1,4-Diaryl-2,3-dimethyl-1,4-diazabutadiene tin tetrachloride complexes 1 · SnCl4 and 2 · SnCl4 have been prepared and characterized by thermal properties, IR and Raman spectroscopy and mass spectrometry. A study on their behaviour in solvents with different donor ability by 1H and 13C NMR spectroscopy is also described.
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Álvarez-Valdés et al. (1990) studied this question.