Abstract
The syntheses and structural characterization of three new monodimensional azido-bridged manganese(II) complexes with empirical formulas [Mn(N3)2(aminopyz)2]n (1), [Mn(N3)2(4-azpy)2]n (2) and [Mn(N3)2(4-Bzpy)2]n (3) (pyz = pyrazine (1,4-diazine), 4-azpy = 4-azidopyridine and 4-Bzpy = 4-benzoylpyridine) are reported. 1 Is a monodimensional compd. with double EO azido bridges, 2 is an alternating monodimensional compd. with double end-on and double end-to-end azido bridges in the sequence di-EO-di-EE and 3 is a monodimensional compd. with double end-on and double end-to-end azido bridges in the sequence di-EO-di-EO-diEO-di-EO-di-EE. The magnetic properties of 1-3 are reported. Periodic DFT calcns. were performed to est. the J values and quantum Monte Carlo simulations were carried out using the calcd. J values to check their accuracy in comparison with the exptl. magnetic measurements. From this theor. anal., two appealing features of the di-EO Mn(II) compds. can be extd.: first, the exchange coupling becomes more ferromagnetic when the Mn-N-Mn bridging angle becomes larger and the spin d. of the bridging nitrogen atoms has an opposite sign to that of the Mn(II) centers. [on SciFinder(R)]
Original language | English |
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Pages (from-to) | 18632-18642 |
Number of pages | 11 |
Journal | Dalton Transactions |
Volume | 44 |
Issue number | 42 |
DOIs | |
Publication status | Published - 2015 |