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  • 1990-1994  (2)
  • 1970-1974
  • Aurate(I), bis[2,4,6-tri(isopropyl)thiophenolato] ammonium  (1)
  • Organic Chemistry  (1)
  • 1
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and Crystal Structure of the First Quinoid Dihydropterinmolybdenum (IV) ComplexThe first molybdenum(IV) complex with a quinoid dihydropterin, i.e. 2, was isolated and characterized by IR, UV and NMR data and single-crystal X-ray diffraction. The reaction of MoVIO2Cl2 with the biologically important 6β-5,6,7,8-tetrahydro-L-biopterin(2) (7) in MeOH gave almost quantitatively trichloro(1,5-quinoid-7,8-dihydro-6H-L-biopterin)oxomolybdenLim(IV) (2). The complex crystallizes with one molecule of MeOH in the noncentrosymmetric orthorhombic space group P212121 (No. 19) with unit cell dimensions a = 1009.3(3), b = 1104.7(3), and c = 1484.5(4) pm and Z = 4. The Mo-atom has a distorted octahedral geometry (Fig.1). It is coordinated by N(5) and O(4) of the pterin ligand. The distance of the Mo-N(5) bond (202 pm) is unusually short compared to similar complexes. O(4) is located trans to a terminal oxo ligand. The octahedral coordination is completed by three Cl-atoms in a meridional arrangement. Complex 2, with the Mo-atom in the enzyme-relevant oxidation state +IV and the pterin in the intermediate quinoid dihydro form, should lead to an extension of the proposed ‘common molybdenum cofactor’ model.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 2161-2164 
    ISSN: 0009-2940
    Keywords: Gold(I) 2,4,6-tri(isopropyl)thiophenolate, hexamer ; Aurate(I), bis[2,4,6-tri(isopropyl)thiophenolato] ammonium ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thiolato Complexes of Monovalent Gold. Synthesis and Structure of [(2,4,6-iPr3C6H2S)Au]6 and (NH4)[(2,4,6-iPr3C6H2S)2Au]Reaction of Au(CO)Cl with 2,4,6-tri(isopropyl)thiophenol affords hexameric gold(I) thiolate [(2,4,6-iPr3C6H2S)Au]6 (1). According to an X-ray analysis 1 forms a centrosymmetrical twelve-membered Au - S ring in the chair conformation with the linearly coordinated Au atoms at the mid-edges and the S atoms at the corners of the heterocycle. When the reaction of 2,4,6-tri(isopropyl)thiophenol is carried out with AuI in liquid ammonia the thiolato complex [(2,4,6-iPr3C6H2S)2Au]- -NH+4 (2) is obtained. It crystallizes as NH4 · 2 · 3 NH3. The gold atom in 2 is linearly coordinated by two thiolato S atoms. The ammonium cation forms hydrogen bonds with three NH3 solvate molecules.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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