Crystal structure of K2Pb(NO2)3(NO3)·H2O

Crystals of K2Pb(NO2)3(NO3)·H2O are orthorhombic (Pbca) with unit-cell dimensions: a = 6.766(5), b = 11.999(7), c = 26.61(2) A, Z = 8. The structure has been determined from diffractometer data by the heavy-atom technique and refined by full-matrix least-squares to an R value of 7.13% for 1285 independent reflections. The lead atom is surrounded by nine ligating atoms belonging to nitrate and nitrite groups. The NO−3 ion and two NO−2 ions are chelating to metal in a bidentate fashion through their oxygen atoms, while the third NO−2 ion acts as a bridge through two metal centers involving in coordination all its three atoms. The two K+ ions are in different structural environments which differ by the number and the arrangement of the ligating atoms.