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8 citations found for Hagen, K.
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A method enabling the retrieval of thickness or projected electron density of a sample from a single input image is derived theoretically and successfully demonstrated on experimental data.
research papers (organic compounds)
abstracts
book reviews
metal-organic compounds
The title compound, [Fe(C7H5O2)2(CH4O)4], is a centrosymmetric six-coordinate FeII complex coordinated by two axial monodentate benzoate ligands and four methanol ligands in the equatorial plane [Fe-Obenzoate 2.0935 (7) Å, and Fe-Omethanol 2.1310 (7) and 2.1290 (7) Å]. The benzoate ligands adopt monodentate ligation, rather than a bridged polymeric structure, because of strong intra- and intermolecular hydrogen bonds to the methanol ligands. This structure is nearly identical to that obtained with a much bulkier carboxylate ligand [Chavez, Que & Tolman (2001). Chem. Commun. pp. 111-112].
metal-organic compounds
The crystals of the title compound, {[Co(en)2(MeCN)]2(μ-O2)}(CF3SO3)4 or [Co2(O2)(C2H3N)2(C2H8N2)4](CF3O3S)4, are built of binuclear tetracations and trifluoromethanesulfonate anions. The cation occupies a special position on the inversion center; the separation between the Co atoms, which have a slightly distorted octahedral coordination, is 4.4966 (7) Å, with Co—N(MeCN), Co—O, and average Co—N(en) distances of 1.938 (2), 1.8736 (17), and 1.950 Å, respectively. Both acetonitriles are trans to the O—O bridge, the O—O distance being 1.496 (3) Å. The [Co(en)2] moieties have δδ and the inversion-related λλ conformations.
research papers
X-ray phase-contrast microtomography is demonstrated using two-dimensional amplitude modulation of the beam. The implementation is characterised in terms of angular sensitivity and spatial resolution, and its application to the three-dimensional imaging of biological soft tissues is shown.
organic compounds
The title compound, C48H60O8·3C3H7NO, is a derivative of calix[4]arene in the cone conformation, modified with distal carboxylic acid functional groups at the lower rim. A clathrate dimethylformamide (DMF) molecule is located within the calix[4]arene cone, and two DMF solvate molecules participate in hydrogen bonding with the carboxylic acid groups. Intramolecular hydrogen bonds are also formed between the OH groups and the adjacent ether groups in the partially substituted calix[4]arene.
