Sökning: "formamide"

Visar resultat 1 - 5 av 6 avhandlingar innehållade ordet formamide.

  1. 1. Intermolecular interactions in hydrogen bonded 1:1 molecular complexes. A matrix isolation study

    Författare :Anders Engdahl; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; infrared laser irradiation; dimethyl ether; water dimer; hydrogen chloride; formamide; acetone; formic acid; ammonia; water; intermolecular; matrix isolation; FIR; FTIR; infrared; isomerisation; ab initio; Physical chemistry; Fysikalisk kemi;

    Sammanfattning : A number of matrix isolated binary hydrogen bonded complexes with water as one of the components have been investigated with FTIR in the mid and far infrared regions. Water has been found to be the hydrogen bond donor in complexes with water, ammonia, dimethyl ether and acetone. LÄS MER

  3. 2. Modeling of intra- and intermolecular potentials

    Författare :Stevica Brdarski; Beräkningskemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Theoretical chemistry; N-formylglycinamide; formamide; water dimer; quantum chemistry; molecular dynamics simulations; repulsion modeling; perturbation theory; NEMO; molecular interactions; Teoretisk kemi; kvantkemi;

    Sammanfattning : Modeling of interactions between molecules is investigated by theoretical means within the NEMO model. The model is based on a partitioning of the interaction energy at the Hartree-Fock level into first- and second-order perturbation theory. The interaction energy is given as a sum of electrostatic, induction, repulsion, and dispersion energies. LÄS MER

  4. 3. Microcalorimetric methods for direct measurement of solubility and solvent activity

    Författare :Dennis Berling; Biokemi och Strukturbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; enthalpy of solution; solubility; solvent fugacity; solvent activity; Isothermal calorimetry; vapour pressure; Chemistry; Kemi;

    Sammanfattning : New calorimetric methods for direct measurement of solubility and solvent activity are presented. The classical role of calorimetry for measurements of enthalpic parameters is abandoned and the technique is instead used for assessing thermodynamic quantities related to the chemical potential of a substance in a solution. LÄS MER

  5. 4. Selectivity in Host-Guest Chemistry

    Författare :Gunnar Westman; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis describes host-guest complexes with the use of a biphenyl crown ether or cyclodextrin as host. Complexes between the biphenyl crown ether and salts form phenylalanine esters were studied. LÄS MER

  7. 5. New approaches to moisture determination in complex matrices based on the Karl Fischer Reaction in methanolic and non-alcoholic media

    Författare :William Larsson; Anders Cedergren; Heinz-Dieter Isengard; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Karl Fischer titration; non-alcoholic reagent; trace moisture determination.; Analytical chemistry; Analytisk kemi;

    Sammanfattning : Vattenhaltsbestämning är av stor vikt i många sammanhang. T.ex. kan vattenhalten påverka utbytet av en kemisk syntes, eller ha negativ inverkan på hållbarheten av läkemedel och livsmedel. LÄS MER