| Autor: |
Chiu, Cheng-Chang, Cheng, Ming-Chuan, Lin, Sheng-Hsiang, Yan, Cheng-Wei, Lee, Gene-Hsiang, Chang, Mu-Chieh, Lin, Tien-Sung, Peng, Shie-Ming |
| Předmět: |
|
| Zdroj: |
Dalton Transactions: An International Journal of Inorganic Chemistry; 5/28/2020, Vol. 49 Issue 20, p6635-6643, 9p |
| Abstrakt: |
We report the synthesis of a novel heteroheptanuclear metal string complex (HMSC) [Ni3Ru2Ni2(μ7-teptra)4(NCS)2](PF6) 1 supported by tetra-pyridyl-tri-amine (H3teptra) ligands. We employed X-ray diffraction and other spectroscopic techniques to characterize the complex. The observed remarkably short Ru–Ru distance of 2.2499(3) Å for 1 is indicative of a unique metal–metal interaction in the mixed-valence [Ru2]5+ (S = 3/2) unit. The complex exhibits a relatively high magnetic moment value of 4.55 B.M. at 4 K, which increases rapidly to 6.00 B.M. at 30 K and remains at 6.11 B.M. from 50 to 300 K as shown by SQUID measurements, indicating a high spin (S ≥ 3/2) system which is further supported by the analyses of EPR spectra at low temperatures. These magnetic behaviors can be ascribed to the result of spin-exchange interactions among multi-spin centers. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
