Strong Ferromagnetic Exchange Coupling Mediated by
a Bridging Tetrazine Radical
in a Dinuclear Nickel Complex

Woods, Toby J.; Stout, Heather D.; Dolinar, Brian S.; Vignesh, Kuduva R.; Ballesteros-Rivas, Maria F.; Achim, Catalina; Dunbar, Kim R.

doi:10.1021/acs.inorgchem.7b01812.s001

ic7b01812_si_001.pdf (2.11 MB)

Strong Ferromagnetic Exchange Coupling Mediated by a Bridging Tetrazine Radical in a Dinuclear Nickel Complex

journal contribution

posted on 2017-09-25, 13:05 authored by Toby J. Woods, Heather D. Stout, Brian S. Dolinar, Kuduva R. Vignesh, Maria F. Ballesteros-Rivas, Catalina Achim, Kim R. Dunbar

The radical bridged compound [(Ni(TPMA))₂-μ-bmtz^•–](BF₄)₃·3CH₃CN (bmtz = 3,6-bis(2′-pyrimidyl)-1,2,4,5-tetrazine, TPMA = tris(2-pyridylmethyl)amine) exhibits strong ferromagnetic exchange between the S = 1 Ni^II centers and the bridging S = 1/2 bmtz radical with J = 96 ± 5 cm^–1 (−2J_Ni‑radS_NiS_rad). DFT calculations support the existence of strong ferromagnetic exchange.