Abstract
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 (Fe2+,Fe3+)-dabco-HFaq. 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: (dabcoH2)[FeIII2F8(H2O)2] (I), triclinic, space group Pequation image, 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) Å3, R = 0.0299; (dabcoH2)2[FeIII2F10]·2H2O (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) Å3, R = 0.0425; (dabcoH)4[FeIII2F10]·10H2O (III), triclinic, space group Pequation image, 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) Å3, R = 0.0549; (dabcoH)[(FeII(H2O)6)(FeIIIF6)] (IV), trigonal, space group P31c, Z = 2, a = 9.2866(2) Å, c = 10.2401(2) Å, V = 764.8(3) Å3, 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.