The nature of the blue isomer of Ni(1,2-diaminoethane)2(NO2)2

Hitchman, Michael A.; James, Greg

doi:10.1016/s0020-1693(00)83584-7

Cited by 11 publications

(2 citation statements)

References 21 publications

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“…In particular, one of the NO 2 - ions leaves the coordination sphere, while the other chelates the Ni II center with the two oxygen atoms. A similar structural rearrangement had been proposed for the Ni II (ethylenediamine) 2 (NO 2 ) 2 complex ), supporting the mechanism of the simultaneous rotation of the two NO 2 - ions.…”

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confidence: 76%

Molecular Motions in the Solid State: the Thermochromic Nitro−Nitrito Interconversion in Nickel(II) Bis(diamine) Complexes

et al. 2003

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The NO(2)(-) ion, in the trans-octahedral [Ni(II)(N,N'-dimethylethylenediamine)(2)(NO(2))(2)](H(2)O) complex, coordinates the metal through the nitrogen atom (nitro form). On heating the solid complex, the anion rotates to give nitrito coordination (oxygen bound), according to a reversible process. The coordination mode of NO(2)(-) to Ni(II) is related to the steric interplay between the anion and the alkyl substituents on the diamine.

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confidence: 76%

Molecular Motions in the Solid State: the Thermochromic Nitro−Nitrito Interconversion in Nickel(II) Bis(diamine) Complexes

et al. 2003

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“…The reversible change from the low-temperature red form to the hightemperature blue form of Nienz(NOz) 2 occurs at 383-423 K. According to Hitchman [3], the blue isomer contains one chelating and one ionic nitrite per metal. Microscopic observations showed that a very distinct reaction front moves across the crystal, parallel to the crystal edges [4] (Fig.…”

Section: Linkage Isomerization In Nien2(no2)mentioning

confidence: 99%

Kinetic-morphological peculiarities of solid-state isomerization of complexes

Шахтшнейдер

Ivanov

Болдырев

1988

Journal of Thermal Analysis

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The thermal solid-state isomerizations of Copy2Cl 2 (py = pyridine), Nien2(NO2) 2 and Nien2(NCS) 2 (en = ethylenediamine) were studied by thermal analysis, thermomieroscopy, Xray diffraction and IR-speetroscopy. It was shown that the reactions proceed by nuclear formation and growth. The kinetic-morphological peculiarities of the processes suggest that the process-determining stage is a phase Stage, i. e. structural transformation. The topography and kinetics of processes are therefore determined by the crystal structures of the initial material and the reaction product, and by the contact conditions at the interface. The stress relaxation processes affect the morphology of the products and the kinetics of the transformation.In recent years an increasingly large number of investigations involving solidstate isomerizations of coordination compounds have been reported. On the basis of kinetic and structural studies, the mechanisms of these processes have been proposed in some cases. However, little has been accomplished as regards the topochemistry of these reactions.This report presents a brief summary of research on the topochemical peculiarities (topography, kinetics and product morphology) of the thermal solidstate isomerizations of certain Co(II) and Ni(II) complexes: Copy2Cl 2 (py = pyridine), NienE(NO2) 2 (en = ethylenediamine).

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ChemInform Abstract: THE NATURE OF THE BLUE ISOMER OF BIS(1,2‐DIAMINOETHANE)NICKEL NITRITE

Hitchman¹,

James²

1984

Chemischer Informationsdienst

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The nature of the blue isomer of Ni(1,2-diaminoethane)2(NO2)2

Cited by 11 publications

References 21 publications

Molecular Motions in the Solid State: the Thermochromic Nitro−Nitrito Interconversion in Nickel(II) Bis(diamine) Complexes

Molecular Motions in the Solid State: the Thermochromic Nitro−Nitrito Interconversion in Nickel(II) Bis(diamine) Complexes

Kinetic-morphological peculiarities of solid-state isomerization of complexes

ChemInform Abstract: THE NATURE OF THE BLUE ISOMER OF BIS(1,2‐DIAMINOETHANE)NICKEL NITRITE

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