Syntheses and structures of silver(I) complexes of 4-amino-3,5-dimethyl-4H-1,2,4-triazole and 4-amino-3,5-diethyl-4H-1,2,4-triazole: role of the substituents |
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Authors: | Guang Yang Ying-Li Wang Li-Li Liu Seik Weng Ng |
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Affiliation: | (1) Department of Chemistry, Zhengzhou University, 450001 Zhengzhou, China;(2) Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia |
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Abstract: | Five silver(I) adducts of 4-amino-3,5-diethyl-4H-1,2,4-triazole (4-NH2-3,5-Et2-tz) or 4-amino-3,5-dimethyl-4H-1,2,4-triazole (4-NH2-3,5-Me2-tz), namely [Ag4(4-NH2-3,5-Et2-tz)6](ClO4)4 (1), [Ag(4-NH2-3,5-Et2-tz)2] n ·n(ClO4) (2), [Ag4(4-NH2-3,5-Et2-tz)6](CF3SO3)4 (3), [Ag4(4-NH2-3,5-Me2-tz)6](ClO4)4·4H2O (4) and [Ag4(4-NH2-3,5-Me2-tz)6](CF3SO3)4·2H2O (5), have been prepared and structurally characterised by X-ray single crystal diffraction. Two types of Ag4tz6 cluster have been observed in the structures of compound 1, 3, 4 and 5, which is rationalised based on the minimisation of the steric repulsions between the substituents on the 3,5-positions of triazole ring. Compound 2 displays an infinite chain structure and may be an intermediate or a minor product in the preparation. |
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