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Showing papers in "Inorganic Chemistry in 1978"


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1,417 citations


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385 citations


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TL;DR: In this article, the temperature dependence of the magnetic susceptibility and the electron paramagnetic resonance spectra of the thiazole complexes dichloro- and dibromobis(thiazole)copper(II) are reported, along with a complete three-dimensional X-ray structure analysis of the dichlora complex based on counter data.
Abstract: : The temperature dependence of the magnetic susceptibility and the electron paramagnetic resonance spectra of the thiazole complexes dichloro- and dibromobis(thiazole)copper(II) are reported, along with a complete three-dimensional X-ray structure analysis of the dichloro complex based on counter data. The dichloro complex, Cu(C3H3NS)2C12, crystallizes in space group of the monoclinic system with two independent formula units in a cell of dimensions a = 7.332(6), b = 3.853(4), c = 17.493(17) angstrom, and Beta = 93.70(1). The structure has been refined by full-matrix least-squares methods using 1172 independent data to a final value of the conventional R-factor (on F) of 0.028. The structure, which consists of infinite chains of doubly chloride bridged copper(II) ions, is reminiscent of those of the pyridine analogs, with a Cu-Cu separation of 3.853(4) angstrom and bridging angle of 91.89(2). The magnetic data and interchain exchange interactions are discussed in the light of the structural properties of the systems.

319 citations


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245 citations


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187 citations


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174 citations


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164 citations


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155 citations


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TL;DR: The Raman spectra of AlCl3:1-butylpyridinium chloride liquids at ambient temperatures have been recorded for the 0.75:1.0 to 2.0 molar composition range, respectively.
Abstract: : The Raman spectra of AlCl3:1-butylpyridinium chloride liquids at ambient temperatures have been recorded for the 0.75:1.0 to 2.0:1.0 molar composition range, respectively. Four absorption bands for AlCl4- ionic species were assigned on the basis of higher temperature vibrational spectral results of AlCl3:alkali metal chloride systems.

145 citations


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138 citations


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TL;DR: In this paper, the Sjradical anion was identified as the blue species present in hexamethylphosphoramide and dimethylformamide solutions of alkali polysulfides and in ultramarine blue.
Abstract: The characterization of the Sjradical anion as the blue species present in hexamethylphosphoramide and dimethylformamide solutions of alkali polysulfides and in ultramarine blue has been extended by the measurement of the depolarization ratios for the two a l bands of the ion, by the observation of two distinct resonance Raman progressions for the ion in solution, by the calculation of the S-S-S bond angle and the force constants for the ion, and by the estimation of the S-S bond length in the ion. The vibrational spectra of the red species formed by adding sulfur to blue solutions of Na2S4 in dimethylformamide are reported; the red species is thought to be the Sc radical anion. Both the Sc and S3radical anions have been identified as the species responsible for the color of ultramarine green. Oxidation of the latter to ultramarine blue is associated with an increase in the S3-/S< ratio. The force constants, harmonic frequencies, and anharmonicity constants of both the S c and S3radical anions are compared with those of other isoelectronic or effectively isoelectronic species. The resonance Raman spectrum of ultramarine red reveals the presence of the S3and S r radical anions together with a third, predominant species which may be the neutral Sq molecule.

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TL;DR: In this paper, the tetravalent transition metals of the left side of the periodic table are prepared via a simple metathetical reaction: TX/sub 4/ + 2A/sub 2/S..-->.. TS/sub 1/ + 4AX.
Abstract: By use of nonhydroxylic solvents, the series of disulfides of the tetravalent transition metals of the left side of the periodic table are preparable via a simple metathetical reaction: TX/sub 4/ + 2A/sub 2/S ..-->.. TS/sub 2/ + 4AX. The crystallinity of the product TS/sub 2/ depends upon T and the conditions of the reaction, and particle sizes are in the submicron range. New amorphous phases have been found. The reactivity of these materials, in particular their intercalative behavior, is contrasted with those prepared by conventional high-temperature procedures. In certain cases, it is possible to obtain dispersions of TS/sub 2/, showing the effect of solvent.

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TL;DR: In this paper, the authors present a new 2-bzw. 4kernigen Dianionen isolierbar in the form of a R4 N-Salze isolier bar.
Abstract: Die Komplexe (I) bzw. (V) reagieren mit den Benzoylhalogeniden (II) in AcCN glatt zu den neuen 2- bzw. 4kernigen Dianionen (III) bzw. (VII), die in Form ihrer R4 N-Salze isolierbar sind.

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TL;DR: In this article, the forward (k/sub 1/ = 1.1 x 10/sup 7/s/sup -1/) and reverse (k /sub -1/= 1.0x 10/Sup 7/S/s /sup - 1/) intersystem crossing rate constants for the dynamic spin-interconversion process in (Fe((py)imH)/sub 3/)/sup 2 +/.
Abstract: Contrary to previous reports, the tris(2-(2-pyridyl)imidazole)iron(II) ((Fe((py)imH)/sub 3/)/sup 2 +/) and tris(2-(2-pyridyl)benzimidazole)iron(II) ((Fe((py)bimH)/sub 3/)/sup 2 +/) cations have been shown to be spin-equilibrium species in solution by variable-temperature magnetic and electronic spectral studies. Laser Raman temperature-jump kinetics has been used to directly measure the forward (k/sub 1/ = 1.1 x 10/sup 7/s/sup -1/) and reverse (k/sub -1/ = 1.0 x 10/sup 7/s/sup -1/) intersystem crossing rate constants for the dynamic spin-interconversion process in (Fe((py)imH)/sub 3/)/sup 2 +/. The results are compared to similar kinetic data available for other iron(II) spin-forbidden/conversion processes in bis(pyrazolylborate)iron(II) and (Fe(6-Mepy)/sub n/(py)/sub m/tren)/sup 2 +/. 2 tables, 3 figures, 36 references.

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