SOLID-STATE THERMAL-ISOMERIZATION OF DIETHYLENETRIAMINE COMPLEXES OF NINO3-2, NICLO4-2, NIBF4-2 AND NICF3CO3-2

被引：12

作者：

KONER, S ^{[1
]}

GHOSH, A ^{[1
]}

CHAUDHURI, NR ^{[1
]}

机构：

[1] INDIAN ASSOC CULTIVAT SCI,DEPT INORGAN CHEM,CALCUTTA 700032,W BENGAL,INDIA

来源：

TRANSITION METAL CHEMISTRY | 1990年 / 15卷 / 05期

关键词：

D O I：

10.1007/BF01177469

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

[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. © 1990 Chapman and Hall Ltd.

引用

页码：394 / 398

页数：5

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