摘要:

Comparative experimental study of the gas pyrolysis induced by CO2laser radiation at 10.6 μm and by heating fo thrichlorethylene and oxygen has been performed. The analysis of the reaction products does not indicate any difference between two techniques of pyrolysis in the range of pressures 100–760 torr.

ISSN:0038-7010    

DOI:10.1080/00387018108062563

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

The13C NMR spectra and31P -13C coupling for six phosphoranylidene benzamides, including three compounds which do not appear to have been previously described in the chemical literature, are reported. A previous shift assignment for the triphenyl phosphoranylidene compound has been revised.

ISSN:0038-7010    

DOI:10.1080/00387018108062564

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

The binding energies (Eb) of the Br (3P3/2) level have been recorded for some bromine compounds to characterize the relation between Eband the atomic charge qBr. As an internal standard the Clsbinding energy of the carbons of incorporated phenyl groups have been used. From this relation the charges on the metal atoms in FeBr−4, CoBr2-4, NiBr2-4have been estimated as +1.0, +0.7 and +0.9, respectively.

ISSN:0038-7010    

DOI:10.1080/00387018108062565

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Usually every research worker concerned with the synthesis of new compounds experinces difficulties in their identification due to the lack of certain literature data. Commonly available correlation tables of group frequencies in oscillation spectra and of chemical shifts in the1H-NMR spectra provide only a generation information and do not allow to precisely determine the structure of compounds. The1H-NMR spectra have become the main source of structural informations. However, catalogs and correlation tables of the spectra require actualization. For this reason general data on chemical shifts of protons in new compounds, particularly of protons at hetero atoms, appear to be always useful.

ISSN:0038-7010    

DOI:10.1080/00387018108062566

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Raman and far infrared spectra (in the frequency range 40–360 cm−1) have been recorded for polycrystalline samples of eight crystals having the cadmium chloride layered structure. The four fundamental zone-center vibrational frequencies are assigned for CdCl2, MgCl2, MnCl2, NiCl2, CdBr2and NiBr2.

ISSN:0038-7010    

DOI:10.1080/00387018108062567

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Previous measurements of the binding constants of the lanthanide reagent, Eu(thd)3, with (mainly) open chain ketones showed that moderately strong complexes were formed1,2. We have now extended these studies using nine alicyclic ketones to examine the effects of ring size and carbonyl conjugation. The influence of Europium and Ytterbium fluroinated shift reagents on five ethers and epoxides is also discussed.

ISSN:0038-7010    

DOI:10.1080/00387018108062568

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

In this paper we present a fast method of simulation of the normalized second factorial moment n(2)(T) of the photon-counting distribution obtained in an intensity fluctuation spectroscopy experiment, in order to test the confidence with which one can derive information from such measurements.

ISSN:0038-7010    

DOI:10.1080/00387018108062569

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

The optical and EPR spectra in single crystals of copper-doped in Zn, Cd, Hg fluoride ethylendiaminates have been recoreded at room and liquid nitrogen temperatures. The parameters in the spin Hamiltonian are found. Two d-d transition were observed at 15925 and 17450 sm−1. The molecular orbital coefficients are calculated.

ISSN:0038-7010    

DOI:10.1080/00387018108062570

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Infrared intensities of fundamental and first overtone bands of O-H stretching mode of methanol are reported in a few hydrogen bonding solvents. From these intensity data the first and second dipole moment derivatives have been computed. It is noticed that the intensity of the fundamental band increases appreciably on hydrogen bonding whereas the first overtone does not show much change in intensity. Two sets of dipole moment derivatives obtained from ++ and -+ combinations of the transition moment matrix elements R10and R20are considered, the values for – and -+ combinations are equal in magnitude to those of ++ and +- combinations respectively and opposite in signs. It is observed that in all the case studied both the dipole moment derivatives of O-H bond increase on hydrogen bonding. It is shown that with an increase in the values of both the dipole moment derivatives not only one can explain an appreciable increase in

ISSN:0038-7010    

DOI:10.1080/00387018108062571

出版商:Taylor & Francis Group    

年代:1981

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:10.1080/00387018108062562

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor