摘要:

The aim of this report is to demonstrate that the combination bands of NH2are useful to compare the association interactions of the NH2group of primary aliphatic amines with the recognized weak proton donor solvents, chloroform and isopropyl alcohol for example and with the weaker π-electron donors benzene and pyridine, for example. Examples of families of isosbestic curves characteristic of typical equilibrium reactions of an amine with the complexing solvents are presented including the proton donor-acceptor system, 4-phenylbutylamine with benzene.

ISSN:0038-7010    

DOI:10.1080/00387017508067319

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

The1H-NMR spectra of meso-cis- and racemic-transtetralenediols-2,3 are in agreement with the differences in the structures of the isomeric cis- and trans-diols.1

ISSN:0038-7010    

DOI:10.1080/00387017508067320

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Infrared spectra of rat tissues, RNA tumor virus (Rauschler) and pure RNA and DNA are examined by the technique of frustrated multiple internal reflection (FMIR). An attempt has been made to characterize biologically important tissue components on the basis of infrared spectral analysis and published literature on the subject.

ISSN:0038-7010    

DOI:10.1080/00387017508067321

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

One of the major arguments against using trace metal characterization as a tool to identify oil spills is lack of reliability of the data. With this in mind, the precision of flameless atomic absorption spectroscopy and of neutron activation analysis was determined for vanadium in crude oil residues. Thirty crude oil residues (beach asphalts) were analyzed by both methods, and the results compared. For neutron activation analysis, the population mean was 195 ppm, and the standard deviation of the method was 5.38 ppm. For flameless atomic absorption spectroscopy, the population mean was 202 ppm, and the standard deviation 19.5 ppm.

ISSN:0038-7010    

DOI:10.1080/00387017508067322

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Ultraviolet spectroscopic characterization of influence of mesyl group in 2-mesyloxy-3-carboxy-naphthalene and its 1-allyl substituted derivative is given. The quasinaphthoquinonoid-2,3 structure is taken into consideration.

ISSN:0038-7010    

DOI:10.1080/00387017508067323

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

A reinvestigation of the electronic spectrum of BiF, has revealed the presence of a new system of bands, degraded to longer wavelengths, in the region λ6200-λ7000 Å. The band heads could be represented by the following vibrational quantum formula.

ISSN:0038-7010    

DOI:10.1080/00387017508067324

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Heretofore, it has been assumed that the Rydberg (3s) doublets appearing in the absorption spectrum of ethylene derive their intensity from dipole allowedness. This mechanism is consistent with a vibrational assignment of the spacing between members of the doublet pairs as methylene twisting,v′4, in the R state. Herein is presented an analysis based on the assumption that the Rydbergs derive intensity via vibronic stealing from the underlying V → N band. This mechanism presents, for the first time, an explanation for the doublet nature of the Rydbergs by offering two tenable vibrational modes through which intensity stealing can occur-v′8andv′4+v′10. This predicts a doublet spacing ofv′4+v′10-v′8, which provides excellent agreement between ground and excited state isotopic ratios (C2D4against C2H4), namely, 0.595 in N versus 0.594 in R. Predictions are made as to the positions of the dipole allowed bands, as well as the values ofv′2,v′4,v′6andv′10in the R states of C2H4and C2D4.

ISSN:0038-7010    

DOI:10.1080/00387017508067325

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0038-7010    

DOI:10.1080/00387017508067318

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor