Structure of penta(dimethylammonium) undecachlorotricadmate(II)

Waśkowska, A.; Lis, Tadeusz; Krzewska, U.; Czapla, Z.

doi:10.1107/s0108270189013156

Cited by 20 publications

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“…A new crystalline compound with composition [(CH 3 ) 2 NH 2 ] 5 Cd 3 Cl 11 (DMACC) has been reported by Czapla et al [1]. X-ray structural investigations have shown that at room temperature the crystal is of orthorhombic symmetry (the space group Cmcm) [2]. There are four formula units in the unit cell.…”

Section: Introductionmentioning

confidence: 91%

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Electronic spectra of [(CH₃)₂NH₂]₅Cd₂CuCl₁₁ crystals

Kapustianik

Batiuk

Czapla

et al. 2004

Physica Status Solidi (b)

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The temperature evolution of Cu 2+ ion environment in the solid solutions of ((CH 3 ) 2 NH 2 ) 5 Cd 2 CuCl 11 is studied on the basis of absorption spectroscopy data. For the detailed analysis of experimental data the special program package Crys Tool 1.0 based on quantum-mechanical models, first of all on the model of normalized spherical harmonics (NSH), has been employed. It has been found that similarly to the crystal of ((CH 3 ) 2 NH 2 ) 5 Cd 3 Cl 11 (DMACC) the investigated solid solution contains tetragonally distorted octahedral metal-halogen complexes of two types and the degree of their distortion is changed considerably at the temperatures of phase transitions (PTs). The parameters of crystal field, angular overlap model, as well as the copper-chlorine distances, show continuous changes at T 1 = 176 K that should be related to the second-order transition, whereas the jump-like anomalies of the spectral parameters at T 2 = 115 K (on cooling) are characteristic of the first-order PTs. Introduction of the copper ions into the structure of the host DMACC crystal induces the shifts of these PTs toward low temperatures by 3.5 and 5 K, respectively. The observed structural changes around T 0 = 313 K are connected with a complex co-operative effect involving weakening of the hydrogen bonds and modification of the Jahn-Teller distortion with temperature.

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Section: Introductionmentioning

confidence: 91%

“…Their longest axes coincide with the [100] direction (octahedron I) and with [110] or [110] for the two polyhedra of the second type (octahedron II). The structure of the [Cd 3 Cl 11 ] 5-anion is presented in [2]. The anionic layers are interlinked by two types of dimethylammonium (DMA) cations.…”

Section: Introductionmentioning

confidence: 99%

Electronic spectra of [(CH₃)₂NH₂]₅Cd₂CuCl₁₁ crystals

Kapustianik

Batiuk

Czapla

et al. 2004

Physica Status Solidi (b)

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“…The anionic layers are interlinked by two types of DMA cations. Some dimethylammonium cations are disordered and the phase transitions are most probably related to the changes of their reorientational freedom [1]. The Raman scattering spectra of DMACC confirm disordering of the dimethylammonium group [2].…”

Section: Introductionmentioning

confidence: 72%

“…Besides, the latter should be comparatively weak. Unfortunately, there are no structural data concerning DMACCC but corresponding data for the "pure" DMACC crystal [1] testify that the N-H. . .Cl bonds are comparatively long (3.288-3.576Å) and therefore would be considered as weak ones.…”

Section: Resultsmentioning

confidence: 99%

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Dielectric and Birefringent Properties of [(CH₃)₂NH₂]₅Cd₂CuCl₁₁Solid Solutions in the Region of Their Phase Transitions

et al. 2006

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On the basis of the optical and dielectric investigations of [(CH3)2NH2]5Cd2CuCl11 solid solutions the existence of phase transitions at T 1 = 175 K and T 2 = 117.5 K was confirmed. Both phase transitions were found to be shifted toward lower temperatures with respect to the corresponding transitions in the "host" [(CH 3 ) 2 NH 2 ] 5 Cd 3 Cl 11 crystals. It was found that the proton conductivity in [(CH3)2NH2]5Cd2CuCl11 crystals is realized through the Grotthus mechanism. The investigations of the birefringent properties confirmed existence of the structural changes at T0 = 320 K connected with the complex co-operative effect involving weakening of the hydrogen bonds and modification of the Jahn-Teller distortion with temperature.

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Condensation of Nickel–Carbonyl Clusters with Soft Lewis Acids: Synthesis and Characterisation of the {Cd₂Cl₃[Ni₆(CO)₁₂]₂}^3– Dimer

et al. 2007

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Reaction of [Ni6(CO)12]2– in thf with 2 equiv. of the softLewis acid CdCl2·2.5H2O gives the new dimeric species {Cd2Cl3[Ni6(CO)12]2}3–. The formation of the latter is not the result of direct addition of CdCl2 to [Ni6(CO)12]2–, but it involves some intermediate species, i.e. [Ni9(CO)18]2– and [Ni9(CO)18Cd2Cl4]2–. The crystal structure of [NBu4]3{Cd2Cl3[Ni6(CO)12]2}·thf was ascertained by X‐ray crystallography. In the solid state, the {Cd2Cl3[Ni6(CO)12]2}3– cluster anions are pillared along the crystallographic c axis, forming infinite columns of perfectly alternating cluster anions and thf molecules. The chemical and electrochemical behaviours of {Cd2Cl3[Ni6(CO)12]2}3– are also reported and compared to those of the parent [Ni6(CO)12]2– dianion.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

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Structure of penta(dimethylammonium) undecachlorotricadmate(II)

Cited by 20 publications

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Electronic spectra of [(CH₃)₂NH₂]₅Cd₂CuCl₁₁ crystals

Electronic spectra of [(CH₃)₂NH₂]₅Cd₂CuCl₁₁ crystals

Dielectric and Birefringent Properties of [(CH₃)₂NH₂]₅Cd₂CuCl₁₁Solid Solutions in the Region of Their Phase Transitions

Condensation of Nickel–Carbonyl Clusters with Soft Lewis Acids: Synthesis and Characterisation of the {Cd₂Cl₃[Ni₆(CO)₁₂]₂}^3– Dimer

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Structure of penta(dimethylammonium) undecachlorotricadmate(II)

Cited by 20 publications

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Electronic spectra of [(CH3)2NH2]5Cd2CuCl11 crystals

Electronic spectra of [(CH3)2NH2]5Cd2CuCl11 crystals

Dielectric and Birefringent Properties of [(CH3)2NH2]5Cd2CuCl11Solid Solutions in the Region of Their Phase Transitions

Condensation of Nickel–Carbonyl Clusters with Soft Lewis Acids: Synthesis and Characterisation of the {Cd2Cl3[Ni6(CO)12]2}3– Dimer

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Electronic spectra of [(CH₃)₂NH₂]₅Cd₂CuCl₁₁ crystals

Electronic spectra of [(CH₃)₂NH₂]₅Cd₂CuCl₁₁ crystals

Dielectric and Birefringent Properties of [(CH₃)₂NH₂]₅Cd₂CuCl₁₁Solid Solutions in the Region of Their Phase Transitions

Condensation of Nickel–Carbonyl Clusters with Soft Lewis Acids: Synthesis and Characterisation of the {Cd₂Cl₃[Ni₆(CO)₁₂]₂}^3– Dimer