Sökning: "tetranuclear"

Visar resultat 1 - 5 av 8 avhandlingar innehållade ordet tetranuclear.

  1. 1. Dependence of the coordination number of silver(I) in crystalline halogenoargentates(I) on the nature of the cation

    Författare :Göran Helgesson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; clusters; idioargentates I ; halogenocuprates I ; tetraphenylarsonium; crown ethers; tetranuclear; chloroargentates I ; bromoargentates I ; mononuclear; Halogenoargentates I ; heteronuclear; tetraethylammonium; dinuclear; cryptates; tetramethylammonium; crystal structure; silver I ;

    Sammanfattning : .... LÄS MER

  3. 2. Synthesis and Structural Characterization of Copper(I) Complexes with Hard Donor Ligands

    Författare :Björn Gustafsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Acetonitrile; ­ -Sparteine; Chloride; co-ordination chemistry; Phenoxide; Alkene; Bromide; crystal structure; Copper I ; Amine;

    Sammanfattning : Syntheses and crystal structures of nine new copper(I) complexes and one novel mixed-valence copper(I/II) complex are reported: two homoleptic phenoxides and eight complexes with N-donor ligands. The copper(I) and the copper(I/II) phenoxide complexes have been prepared by reactions between mesitylcopper(I) and 2-allyl-6-methylphenol in toluene. LÄS MER

  4. 3. A nuclear magnetic resonance study of dialkyldithiophosphate complexes : polycrystalline and surface adsorbed

    Författare :Anna-Carin Larsson; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry of Interfaces; Gränsytors kemi;

    Sammanfattning : 31P, 13C and 207Pb NMR were used to characterize different metal (Ni, Zn, Pb) dialkyldithiophosphate complexes. Eight different sodium or potassium dialkyldithiophosphate salts (alkyl groups R=ethyl-, n-propyl, iso-propyl, n- butyl, iso-butyl, sec-butyl, iso-amyl and cyclo-hexyl) were used as starting materials. LÄS MER

  5. 4. Dinuclear metal complexes modelling active sites of metallohydrolases

    Författare :Martin Jarenmark; Kemisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bioinorganic chemistry; enzymes; hydrolases; models; dinuclear; heterodinuclear; phosphotriesterase; purple acid phophatase;

    Sammanfattning : To study the active sites of dinuclear metallohydrolases new metal complexes that model these sites both in structure and function have been synthesized using two new phenol based dinucleating ligands, 2-(N-isopropyl-N-((2-pyridyl)methyl)aminomethyl)-6-(N-(carboxylmethyl)-N-((2-pyridyl)methyl)aminomethyl)-4-methylphenol (IPCPMP) and 2,6-Bis[N-(N-(carboxymethyl)-N-(pyridylmethyl)amine)methyl]-4-methylphenolate (BCPMP). Both ligands contain pyridyl, tertiary amine and carboxylate groups but in IPCPMP one carboxylate donor is exchanged for a non-coordinating group yielding an unsymmetric ligand while BCPMP is symmetric with identical sets of ligands on either side of the phenol group. LÄS MER

  7. 5. Mechanistic Studies of Dinuclear Metalloenzymes - A Model Approach

    Författare :Håkan Carlsson; Kemiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; models; Enzymes; bioinorganic chemistry; dinuclear; urease; nickel; zinc triphosphoesterase; Oorganisk kemi; Inorganic chemistry;

    Sammanfattning : With the goal to study the mechanisms of dinuclear metalloenzymes, a new line of synthetic and computational models were prepared and studied. Mixed imidazole and carboxylate multidentate complexes were synthesized to better simulate carboxylate-rich ligand environments. LÄS MER