Infrared spectra of thorium-carbonate complex salts

A. V. Karyakin; M. P. Volynets

doi:10.1007/bf00744135

Infrared spectra of thorium-carbonate complex salts

Journal of Structural Chemistry ◽

10.1007/bf00744135 ◽

1962 ◽

Vol 3 (6) ◽

pp. 689-690 ◽

Cited By ~ 1

Author(s):

A. V. Karyakin ◽

M. P. Volynets

Keyword(s):

Infrared Spectra ◽

Carbonate Complex ◽

Complex Salts

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Low-temperature far-infrared spectra of hexanitro complex salts

Inorganic Chemistry ◽

10.1021/ic50065a016 ◽

1968 ◽

Vol 7 (7) ◽

pp. 1332-1337 ◽

Cited By ~ 18

Author(s):

Ichiro Nakagawa ◽

Takehiko Shimanouchi ◽

Kazuo Yamasaki

Keyword(s):

Low Temperature ◽

Infrared Spectra ◽

Far Infrared ◽

Complex Salts ◽

Far Infrared Spectra

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Reactions of 7-azaindole with niobium and tantalum pentachlorides and coupling to the azaindolyl-azaindolium cation

Canadian Journal of Chemistry ◽

10.1139/v94-211 ◽

1994 ◽

Vol 72 (7) ◽

pp. 1675-1683 ◽

Cited By ~ 10

Author(s):

Jacques Poitras ◽

André L. Beauchamp

Keyword(s):

Infrared Spectroscopy ◽

Nmr Spectroscopy ◽

Crystal Structures ◽

Infrared Spectra ◽

Oxidative Coupling ◽

Room Temperature ◽

H Nmr ◽

Counter Ion ◽

Distorted Octahedral ◽

Complex Salts

The reaction of NbCl5 and TaCl5 with 7-azaindole (Haza) at room temperature in benzene or dichloromethane yielded MCl5(Haza) addition compounds. Under more severe conditions, the same compound was obtained with TaCl5. For NbCl5, some reduction to Nb(IV) was observed and NbCl5(Haza), NbCl4(Haza)2, and the (H2aza)+ ion were identified in the reaction mixture by infrared spectroscopy. Oxidative coupling of two azaindole units via N7—C6 also took place during the reaction, since the 7-(azaindol-6-yl)azaindolium cation was found as counter-ion in the crystal structures of two complex salts. In the crystals of (H2aza-aza)[NbOCl4(Haza)]•0.5CH2Cl2([Formula: see text]a = 7.255 Å, b = 12.412 Å, c = 14.277 Å, α = 89.03°, β = 85.60°, γ = 76.66°, Z = 2, R = 0.062), the anion is the roughly octahedral [NbOCl4(azaindole)]− species containing a neutral N7-coordinated azaindole trans to the Nb=O bond. The [NbOCl5]2− salt ([Formula: see text]a = 7.527 Å, b = 10.168 Å, c = 10.467 Å, α = 66.41°, β = 84.07°, γ = 85.51°, Z = 1, R = 0.037) contains the distorted octahedral [NbOCl5]2− ion disordered over two orientations. The infrared spectra suggest monomeric octahedral structures for the MCl5(Haza) and NbCl4(Haza)2 complexes. 1H NMR spectroscopy shows that NbCl5(Haza) is not dissociated in CD2Cl2.

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