摘要:

The successive steps of the computer analysis of a NMR spectrum are examined. Better results can be obtained by direct simulation of tentative model spectra. As an example the1H-NMR spectrum of amphetamine is analysed.

ISSN:0038-7010    

DOI:10.1080/00387017508067353

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

The absorption spectrum of UF6between 3400 and 4200 Å, is well-documented,(1–3)but the region below 3400 Å has not been studied in any detail. We present here a spectrum of UF6between 2000 and 4200 Å that shows significant structure below 3400 Å. The absorption in this region must be observed at very low pressures and relatively short path lengths.

ISSN:0038-7010    

DOI:10.1080/00387017508067354

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

The concentrational dependence of Raman spectra of frozen at 77°K naphthalene solutions in cyclohexane and in methanol is studied. An increase in the naphthalene Raman line intensity is observed for the naphthalene-cyclohexane system in a concentrational range in which a quasilinear fluorescence spectrum is recorded.

ISSN:0038-7010    

DOI:10.1080/00387017508067355

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Hanle technique is used for the lifetime measurement of the atomic excited states. Field dependent Hanle signal is Lorentzian under ideal conditions. Any departure from ideal situation is reflected in the shape of the Hanle signal resulting in erroreous measurements. The effect of one such factor, a finite interaction cross section, is discussed here.

ISSN:0038-7010    

DOI:10.1080/00387017508067356

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

The role of quinones in photobiological functions and in biochemical electron-transport processes has been well recognized1. The photoreduction of simple 1,4-benzoquinones in solution has been extensively studied and the mechanism can be represented by the following reactions:

ISSN:0038-7010    

DOI:10.1080/00387017508067357

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Phenanthrene ozonide and methanol combine under acid catalysis to produce a 1:1 adduct, mp 180–181°, assigned structure1on the basis of C-H analysis and infrared spectrum.1,2Although β,β′-dihydroxyalkylperoxides have been isolated from equilibrium mixtures of aldehydes and hydrogen peroxide, they are rarely if ever as thermally stable as the phenanthrene ozonide:methanol adduct.3

ISSN:0038-7010    

DOI:10.1080/00387017508067358

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

The industrial production of phosphorus trichloride is based on the action of chlorine on excessive amounts of phosphorus in the absence of water.

ISSN:0038-7010    

DOI:10.1080/00387017508067359

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

The half-width temperature dependence of various bands from IR spectra of different smectic and cholesteric liquid crystals has been investigated. The activation energy for rotational diffusion Uoτis determined in smectic, cholesteric and isotropic phases. A relationship between the value of Uoτand mesophase stability was found.

ISSN:0038-7010    

DOI:10.1080/00387017508067360

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

It has been shown1–3that the exchange interactions in the dimeric4complex di-μ-(pyridine N-oxide) bis [bisnitrato(pyridine N-oxide) copper(II)], [Cu(pyO)2]2lead to a triplet ground state for the copper(II) pairs. The triplet state epr spectrum has been observed1,3,5,6for a powdered sample of the complex coprecipitated with the corresponding zinc(II) complex, and the computer simulation of this spectrum has been carried out by two different groups3,5,6. As is often the case when dealing with spectra of powdered samples, there exist ambiguities with the spectrum of [Cu(pyO)2-(NO3)2]2since all of the resonances were not observed, and consequently, the interpretation and values of the parameters remain in question. It was felt that examination of the epr spectra of single crystal samples should permit a rigorous analysis of this problem.

ISSN:0038-7010    

DOI:10.1080/00387017508067361

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

The preparation of tetra-μ-benzoatobis[π-cyclopentadienylvanadium-(III)] was recently reported along with other complexes belonging to the general class [π-C5H5V(OOCR)2]. Based on the reduced magnetic moment of the complex and its mass spectrum, a dimeric structure was postulated. The dimeric structure is strongly supported by recent x-ray investigations2,3of very similar carboxylate systems. The epr spectrum of the complex was recently reported;4however, owing to obscuring features (vida post) of the spectrum, the pertinent Spin Hamiltonian parameters were not determined. We report here the simulation of a portion of the epr spectrum from which the magnetic parameters were obtained.

ISSN:0038-7010    

DOI:10.1080/00387017508067362

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor