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- W2324978030 endingPage "2388" @default.
- W2324978030 startingPage "2380" @default.
- W2324978030 abstract "The preparation, spectroscopic characterization, and X-ray crystal structure of two novel one-dimensional compounds of formula [MII(tppz)(NCS)(μ-1,3-NCS)]n [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine and M = Co(1) and Ni (2)] are reported. 1 and 2 are isomorphous compounds, and they crystallize in the P21/n space group. Their structures are made up of zigzag chains of cobalt(II) (1) and nickel(II) ions (2) bridged by single end-to-end thiocyanate groups with a tridentate tppz molecule and a terminally bound thiocyanate-N ligand achieving distorted MN5S octahedral surroundings around each metal center. The main source of the distortion of the ideal octahedron is due to the geometrical constraints issued from the occurrence of two fused five-member chelate rings of the tridentate tppz ligand, the values of the N–M–N bond angles covering the range 75.58(9)–78.66(9)°. The M–N bond lengths vary in the range 2.025(3)–2.116(29 (1) and 2.001(2)–2.079(2) Å (2), and they are shorter than the M–S bond distance [2.6395(10) (1) and 2.5225(9) Å (2)]. The values of the intrachain metal–metal separation are 6.4197(7) (1) and 6.3257(5) Å (2). The magnetic properties of 1 and 2 have been investigated in the temperature range 1.9–300 K. Both compounds exhibit intrachain ferromagnetic interactions with values of the magnetic coupling (J) of +4.60 (1) and +7.82 cm–1 (2) [the spin Hamiltonian being defined as Ĥ = −JΣi = 1n–1ŜiŜi+1]." @default.
- W2324978030 created "2016-06-24" @default.
- W2324978030 creator A5011381513 @default.
- W2324978030 creator A5041910204 @default.
- W2324978030 creator A5062788863 @default.
- W2324978030 creator A5067919471 @default.
- W2324978030 date "2015-03-25" @default.
- W2324978030 modified "2023-10-17" @default.
- W2324978030 title "Ferromagnetic Coupling Through the End-to-End Thiocyanate Bridge in Cobalt(II) and Nickel(II) Chains" @default.
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- W2324978030 doi "https://doi.org/10.1021/acs.cgd.5b00176" @default.
- W2324978030 hasPublicationYear "2015" @default.
- W2324978030 type Work @default.