Thermal investigation of nickel(II) diamine complexes in solid state.

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概要

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• Three tris(ethylenediamine)nickel(II) chloride dihydrate having identical composition, apparently similar in color, magnetic moment and spectral properties showed differences in thermal profile. Thermal investigations of [Ni(en)<SUB>3</SUB>]Br<SUB>2</SUB>·2H<SUB>2</SUB>O, [Ni(tn)<SUB>3</SUB>]Cl<SUB>2</SUB>·2H<SUB>2</SUB>O, and [Ni(tn)<SUB>3</SUB>]Br<SUB>2</SUB>·H<SUB>2</SUB>O where en=ethylenediamine and tn=1,3-propanediamine were carried out. Several bis and mono(diamine) complexes were synthesized in solid state from the corresponding tris complexes. All the bis and mono(diamine) complexes were found to be O<SUB>h</SUB> hand T<SUB>d</SUB> symmetry respectively. All tris(diamine) complexes generate <I>cis</I> bis(diamine) species upon heating. But only one tris(ethylenediamine)nickel(II) chloride dihydrate generates <I>cis</I> bis species by the isomerization from the <I>trans</I> species temporarily formed. Monodiamine complexes decomposed through [Ni<SUB>2</SUB>(diamine)Cl<SUB>4</SUB>] species which showed unusually high magnetic moment. The probable mechanistic path for each step of decomposition was also reported.

• 公益社団法人 日本化学会の論文

著者

• Chaudhuri Nirmalendu

  Department Of Inorganic Chemistry Indian Association For The Cultivation Of Science.

• Biswas Prasanta

  Department of Chemistry, Jadavpur University

• De Goutam

  Department of Chemistry, Faculty of Science, Kanazawa University

関連論文

• Preparation, Characterization, and Solid State Thermal Studies of Nickel(II) Squarate Complexes of 1,2-Ethanediamine and Its Derivatives
• Thermal studies of 1,2-propanediamine complexes of zinc(II) and cadmium(II) in the solid phase.
• Thermal investigation of nickel(II) diamine complexes in solid state.
• Thermal studies of nickel(II) hydrazine complexes in solid state.
• Some unusual phase transitions of nickel(II) diamine complexes.
• Activation parameters of bromoacetate-thiosulfate reaction in ethylene glycol-water mixtures.
• Cis-to-trans isomerization of bis(diamine)bis(isothiocyanato)chromium(III) thiocyanate in the solid state.

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