Sökning: "three center four electron"

Hittade 3 avhandlingar innehållade orden three center four electron.

  1. 1. Investigation of [N-X-N]+ and [N-C-N]+ complexes in solution Exploring Geometry, Stability and Symmetry

    Författare :Alavi Karim; Göteborgs universitet.; Gothenburg University.; [2017]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; three center four electron; halonium; carbenium; carbonium; pentavalent; symmetry; NMR; variable temperature; counterion; isotopic perturbation of equilibrium;

    Sammanfattning : Halogen bonding is a weak interaction. In this thesis the three center four electron halogen bond, [N−X−N]+, has been studied. The lighter halogens form highly unstable halonium ions that are reactive towards nucleophiles and their complexes were therefore investigated at low temperatures. LÄS MER

  2. 2. Modulations in B8-type Intermetallics

    Detta är en avhandling från Inorganic Chemistry, Chemical Center, Lund University

    Författare :Margareta Elding-Pontén; Lund University.; Lunds universitet.; [1997]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Electron diffraction; X-ray diffraction; Superspace group; Edshammar polyhedron; Mn-Sn; Cu-In; B8-type; Ni2In; NiAs; Modulation; Superstructure; Inorganic chemistry; Oorganisk kemi;

    Sammanfattning : The B8-type regions of the Mn-Sn and Cu-In systems have been investigated by means of electron and X-ray diffraction. The importance of the combination of these techniques in the study of B8-type phases is pointed out. In addition to the B8-type phases an alloy with a quasicrystal approximant structure has been studied. LÄS MER

  3. 3. Structural analysis of microsomal glutathione transferase 1 by electron crystallography

    Detta är en avhandling från Stockholm : Karolinska Institutet, Biosciences and Nutrition

    Författare :Ingeborg Schmidt-Krey; Karolinska Institutet.; Karolinska Institutet.; [1999]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : The goals of this project were the two-dimensional crystallization of the membrane protein microsomal glutathione transferase 1 and the three-dimensional structure determination by electron crystallography. Microsomal glutathione transferase 1 is a homotrimeric membrane protein. LÄS MER