| Autor: |
Yuan, Juan, Liu, Mei-Jiao, Liu, Cai-Ming, Kou, Hui-Zhong |
| Předmět: |
|
| Zdroj: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 12/21/2017, Vol. 46 Issue 47, p16562-16569, 8p |
| Abstrakt: |
Four new mononuclear Fe(iii) complexes 1–4 of 2-methyl-6-(pyrimidin-2-yl-hydrazonomethyl)-phenol (H2L) have been synthesized and characterized by magnetic susceptibility measurements and single-crystal X-ray diffraction analysis. Complexes 1–3 are ionic compounds with the formula [Fe(HL)2]X·nsolvent (X = ClO4− (1), BF4− (2) and Cl− (3)), while complex 4 ([Fe(HL)(L)]) is neutral. The central Fe(iii) ion in complexes 1–4 is coordinated by four nitrogen and two oxygen atoms of two Schiff base ligands HL− or L2−, and the coordination geometries of FeIII are all distorted octahedral. Magnetic measurements indicate that complex 1 shows an abrupt spin transition with a thermal hysteresis of 32 K (T1/2↓ = 158 K and T1/2↑ = 190 K), and complex 4 exhibits a gradual incomplete spin transition. Complexes 2 and 3 are high spin with a room-temperature χmT value of 4.32 cm3 K mol−1 and 4.39 cm3 K mol−1, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
