Synthesis, Crystal Structure, and Reactivity of Na5[CuO2](OH)2

Abstract

Na 5 [CuO 2 ](OH) 2 has been obtained as orange single crystals from mixtures of NaOH, Na 2 O and Cu 2 O in sealed Ag containers. The crystal structure has been refined from X-ray diffraction data (IPDS data, Pnma, Z = 4, a = 607.4(1) pm, b = 891.2(1) pm, c = 1201.0(2) pm, R 1 = 0.03). The characteristic unit is the bent [CuO 2 ] 3± complex (Ð(O±Cu±O) = 170°). The reactivity of Na 5 [CuO 2 ](OH) 2 has been studied by DSC and in situ X-ray diffraction techniques. IR spectroscopy has been used for further characterization. The Madelung Part of the Lattice Energy (MAPLE) has been calculated as well. Darstellung, Kristallstruktur und Reaktivita È t von Na 5 [CuO 2 ](OH) 2Inhaltsu È bersicht. Na 5 [CuO 2 ](OH) 2 wurde aus Gemengen von NaOH, Na 2 O und Cu 2 O in verschlossenen Ag-Containern in Form oranger Einkristalle erhalten. Die Kristallstruktur wurde anhand von Einkristalldaten bestimmt (IPDS-Daten, Pnma, Z = 4, a = 607,4(1) pm, b = 891,2(1) pm, c = 1201,0(2) pm, R 1 = 0,03). Die charakteristische Baueinheit, [CuO 2 ] 3± , liegt nicht linear vor (Ð(O±Cu±O) = 170°). Die Reaktivita È t von Na 5 [CuO 2 ](OH) 2 wurde thermoanalytisch (DSC) und mit in-situ-Ro È ntgendiffraktometrie untersucht. Anhand von IR-Spektren erfolgte die weitergehende Charakterisierung. Der Madelunganteil der Gitterenergie, MAPLE, fu È r Na 5 [CuO 2 ](OH) 2 wird ebenfalls diskutiert.

Synthesis and structure of La14V6CuO36.5: a transparent Cu(i) vanadate containing [OCuO]3−sticks

“…Na 5 [CuO 2 ](OH) 2 also belongs to this class, with an O-Cu-O angle of y170u, and is the first example of a Cu(I) oxide hydroxide. 11 Interestingly, some of these compounds have potential or proven electronic applications. [2][3][4][5][6]12 The superconductors are, of course, important electronic materials, whereas the delafossites have recently been identified as prototypes for the elusive p-type transparent conductors.…”