摘要:

The crystal structure of potassium hydrogen oxalate, KHC2O4, has been determined by Pedersen1. There are infinite chains of hydrogen oxalate ions held together by short (2. 534 Å) hydrogen bonds. The O-D‥O distance of KDC2O4derived from lattice constant changes is estimated to be about 0.005 Å larger than the O-H‥O distance which means that the isotope effect is small1. We believe, however, on the ground of the infrared and Raman spectra of KHC2O4and KDC2O4repotted in this paper, that the isotope effect in these crystals is much larger.

ISSN:0038-7010    

DOI:10.1080/00387017108078634

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

During the course of studies of the vibrational spectra of type molecules, it was found that differences in the results of force constant calculations were obtained by various workers. This diversity in results can be attributed not only to differences in frequency assignments and in assumed force fields, but also in choice of coordinates. The present note deals with the two different sets of symmetry coordinates in common use by various authors for ethylene-type molecules.

ISSN:0038-7010    

DOI:10.1080/00387017108078635

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

Examination of the Infrare and Raman spectra ofcis,cis-dipropenyl ether (which was produced by isomerization of diallyl ether) has produced evidence for strong vibrational coupling between the two double-bonds. This ether has strong bands it 1655 cm−1in the infrared and at 1691 cm−1in the Raman. The 1658 cm−1band in the Raman is about 10 fold less intense than the strong polarised band. Thus it appears reasonable to associate the strong IR and Raman bands with the asymmetric and symmetric vibrations shown.

ISSN:0038-7010    

DOI:10.1080/00387017108078636

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

The data available in literature on the vibration spectra of complex uranyl compounds indicate that the stretching vibration frequencies of the UO2+2group depend not only on the composition of the coordination sphere, but also on the outer surrounding of the complex anion. The outer-sphere cation, in case of uranyl complexes, acts as a competitor of the uranyl group to form bonds with, ligands. At the same time, as a result of decrease in the electron density localised on the U-F bonds, the strength of these bonds becomes less.

ISSN:0038-7010    

DOI:10.1080/00387017108078637

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor

摘要:

The ether-wave theory of light, suitably modified, is fully supported by all known evidence. Further observation and analysis will be required to determine which of its several forms accurately represents reality. On the other hand, the tactile theory, the Newtonian corpuscular theory, the Ritz extinction theory, and the Special Theory of Relativity are not supported by the evidence.

ISSN:0038-7010    

DOI:10.1080/00387017108078638

出版商:Taylor & Francis Group    

年代:1971

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:10.1080/00387017108078633

出版商:Taylor & Francis Group    

年代:1971

数据来源: Taylor