Abstract
Single crystals of a Re(VII) complex, the dihydrogenophosphato phenanthroline trioxo-rhenium monohydrate of formula [ReO3(phen)(H2PO4)]center dot H2O (phen = 1,10-phenanthroline), were prepared in aqueous solution. X-Ray analysis shows that it crystallizes in the monoclinic space group P2(1)/c with the unit cell parameters: a=8.611(2), b=13.881(2), c=14.502(4) angstrom, beta = 120.87(2)degrees, V = 1487.9(6) angstrom(3) and Z =4. In the neutral complex, the rhenium is in the oxidation state +VII, coordinated by two nitrogen atoms of the bidentate phen, three terminal oxygen atoms and, for the first time, one oxygen atom of the mono-deprotonated phosphoric acid ligand H2PO4-, forming a square-based bipyramidal coordination geometry. The thermal stability, IR., UV/Vis and fluorescence spectroscopic properties are given. The complex shows antimicrobial activity against five different microbes.