Magnetic Properties of Mixed Ligand Ni^II₂ and Ni^II₄ Complexes Composed of Macrocyclic Hexaamine‐Dithiophenolato and Bridging Tetrazolato Ligands

Abstract

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 -2 -interdimer coupling occurs in this compound. The synthesis and crystal structure of the new complex 7·2MeCN is also reported.

Preparation and Characterization of Dinuclear Nickel(II) Complexes Containing N3Ni(μ1, 3‐SO3R)2(μ‐RCN4)NiN3 Cores: Crystal Structures and Magnetic Properties

“…In the IR spectra of 4-6 the most prominent features are the strong absorption bands at ca. 1200 cm -1 , which are attributable to the S-O 3 -groups in 4-6 are also in a μ 1,3 -bridging mode. [7,8] UV/Vis spectroscopic data of 4-6 were recorded from 190-1600 nm in acetonitrile solution at room temperature with a Jasco V-670 UV/Vis/NIR spectrophotometer.…”

“…[4] The phenylsulfonato complexes in 4-6 lack this transition, in agreement with the conversion of the soft thiolate to hard sulfonate groups. As a consequence, the spin-allowed 3 …”

“…The temperature dependencies of the molar magnetic susceptibility (per dinuclear complex) of the complexes 4-6 and their parent complexes 1-3 [3] in the form of χ M T vs. T plots. The full lines represent the best theoretical fits to Equation (1).…”

“…[2][3][4][5] The complexes are distinguished by the bowl-shaped binding cavity that confers some unusual properties on the complexes. [6] We have also investigated the coordination chemistry of the hexaaza-disulfonate ligand H 2 L2, but to a lesser extent.…”

A Novel N(3),N(4)‐Bridging Coordination Mode of 1‐R‐Tetrazole‐5‐thiolates – Synthesis, X‐ray Diffraction, Magnetic Properties and Quantum‐Chemical Study of a Macrocyclic Dinickel Complex Coligated by 1‐Methyltetrazole‐5‐thiolate

“…Similar behaviour has also been observed for complexes 3. [17] The magnitude of the interaction was determined by least-squares fitting of the experimental magnetic susceptibility data to the spin Hamiltonian [Equation (1)] [18] over the temperature range of 2-330 K by using a full-matrix diagonalisation approach. Isotropic Heisenberg-Dirac-van Vleck exchange, the single zero-field splitting and the single-ion Zeeman interactions were taken into account.…”