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  • 1
    Electronic Resource
    Electronic Resource
    Crystal and molecular structures of tri(o-tolyl)phosphinegold(I) purine-6-thiolate ethanol solvate (1/1) and tri(c-hexyl)phosphinegold(I) 6-methyl-2-thiouracilate (1994)
    Springer
    Journal of chemical crystallography 24 (1994), S. 805-810 
    Details
    ISSN: 1572-8854
    Keywords: Structures ; Au atom ; Thiolate ligands
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal and molecular structures of the title compounds, [(o-tol)3PAu(6-MP)]·EtOH and [(c-hexyl)3PAu(6-Me-2-TU)], have been determined and each show the presence of a linear geometry about the Au atom; both of the thionucleobases function as thiolate ligands. Important interatomic parameters for [(o-tol)3PAu(6-MP)] are Au−S 2.266(2), Au−P 2.239(2) Å and S−Au−P 177.03(8)° and for [(c-hexyl)3PAu(6-Me-2-TU)]: Au−S 2.299(3), Au−P 2.244(3) Å and S−Au−P 176.1(1)°. Crystals of [(o-tol)3PAu(6-MP)]·EtOH are monoclinic with space groupP21/n, and unit cell dimensionsa=10.067(2),b=10.518(2),c=25.416(4) Å, β=98.42(2)°,Z=4. The structure was refined to finalR=0.040 for 4183 data withI≥3.0σ(I). Crystals of [(c-hexyl)3PAu(6-Me-2-TU)] are monoclinic with space groupP21/c, and unit cell dimensionsa=9.692(4),b=15.822(4),c=15.775(3) Å, β=94.00(2)°,Z=4,R=0.033 for 2666 data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01668245
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  • 2
    Electronic Resource
    Electronic Resource
    Gradient-Enhanced 2D Multinuclear NMR and X-ray Diffraction Studies of Reaction Products of Dimethyltin(IV) Salicylaldoximate with Chiral Alcohols (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 1467-1472 
    Details
    ISSN: 1434-1948
    Keywords: Dimethyltin salicylaldoximates ; Chiral ligands ; Proton-tin HMQC NMR ; X-ray structure ; Trinuclear microclusters ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The complex {[(CH3)2Sn]2[(CH3)2SnO](OCH3)(HONZO)(ONZO)} (3) [ONZOH is the oximate residue, o-(-ON=CH-C6H4-OH), HONZO the corresponding phenolate residue, o-(HON=CH-C6H4-O-), and ONZO the dibasic species o-(-ON=CH-C6H4-O-), all derived from salicylaldoxime, o-(HON=CH-C6H4-OH)] reacts with an excess of racemic (d,l)-2-methyl-1-butanol to afford the μ2-substitution product 5a {[(CH3)2Sn]2[(CH3)2SnO][OCH2CH(CH3)CH2CH3](HONZO)(ONZO)]}. Crystallographic characterisation of the trinuclear microcluster 5a shows the presence of the monobasic HONZO ligand in a tridentate μ2-O,N mode and of the dibasic ONZO ligand in a tridentate O,N,O mode. This coordination mode leads to one seven-coordinate and two five-coordinate tin centers that are linked by a μ3-oxo function. The coordination geometries are distorted pentagonal bipyramidal and trigonal bipyramidal, respectively. The two low-coordinate tin atoms are linked by the alkoxide ion. The corresponding chiral (S)-2-methyl-1-butanol reacts analogously to yield 5b. By contrast, reaction of 3 with chiral secondary alcohols (2-butanol or 1-phenyl-1-ethanol), in various molar ratios, failed to provide the corresponding μ2-alkoxy complex. Instead, pure crystals of {[(CH3)2Sn]2[(CH3)2SnO](OH)(HONZO)(ONZO)} (2a) were isolated.
    Type of Medium: Electronic Resource
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