caa a22 4500 465776027 CHVBK 20180323111942.0 cr unu---uuuuu 170327e19901001xx s 000 0 eng 10.1007/BF01177469 doi (NATIONALLICENCE)springer-10.1007/BF01177469 Solid state thermal isomerisation of diethylenetriamine complexes of NiX2 (X=NO3, ClO4, BF4 and CF3SO3) [Elektronische Daten] [Subratanath Koner, Ashutosh Ghosh, Nirmalendu Chaudhuri] Summary: [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. Chapman and Hall Ltd., 1990 Koner Subratanath Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 700 032, Calcutta, India aut Ghosh Ashutosh Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 700 032, Calcutta, India aut Chaudhuri Nirmalendu Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 700 032, Calcutta, India aut Transition Metal Chemistry Kluwer Academic Publishers 15/5(1990-10-01), 394-398 0340-4285 15:5<394 1990 15 11243 https://doi.org/10.1007/BF01177469 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01177469 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Koner Subratanath Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 700 032, Calcutta, India aut NATIONALLICENCE 700 1- Ghosh Ashutosh Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 700 032, Calcutta, India aut NATIONALLICENCE 700 1- Chaudhuri Nirmalendu Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 700 032, Calcutta, India aut NATIONALLICENCE 773 0- Transition Metal Chemistry Kluwer Academic Publishers 15/5(1990-10-01), 394-398 0340-4285 15:5<394 1990 15 11243 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer