摘要:

Normal coordinate analyses were performed for Fe2Cl6and AlFeCl6on the basis of new Raman data. Calculated mean amplitudes of vibration are reported.

ISSN:0038-7010    

DOI:10.1080/00387018908053854

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

The Raman CH Stretching spectra of 12C4 in water solution, for temperatures from 5 to 80 °C, are studied. For the first time, Fourier deconvolution technique is applied to resolve the overlapped components in the corresponding isotropic and anisotropic spectra. The results are treated by means of a model. explaining the variety of resolved components with a splitting of the unperturbed CH stretching vibration. owing to intramolecular interactions. The temperature behaviour of the coupling constants of these interactions is discussed.

ISSN:0038-7010    

DOI:10.1080/00387018908053855

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Two Dimensional COSY and HETCOR experiments have been performed on the alkaloid vindoline which allow the complete1zH and13C spectral assignments to be made. Proton-proton and proton-carbon coupling constants are also given.

ISSN:0038-7010    

DOI:10.1080/00387018908053856

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A simple and fast analytical method for the determination of the title compounds (BZQ and TZL) by derivative UV spectrophotometry, in ethanol, is described.

ISSN:0038-7010    

DOI:10.1080/00387018908053857

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A very simple and fast analytical method to determine the degradation level of p-Aminosalicylic acid by UV spectrophotometry was described. The method allows also the simultaneous determination of the drug and its major degradation product, m-Aminophenol.

ISSN:0038-7010    

DOI:10.1080/00387018908053858

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

The partition ofcis-platinum between a mixture of DNA and RNA as well as transport of DNAcis-platinum complexes via synthetic membranes were studied using atomic absorption and mass spectrometry.

ISSN:0038-7010    

DOI:10.1080/00387018908053859

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

A thermospray was used as a metal preconcentration device for flame AAS. With 1.0 mL of sample loading, the AA signal was increased about 15 times and with 2.0 mL of sample loading the signal was increased about 30 times compared to a thermospray flame system and more than two order of magnitude compared to a normal flame system.

ISSN:0038-7010    

DOI:10.1080/00387018908053860

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

An influence of the distance of measured points on results of Savitzky-Golay method of spectral contour differentiation was investigated. Some conclusions based on the differentiation of electronic absorption spectra with vibronic structure were formulated.

ISSN:0038-7010    

DOI:10.1080/00387018908053861

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

In acetonitrile solutions, the exchange reaction is bimolecular in the Tl++ 18C6 system, while in the Tl++ pentaglyme system the associative-dissociative and the bimolecular mechanisms coexist at room temperature and the bimolecular exchange reaction dominates at 263° K. For the bimolecular mechanism in the case of Tl++ 18C6 and the associative-dissociative mechanism in the case of Tl++ pentaglyme, the activation energies of the exchange reactions change with temperature. At 298° K, in the Tl++ 18C6 system the activation energy for the bimolecular exchange reaction is ≈ 2 kcal.mol−1and exchange rate constant (k1) is (4.1 ± 0.1) × 107s−1mol−1; in the Tl++ pentaglyme system, the activation energy for the associative-dissociative exchange reaction is ≈ 5 kcal mol−1and the decomplexation rate constant (k−2) is (2.2 ± 0.4) X 105s−1. The activation energy for the bimolecular exchange in the Tl++ pentaglyme system was determined to be 3.00 ± 0.05 kcal.mol−1and the exchange rate constant (3.0 ± 0.1) X 108s−1mol−1.

ISSN:0038-7010    

DOI:10.1080/00387018908053862

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

An analytical proton magnetic resonance (PMR) spectroscopic method was developed for the determination of etilefrine hydrochloride [943–17–9] in bulk, I, tablets, II, drops, III, and injectables, IV,. The method is advantageous over those in the literature offering a fast, simple, specific, and accurate procedure.

ISSN:0038-7010    

DOI:10.1080/00387018908053863

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor