摘要:

The relationship between the collision cross-sectional area of the gaseous sample ions determined from the plasma chromatograph and the cross-sectional area of their corresponding molecules in the liquid phase is given. From this relationship, the unknown densities of various compounds can roughly be determined from the plasma chromatographic measurements. Also, the mobilities of the ions can be estimated for those compounds with known densities.

ISSN:0038-7010    

DOI:10.1080/00387017508067363

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

It has been described in the literature1that the protonation of the nitrogen in 1-benzyl-1,2,3,4-tetraisoquinoline derivatives does not affect the sign of the ORD spectra. We have recently observed2that in the case of several (R) and (S) N-methyl-4-phenyl-1,2,3,4-tetrahydroisoquinol ine derivatives this is true only for the three Cotton effects below 300 nm (the1Lb,1Laand1B electronic transitions3of the aromatic moiety), although appreciable variations in intensity and slight shifts in the positions of the extrema were also noticed. On the other hand, the sign of the rotation in the visible spectral range was reversed upon protonation in 0.1N methanolic HCl (or hydrochloride of1in methanol).

ISSN:0038-7010    

DOI:10.1080/00387017508067364

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor

摘要:

Pertechnetyl fluoride, TcO3F, had been prepared some years ago1, but its vibrational spectrum was only recently recorded and interpreted2. The spectroscopic study reveals that, as expected, TcO3F posseses C3vsymmetry, and the values found for the fundamental vibrations are in good agreement with those previously estimated by Müller et al.3in a paper concerning with the vibrational behaviour of MO3Xn−species, and some systematic relations among them (cf. also4).

ISSN:0038-7010    

DOI:10.1080/00387017508067365

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:10.1080/00387017508067352

出版商:Taylor & Francis Group    

年代:1975

数据来源: Taylor