| | 1 | Author
| G. S. Sodhi, J. Kaur | Requires 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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| default:Reihe_B/47/ZNB-1992-47b-1297.pdf | | | | Identifier
| ZNB-1992-47b-1297 | | | | Volume
| 47 | |
| 2 | Author
| Juan Murgich, Yosslen Aray, Edgar Ospina, Rico, Ismardo Bonalde | Requires 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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| default:Reihe_A/47/ZNA-1992-47a-0096.pdf | | | | Identifier
| ZNA-1992-47a-0096 | | | | Volume
| 47 | |
| 3 | Author
| Juan Murgich, Yosslen Aray, EdgarOspina Rico | Requires 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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| default:Reihe_A/47/ZNA-1992-47a-0217.pdf | | | | Identifier
| ZNA-1992-47a-0217 | | | | Volume
| 47 | |
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