Add time:07/17/2019         Source:sciencedirect.com

Some new compounds of 6,7-dimethyl-2,3-di(2-pyridyl)quinoxaline with cobalt(II), nickel(II), copper(II) and zinc(II) have been prepared in toluene. The cobalt and zinc compounds have tetrahedral structures while the nickel and copper complexes have octahedral structures. The thermal behaviour of these compounds has been studied by thermogravimetry and differential thermal analysis. Each compound is highly stable and decomposes, without formation of any intermediate compounds, to the metal oxide. The room temperature conductivities of the prepared compounds are all in the range 3.4 × 10−8 Ω−1 m−1 to 2.2 × 10−7 Ω−1 m−1. Evidence is advanced from current-voltage data and, more especially, from attenuated total reflectance spectra taken during application of an electric field, that the compounds undergo significant field-induced distortion that remains after removal of the field.

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