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'Complexes' in keywords Facet   Publication Year 1992  [X]
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1992[X]
1Author    G. S. Sodhi, J. KaurRequires cookie*
 Title    Thermogravimetric Studies on Bimetallic Dithiocarbamate Complexes+  
 Abstract    Thermogravimetric (TG) studies have been carried out for some bimetallic dithiocarbamate complexes o f the type ZnM L4 and N iM 'L 4 [M = Co(II), Cu(II); M' = Zn(II), Hg(II); L = N-methylcyclohexyldithiocarbamate; L' = N-ethylcyclohexyldithiocarbamate]. From TG curves, the order, apparent activation energy and apparent activation entropy for the thermal decomposition reaction have been calculated. The thermal stabilities have been correlated with the structures o f the complexes on the basis o f hard and soft acid base (H SA B) theory. 
  Reference    Z. Naturforsch. 47b, 1297—1299 (1992); received March 16 1992 
  Published    1992 
  Keywords    Thermogravimetry, Complexes, Activation Energy 
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 TEI-XML for    default:Reihe_B/47/ZNB-1992-47b-1297.pdf 
 Identifier    ZNB-1992-47b-1297 
 Volume    47 
2Author    Juan Murgich, Yosslen Aray, Edgar Ospina, Rico, Ismardo BonaldeRequires cookie*
 Title    N NQR in 1,10-Phenanthroline and Dicyano bis(l,10-phenanthroline)iron(III)  
 Abstract    14 N NQR spectra of 1,10-phenanthroline and of dicyano bis(l,10-phenanthroline)iron(lll) were obtained at room temperature. An analysis based on the shifts of the NQR frequencies and in the topology of the charge distribution in a model (pyridine) showed that the complex formation produces a strong decrease in the N valence shell nonbonded maximum and an increase in the bonded density along each of the N-H bond directions. The NQR spectrum showed that the complex formation produces only small changes in the charge distribution of the cyanide groups. 
  Reference    Z. Naturforsch. 47a, 96—98 (1992); received August 3 1991 
  Published    1992 
  Keywords    14 N NQR, Phenanthroline, Complex, Charge distribution, Topology 
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 TEI-XML for    default:Reihe_A/47/ZNA-1992-47a-0096.pdf 
 Identifier    ZNA-1992-47a-0096 
 Volume    47 
3Author    Juan Murgich, Yosslen Aray, EdgarOspina RicoRequires cookie*
 Title    N NQR and the Molecular Charge Topology in Coordinated Ammonia  
 Abstract    14 N NQR spectra of [Co(NH3)6] • 3C1, [Co(NH3)5C03] • N03, [Zn(NH3)4] • 2C1, [Zn(NH3)4] • (BF4)2, and [Ag(NH3)4] • N03 were obtained at 77 K. The results, analyzed by means of the topology of the charge distribution obtained from ab-initio MO calculations of free and of a model of coordinated NH3, showed that bonding to the metal-ion produces a strong decrease (Co^>Zn %Ag) in the N nonbonded density ("lone pair") and an increase in the bonded maxima found in the N-H bond direction of the N valence shell. 
  Reference    Z. Naturforsch. 47a, 217—220 (1992); received August 3 1991 
  Published    1992 
  Keywords    14 N NQR, Ammonia, Complex, Charge distribution, Topology 
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 TEI-XML for    default:Reihe_A/47/ZNA-1992-47a-0217.pdf 
 Identifier    ZNA-1992-47a-0217 
 Volume    47