0000000000292192

AUTHOR

Johannes Schweifer

showing 3 related works from this author

Synthesis and characterisation of tetrazole compounds: 3 series of new ligands representing versatile building blocks for iron(II) spin-crossover com…

2005

Abstract New tetrazole compounds were synthesized and characterised by NMR and FTIR spectroscopy as well as by single crystal X-ray diffraction. We present in this paper mono- and ditetrazoles, which represent a versatile class of building blocks for the formation of mononuclear iron(II) complexes with monotetrazoles as terminal ligands as well as iron(II) coordination polymers with ditetrazoles as bridging ligands. Especially, the series of α,ω-bis[tetrazol-1-yl]-alkanes open the field of fascinating supramolecular structures with spin transition properties.

chemistry.chemical_classificationOrganic ChemistrySupramolecular chemistrySpin transitionCrystal structurePolymerNuclear magnetic resonance spectroscopyAnalytical ChemistryInorganic Chemistrychemistry.chemical_compoundCrystallographychemistrySpin crossoverTetrazoleSingle crystalSpectroscopyJournal of Molecular Structure
researchProduct

Structure and physical properties of [mu-tris(1,4-bis(tetrazol-1-yl)butane-N4,N4 ')iron(II)] bis(hexafluorophosphate), a new Fe(II) spin-crossover co…

2004

[mu-Tris(1,4-bis(tetrazol-1-yl)butane-N4,N4')iron(II)] bis(hexafluorophosphate), [Fe(btzb)(3)](PF6)(2), crystallizes in a three-dimensional 3-fold interlocked structure featuring a sharp two-step spin-crossover behavior. The spin conversion takes place between 164 and 182 K showing a discontinuity at about T-1/2 = 174 K and a hysteresis of about 4 K between T-1/2 and the low-spin state. The spin transition has been independently followed by magnetic susceptibility measurements, Fe-57-Mossbauer spectroscopy, and variable temperature far and midrange FIR spectroscopy. The title compound crystallizes in the trigonal space group P (3) over bar (No. 147) with a unit cell content of one formula u…

HALOGENATED ETHYLTETRAZOLESIRON(II)StereochemistrySpin transitionCrystal structureMagnetic susceptibilityTHERMAL HYSTERESISInorganic ChemistryBond lengthchemistry.chemical_compoundCrystallographyLattice constantchemistryMOLECULAR-INTERACTIONSSpin crossoverMAGNETIC-PROPERTIESFormula unitHexafluorophosphateTHEORETICAL DESCRIPTIONMOSSBAUERPHASE-TRANSITIONCOMPLEXESPhysical and Theoretical ChemistryELASTIC INTERACTION
researchProduct

catena-[µ-Tris(1,2-bis(tetrazol-1-yl)ethane-N4,N4')iron(II)] bis(tetrafluoroborate): synthesis, structure, spectroscopic and magnetic characterizatio…

2002

In analogy to a common synthesis of 1-substituted 5-H tetrazoles (Tetrahedron Lett. 36 (1995)1759; Beloruss. Gos. Univ., Minsk, USSR. Khim. Geterotsikl. Soedin. 11 (1985) 1521; Beloruss. Gos. Univ., Minsk, USSR. Khim. Geterotsikl. Soedin. 1 (1991) 66; BGU, Belarus. Vestsi Akad. Navuk Belarusi, Ser. Khim. Navuk 1 (1992) 73), the new bidentate ligand 1,2-bis(tetrazol-1-yl)ethane [endi] was synthesized and characterized by X-ray diffraction, NMR, IR and UV–Vis spectroscopy. By using iron(II) tetrafluoroborate hexahydrate the complexation with this ligand yields a 1-dimensional linear coordination polymer similar to the recently published chain compound (Inorg. Chem. 39 (2000) 1891) exhibiting …

TetrafluoroborateSpin statesChemistryLigandCoordination polymerSpin transitionMagnetic susceptibilityInorganic ChemistryCrystallographychemistry.chemical_compoundSpin crossoverMaterials ChemistryPhysical and Theoretical ChemistrySingle crystal
researchProduct