Sökning: "Lone-pair of electrons"

Hittade 3 avhandlingar innehållade orden Lone-pair of electrons.

  1. 1. Design of new materials with crystal structure-related properties : The role of lone pair cations

    Författare :Eleni Mitoudi Vagourdi; Mats Johnsson; Vadim Kessler; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Crystal structure determination; New oxohalide compounds; Lone-pair electrons; X-ray diffraction; Physical properties; oorganisk kemi; Inorganic Chemistry;

    Sammanfattning : Non-centrosymmetry and low-dimensional arrangements, e.g. chains or layers, are very attractive structural characteristics of crystalline compounds since they are linked to some physical properties including nonlinear optical activity, ferroelectricity and magnetic frustration. LÄS MER

  2. 2. A new synthetic strategy for low-dimensional compounds : Lone pair cations and alkaline earth spacers

    Författare :Rie Takagi Fredrickson; Mats Johnsson; Sven Lidin; Lars Kloo; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Alkaline earth; Lone pair elements; Low-dimensional compounds; Inorganic chemistry; Oorganisk kemi; oorganisk kemi; Inorganic Chemistry;

    Sammanfattning : Complex transition metals oxyhalides containing a lone pair element, such as tellurium (IV), form an attractive research field because there is a high probability of finding new low-dimensionally arranged compounds and, particularly, a low-dimensionally arranged transition metals substructures, leading to interesting physical properties. Tellurium (IV) can drive the formation of many unusual structures because of its stereochemically active lone pair electrons, E. LÄS MER

  3. 3. "Chemical scissors" - a shortcut to the low-dimensional world

    Författare :Zuzana Hugonin; Sven Lidin; P. Shiv Halasyamani; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Lone-pair of electrons; Low-dimensional compounds; Antimony oxo-halides; Inorganic chemistry; Oorganisk kemi; oorganisk kemi; Inorganic Chemistry;

    Sammanfattning : A number of oxo-halide compounds have been prepared and studied. The antimony Sb3+ cation shows great flexibility in adopting coordination numbers of three or four, and, since this ion carries a stereochemically active lone-pair of electrons (E), both coordinations are one-sided. LÄS MER