Related Products of 13940-83-5. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Nickel(ii)fluoridetetrahydrate, is researched, Molecular F2H8NiO4, CAS is 13940-83-5, about Influence of HF2- geometry on magnetic interactions elucidated from polymorphs of the metal-organic framework [Ni(HF2)(pyz)2]PF6 (pyz = pyrazine). Author is Manson, Jamie L.; Carreiro, Kimberly E.; Lapidus, Saul H.; Stephens, Peter W.; Goddard, Paul A.; Del Sesto, Rico E.; Bendix, Jesper; Ghannadzadeh, Saman; Franke, Isabel; Singleton, John; Lancaster, Tom; Moeller, Johannes S.; Baker, Peter J.; Pratt, Francis L.; Blundell, Stephen J.; Kang, Jinhee; Lee, Changhoon; Whangbo, Myung-Hwan.
A tetragonal polymorph of [Ni(HF2)(pyz)2]PF6 (designated β) is isomorphic to its SbF6-congener at 295 K and features linear Ni-FHF-Ni pillars. Enhancements in the spin exchange (JFHF = 7.7 K), Neel temperature (TN = 7 K), and critical field (Bc = 24 T) were found relative to monoclinic α-PF6. DFT reveals that the HF2- bridges are significantly better mediators of magnetic exchange than pyz (Jpyz), where JFHF ≈ 3Jpyz, thus leading to quasi-1D behavior. Spin d. resides on all atoms of the HF2- bridge whereas N-donor atoms of the pyz ring bear most of the d.
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Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider