Primary to secondary sphere coordination of 18-crown-6 to lanthanide (III) nitrates: Structural analysis of [Pr(NO{sub 3}){sub 3}-(18-crown-6)] and [M(NO{sub 3}){sub 3}(OH{sub 2}){sub 3}]{center_dot}18-crown-6 (M = Y, Eu, Tb-Lu)
- Northern Illinois Univ., DeKalb, IL (United States)
The direct reaction of hydrated lanthanide nitrate salts with 18-crown-6 in 3:1 CH{sub 3}CN:CH{sub 3}OH has resulted in the isolation and structural characterization of [Pr(NO{sub 3}){sub 3}(18-crown-6)] and [M(NO{sub 3}){sub 3}(OH{sub 2}){sub 3}]{center_dot}18-crown-6 (M=Y, Eu, Tb-Lu). (The Eu and Yb analogs were confirmed with preliminary cell data only). [Pr(NO{sub 3}){sub 3}(18-crown-6)] is 12-coordinate icosahedral and crystallizes in the orthorhombic space group Pbca with (at 20{degrees}C) a = 12.230(2), b = 15.598(4), c = 21.777(9) {angstrom} and D{sub calc} = 1.89 g cm{sup -3} for Z = 8. The seven isostructural [Pr(NO{sub 3}){sub 3}(18-crown-6)] complexes all contain 9-coordinate capped square antiprismatic metal centers hydrogen bonded via the bound water molecules to D{sub 3d} 18-crown-6 within the lattice to form hydrogen bonded polymeric chains.
- OSTI ID:
- 240970
- Journal Information:
- Journal of Chemical Crystallography, Journal Name: Journal of Chemical Crystallography Journal Issue: 5 Vol. 24; ISSN 1074-1542; ISSN JCCYEV
- Country of Publication:
- United States
- Language:
- English
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