Research Article: Redetermination of [Pr(NO3)3(H2O)4]·2H2O

Date Published: July 01, 2012

Publisher: International Union of Crystallography

Author(s): Roel Decadt, Pascal Van Der Voort, Isabel Van Driessche, Rik Van Deun, Kristof Van Hecke.


The structure of the title compound, tetra­aqua­tris­(nitrato-κ2O,O′)praseodymium(III) dihydrate, was redetermined. The structure models derived from the previous determinations [Rumanova et al. (1964 ▶). Kristallografiya, 9, 642–654; Fuller & Jacobson (1976 ▶). Cryst. Struct. Commun.5, 349–352] were confirmed, but now with all H atoms unambiguously located, revealing a complex O—H⋯O hydrogen-bonding network, extending throughout the whole structure. In the title compound, the coordination environment of the PrIII atom can best be described as a distorted bicapped square anti­prism defined by three bidentate nitrate anions and four water mol­ecules. Additionally, two lattice water mol­ecules are observed in the crystal packing. The title compound is isotypic with several other lanthanide-containing nitrate analogues.

Partial Text

For general background and the synthesis of the title compound, see: Liu et al. (2012 ▶). For the original determined structures, see: Fuller & Jacobson (1976 ▶); Rumanova et al. (1964 ▶). For analogous Ln-containing structures (Ln = lanthanide), see: Kawashima et al. (2000 ▶); Rogers et al. (1983 ▶); Shi & Wang (1990 ▶, 1991 ▶); Stumpf & Bolte (2001 ▶). For related structures of metal-organic compounds, see: Rohde & Urland (2006 ▶); Weakley (1982 ▶, 1984 ▶, 1989 ▶). For databases of (in)organic structures, see: Allen (2002 ▶); Bergerhoff et al. (1983 ▶); ICSD (2009 ▶).




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