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1,2,4-triazolo[4,3-a]pyrimidines: a new kind of ligands. Structure of the silver(I) dimer with the 7-oxo derivative by Sawsan Salameh; Mohammad Abul-Haj; Miguel Quirós; Juan M. Salas is a Chemistry article available to read on EtoBox.

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This paper describes the silver dinuclear complex [Ag 2 L 2 (NO 3 ) 2 ] AE 2H 2 O, where L represents the bridging ligand 7,8-dihydro-7oxo-1,2,4-triazolo [4,3-a]pyrimidine, this being the first example of a coordination compound of a 1,2,4-triazolo[4,3-a]pyrimidine derivative. As a difference with the most studied 1,2,4-triazolo[1,5-a]pyrimidine derivatives, the coordination takes place through the contiguous nitrogen atoms of the triazole ring, closing a six member Ag 2 N 4 core with a higher intermetallic distance, 3.4791(3) A ̊. Linear coordination of silver is not possible in this geometry, so flat trigonal coordination involving also the nitrate counteranion is found instead.

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Author

Sawsan Salameh; Mohammad Abul-Haj; Miguel Quirós; Juan M. Salas

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0020-1693)

Published

2005

Language

EN

Field

Chemistry (Physical Sciences)