Abstract
The ligand N,N′-tetra(4-antipyrylmethyl)-1,2-diaminoethane (TAMEN) coordinates to two Co(II) ions and forms the tetrahedral homodinuclear complex [Co2(TAMEN)Cl4]. In methanol, the complex shows a weak absorbtion spectrum with a maximum at 515±0.5 nm and a molar absorbtivity of 40.0±1.0 l ċ mol−1 cdot; cm−1. Variable temperature spectra (282 to 323 K) show no changes of this band and suggest the absence of thermochromicity. The magnetic moments amount to 4.93 to 5.00 μB at the temperature range of 232 to 329 K, demonstrating the complex to be spin-free in methanol.
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