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'Chlorophenolates' in keywords Facet   section ZfN Section A  [X]
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1992 (2)
1Author    G. Wulfsberg, K. Shadid, B. Farris, J. Monn, T. Bonner, J. Yanisch, Al WeissRequires cookie*
 Title    Dioxin Precursors: NQR Studies of Group 1 and Related 2,6-Dichlorophenolate and 2,4,6-Trichlorophenolate Salts  
 Abstract    The 81 Br and 35 C1 NQR spectra of anhydrous Group 1, tetraalkylammonium, and thallium(I) 2,6-dichlorophenolates, 2,4,6-trichlorophenolates, and 4-bromo-2,6-dichlorophenolates were searched for evidence of solid-state cation-organochlorine interactions that might, for example, be (in part) responsible for the difference in the thermal decomposition reactions of these salts (to give the supertoxic environmental pollutants, the polychlorinated dibenzodioxins) versus those of the corresponding Group 11 chlorophenolate complexes, which do not decompose to dioxins. For cations ranging in size from tetraethylammonium to potassium, the total range of 35 C1 NQR frequencies in 2,6-dichlorophenolate and 2,4,6-trichlorophenolate salts is only 1.401 MHz, which, although larger than the 0.7 MHz range likely in molecular chlorocarbons, is smaller than in individual chlorophenolates of copper(I) and silver(I) (up to 2.0 MHz). In sodium and thallium(I) 2,4,6-trichlorophenolates substantially large frequency shifts (ca. 2.0 MHz) occur, to higher frequen-cies for the para-chlorines and lower frequencies for the ortho-chlorines (Na only). These disappear even in closely related compounds and show a pattern that seems unrelated to the decomposition products of the chlorophenolates. 
  Reference    Z. Naturforsch. 47a, 153—159 (1992); received July 16 1991 
  Published    1992 
  Keywords    Chlorophenolates, Nuclear quadrupole resonance, Dioxin 
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 TEI-XML for    default:Reihe_A/47/ZNA-1992-47a-0153.pdf 
 Identifier    ZNA-1992-47a-0153 
 Volume    47 
2Author    Gary Wulfsberg, Debra Jackson, William Ilsley, Shi-Qi Dou, Alarich Weiss, John GagliardiRequires cookie*
 Title    Coordination of OrfÄö-Chlorines in Copper (I) and Silver (I) 2,6-Di-and 2,4,6-Trichlorophenolates Crystal Structure of (2,4,6 -Trichlorophenolato-O, CI) bis (triphenylphosphine) silver (I)  
 Abstract    The crystal structure of (Ph 3 P) 2 AgOC 6 H 2 Cl 3 (I) is reported along with the syntheses and 35 C1 and 63 Cu NQR spectra of I and several related silver (I) and copper (I) 2,6-di-and 2,4,6-trichlorophe-nolates containing phosphines, phosphites, and pyridine as co-ligands. I crystallizes in space group P2 Jc with a= 16.692(4) Ä, b= 17.942 (4) A, c= 12.857 (3) Ä, /? = 97.60 (1)°, F = 3816.68 Ä 3 , and Z = 4. The final R (F) = 0.0475 and R (W) = 0.0396. Ag is coordinated in a trigonal planar geometry by the P atoms of the two triphenylphosphine ligands and the O atom of the chlorophenolate; Ag is then capped by one ortho-chlorine of the trichlorophenolate ligand at a distance of 3.160 (2) Ä. In the 35 C1 NQR spectrum of this compound the two orf/io-chlorines of the trichlorophenolate ligand have a large frequency difference of 1.500 MHz, indicating that one ortho-chlorine is coordinated to the silver; 35 C1 NQR spectra of related complexes are also presented and discussed. The 35 C1 NQR frequency differences of coordinated and non-coordinated orr/io-chlorines in metal chlorophenolates correlate well with the metal-chlorine distances but not with the metal-chlorine-carbon bond angles. A different correlation is found for the silver complexes of dichloroalkanes; possible reasons for this are discussed. 
  Reference    Z. Naturforsch. 47a, 75—84 (1992); received July 15 1991 
  Published    1992 
  Keywords    Nuclear quadrupole resonance, Chlorophenolates, Crystal structure, Chlorocarbons as ligands, Silver(I) complexes 
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 TEI-XML for    default:Reihe_A/47/ZNA-1992-47a-0075.pdf 
 Identifier    ZNA-1992-47a-0075 
 Volume    47