COA of Formula: C3F9FeO9S3. 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: Iron(III) trifluoromethanesulfonate, is researched, Molecular C3F9FeO9S3, CAS is 63295-48-7, about Asymmetric tetranuclear nickel chains with unidirectionally ordered 2-(α-(5-phenyl)pyridylamino)-1,8-naphthyridine ligands. Author is Tsou, Lien-Hung; Sigrist, Marc; Chiang, Ming-Hsi; Horng, Er-Chien; Chen, Chun-hsien; Huang, Shou-Ling; Lee, Gene-Hsiang; Peng, Shie-Ming.
The new ligand, 2-(α-(5-phenyl)pyridylamino)-1,8-naphthyridine (Hphpyany), was synthesized by a Pd(0)-catalyzed reaction of 2-chloro-1,8-naphthyridine with 2-amino-5-phenylpyridine in the presence of potassium tert-butoxide. Linear tetranickel metal complexes, [Ni4(phpyany)4Cl2](CF3SO3) 1, [Ni4(phpyany)4Cl2](BF4)2 2, [Ni4(phpyany)4(NCS)2](ClO4) 3 and [Ni4(phpyany)4(NCS)2](CF3SO3)2 4 were prepared and crystallog. characterized. Complexes 1-4 demonstrate that, for the first time, four asym. ligands align unidirectionally and thus configure (4,0)-form tetranickel strings, specifically, with the Ph groups of the four phpyany- pointing to one side of the Ni4 chain and naphthyridyl to the other. The remarkably short Ni-Ni distances (∼2.33 Å) for 1 and 3 indicate partial metal-metal bonding, which can be viewed as both complexes containing one mixed-valence Ni23+ unit. The measurements of the magnetic susceptibility reveal that Ni47+ complexes 1 and 3 exhibit antiferromagnetic interactions (J = -42 cm-1 for 1 and -46 cm-1 for 3) between the terminal Ni2+ ion and the Ni23+ unit, while Ni48+ complexes 2 and 4 exhibit antiferromagnetic interactions (J = -33 cm-1 for 2 and -35 cm-1 for 4) between the two terminal Ni2+ ions. The results of the cyclic voltammetry indicate two reversible redox couples at E1/2(1) = 0.12 V, E1/2(2) = -0.65 V for 1, and at E1/2(1) = 0.12 V, E1/2(2) = -0.72 V for 3. The products of the first oxidation for 1 and 3 are the oxidized dication species 2 and 4, resp. The values of single-mol. resistance (15.4 (±3.46) MΩ for 3 and 16.2 (±5.04) MΩ for 4) were determined by STM-based break-junction methods. The results represent the first conductance measurements of linear tetranickel chains.
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Piperidine – Wikipedia,
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