33 research outputs found
μ-Carbonato-bis(bis{2-[(diethylamino)methyl]phenyl}bismuth(III))
The molecular structure of the title compound, [Bi2(C11H16N)4(CO3)], consists of a symmetrically bridging carbonato group which binds two [2-Et2NCH2C6H4]2Bi units that are crystallographically related via a twofold rotation axis bisecting the carbonate group. The two Bi atoms and two of the C atoms directly bonded to bismuth are quasi-planar [deviations of 0.323 (1) and 0.330 (9)Å for the Bi and C atoms, respectively] with the carbonate group. The remaining two ligands are in a trans arrangement relative to the quasi-planar (CBi)2CO3 system. The metal atom is strongly coordinated by the N atom of one pendant arm [Bi—N = 2.739 (6) Å], almost trans to the O atom, while the N atom of the other pendant arm exhibits a weaker intramolecular interaction [Bi⋯N = 3.659 (7) Å] almost trans to a C atom. If both these intramolecular N→Bi interactions per metal atom are considered, the overall coordination geometry at bismuth becomes distorted square-pyramidal [(C,N)2BiO cores] and the compound can be described as a hypervalent 12-Bi-5 species. Additional quite short intramolecular Bi⋯O interactions are also present [3.796 (8)–4.020 (9) Å]. Intermolecular associations through weak η6⋯Bi interactions [Bi⋯centroid of benzene ring = 3.659 (1) Å] lead to a ribbon-like supramolecular association
4-Benzylpiperazin-1-ium chloride chloroform solvate
The ions of the title chloroform-solvated salt, C11H17N2
+·Cl−·CHCl3, are linked by a strong N—H⋯Cl hydrogen bond; the solvent molecule also interacts with the chloride ion through a C—H⋯Cl hydrogen bond. Additionally, neighboring cations form weak hydrogen bonds to the anion, resulting in a supramolecular ribbon that runs along the a axis
Geospatial Information Research: State of the Art, Case Studies and Future Perspectives
Geospatial information science (GI science) is concerned with the development and application of geodetic and information science methods for modeling, acquiring, sharing, managing, exploring, analyzing, synthesizing, visualizing, and evaluating data on spatio-temporal phenomena related to the Earth. As an interdisciplinary scientific discipline, it focuses on developing and adapting information technologies to understand processes on the Earth and human-place interactions, to detect and predict trends and patterns in the observed data, and to support decision making. The authors – members of DGK, the Geoinformatics division, as part of the Committee on Geodesy of the Bavarian Academy of Sciences and Humanities, representing geodetic research and university teaching in Germany – have prepared this paper as a means to point out future research questions and directions in geospatial information science. For the different facets of geospatial information science, the state of art is presented and underlined with mostly own case studies. The paper thus illustrates which contributions the German GI community makes and which research perspectives arise in geospatial information science. The paper further demonstrates that GI science, with its expertise in data acquisition and interpretation, information modeling and management, integration, decision support, visualization, and dissemination, can help solve many of the grand challenges facing society today and in the future