Chimica Acta |
Volume | 432 |
DOIs | |
Publication status | Published - Jun 1 2015 |
Keywords
- Assembly structures
- Hydrogen bonds
- Imidazole
- Iron(III) complex
- NO Schiff-base ligand
- Spin equilibrium
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry