Koner, Subratanath ; Ghosh, Ashutosh ; Chaudhuri, Nirmalendu Ray (1990) Solid state thermal isomerisation of diethylenetriamine complexes of NiX2 (X = NO3, ClO4, BF4 and CF3SO3) Transition Metal Chemistry, 15 (5). pp. 394-398. ISSN 0340-4285
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Official URL: https://link.springer.com/article/10.1007/BF011774...
Related URL: http://dx.doi.org/10.1007/BF01177469
Abstract
[Ni(dien) 2]X2•nH2O (dien = diethylenetriamine; n = 0, X = NO3 or CF3SO3; n = 0.5, X = ClO4 or BF4 and n = 2, X = CF3SO3) complexes have been prepared and investigated thermally in the solid state. [Ni(dien) 2](NO3)2 (1) and [Ni(dien) 2](CF3SO3)2 (2) undergo endothermic irreversible phase transitions (209–247°C and 184–205°C; ΔH=5.6 kJ mol−1 and 7.7 kJ mol−1 for (1) and (2), respectively). [Ni(dien) 2](ClO4)2•0.5H2O (3) shows an endothermic irreversible phase transition after deaquation (201–216°C; ΔH=7.7 kJ mol−1). [Ni(dien) 2](BF4)2•0.5H2O also shows an endothermic irreversible phase transition after deaquation, accompanied by partial decomposition. All the complexes possess octahedral geometry with the ligands arranged meridionally. The phase transitions are explained in terms of conformational changes of the triamine chelate rings.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Springer-Verlag. |
| ID Code: | 108457 |
| Deposited On: | 17 Oct 2017 13:02 |
| Last Modified: | 17 Oct 2017 13:02 |
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