Coordination Chemistry Reviews 193–195 (1999) 1119–1142 Metal complexes of [1,2,4]triazolo-[1,5-a]pyrimidine derivatives Juan M. Salas *, M. Angustias Romero, M. Purificacio ´n Sa ´nchez, Miguel Quiro ´s Departamento de Quı ´mica Inorga ´nica, Facultad de Ciencias, Uniersidad de Granada, 18071 Granada, Spain Received 8 October 1998; accepted 7 December 1998 Contents Abstract .................................................... 1119 1. Introduction ............................................... 1120 2. The ligands ............................................... 1122 3. Compounds without a direct metal-triazolopyrimidine bond ................... 1125 4. Copper(II) complexes .......................................... 1126 5. Manganese, iron, cobalt, nickel, zinc, cadmium and mercury complexes ............ 1128 6. Heterometallic compounds including Hg(II) ............................. 1131 7. Silver(I) and copper(I) complexes ................................... 1132 8. Platinum group metal complexes ................................... 1135 9. Biological activity ............................................ 1139 10. Conclusions ............................................... 1139 Appendix A ................................................. 1140 References .................................................. 1140 Abstract This article covers all the research work published until September 1998 about the coordination chemistry of 1,2,4-triazolo-[1,5-a]pyrimidine derivatives. The revision is mainly focused in the structural features of the compounds, obtained from single crystal X-ray diffraction. The references are classified according to the present metal atoms. These kind of ligands display a broad versatility when binding metal ions, monodentate binding through www.elsevier.com/locate/ccr * Corresponding author. Tel.: +34-958-248525; fax: 34-958-248526. E-mail address: jsalas@goliat.ugr.es (J.M. Salas) 0010-8545/99/$ - see front matter © 1999 Elsevier Science S.A. All rights reserved. PII:S0010-8545(99)00004-1