Publication Date:
2014-02-14
Description:
Four new hybrid fluoroferrates synthesized with 1,4-diazabicyclooctane ( dabco ) are discussed. They were obtained through the use of conventional solvothermal synthesis in Teflon vessels to explore the composition space diagram of the (Fe 2+ ,Fe 3+ )- dabco -HF aq . chemical system with ethanol or dimethylformamide as solvent. These Class I hybrid fluorides exhibit isolated hydrated and/or fluorinated iron entities associated to mono or diprotonated amines according to the synthesis conditions. Their structures were determined from single crystal diffraction: ( dabco H 2 )[Fe III 2 F 8 (H 2 O) 2 ] ( I ), triclinic, space group P , Z = 2, a = 7.1657(2) Å, b = 7.6031(2) Å, c = 13.1497(3) Å, α = 73.631(1)°, β = 76.210(1)°, γ = 84.286(1)°, V = 667.1(1) Å 3 , R = 0.0299; ( dabco H 2 ) 2 [Fe III 2 F 10 ] · 2H 2 O ( II ), orthorhombic, space group Pbca , Z = 4, a = 12.9801(7) Å, b = 11.4624(6) Å, c = 13.8641(7) Å, V = 2062.7(2) Å 3 , R = 0.0425; ( dabco H) 4 [Fe III 2 F 10 ] · 10H 2 O ( III ), triclinic, space group P , Z = 1, a = 8.921(3) Å, b = 9.468(4) Å, c = 13.452(4) Å, α = 76.87(2)°, β = 74.62(2)°, γ = 74.86(2)°, V = 1042.2(6) Å 3 , R = 0.0549; ( dabco H)[(Fe II (H 2 O) 6 )(Fe III F 6 )] ( IV ), trigonal, space group P 31 c , Z = 2, a = 9.2866(2) Å, c = 10.2401(2) Å, V = 764.8(3) Å 3 , R = 0.0252. The paper focuses on structural descriptions, environment of dabco cations or iron species, and hydrogen bonding modes in the light of literature examples.
Print ISSN:
0044-2313
Electronic ISSN:
1521-3749
Topics:
Chemistry and Pharmacology
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