摘要:

The band system in the region 2700–3100Å, attributed to the B-X transition of the SiCl molecule, has been excited in a hydrogen cum argon shock tube. The enrgy transfer during the shock wave is 4·8 ev which corresponds to a pressure ratio about 380. Seven new bands, 1–1, 2–1, 2–3, 2–4, 2–5, and 3–1 are identified. Molecular constants are obtained from vibrational analysis as well as from least squares fitting of polynomials corresponding to band progressions.

ISSN:0038-7010    

DOI:10.1080/00387018108062556

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

Six membered alicyclic ketones substituted at 2- and 6- positions have been reported to undergo conformational changes during oximation.2–4For example,cis-2, 6-dimethyl-cyclohexanone gave predominantly an oxime with two methyl groups in the diazial orientation.4The oximation of 1-methyl-cis-3, 5-diphenyl-4-piperidone in which the bulky phenyl groups were in diequatorial configuration led to an oxime having a trans configuration (axial-equatorial C-phenyl bonds). Facile epimerization at the 3, 5- positions appears to be possible in these cases due to the

ISSN:0038-7010    

DOI:10.1080/00387018108062557

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

A method for constructing a complete set of independent symmetry coordinates for the in-plane vibrations of any polycene is given. Calculated vibrational frequencies from the previously developed five-parameter force field are given for naphthacene, hexacene and octacene. Those of napthacene and octacene. Those of napthacene are compared with experimental data. For hexacene and octacene the calculated mean amplitudes of vibration at 298 K for the bonded CC distances are reported.

ISSN:0038-7010    

DOI:10.1080/00387018108062558

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

The simple five-parameter force-field approximations were applied to phenathrene. The frequencies of both in-plane and out-of-plane molecular vibrations were calculated and found to agree well with experimental data. The mean amplitudes of vibration at 298 K are reported.

ISSN:0038-7010    

DOI:10.1080/00387018108062559

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

The dependence of the Intensity and the half-width of several spectral lines on the discharge current and the radiation power has been studied. The experiments have been carried out with spectral lines of Zn, Cd, Na, Pb and Hg, radiated by different sources of light (hollow-cathode lamps (HCL) with d.c. power supply; electric discharge lamps (EDL) with h.f. power supply; metal-vapour discharge lamps (MVDL) with a.c. power

ISSN:0038-7010    

DOI:10.1080/00387018108062560

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor

摘要:

The flash photolysis of phosphorus trichloride vapour under isothermal conditions yielded two systems of absorption bands of PCl (C←X and B←X) in the ultraviolet region (224–249 nm), all bands being degraded to shorter wavelengths. The C←X system is reported for the first time. Under adiabatic conditions no transient bands were detected. Additional

ISSN:0038-7010    

DOI:10.1080/00387018108062561

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:10.1080/00387018108062555

出版商:Taylor & Francis Group    

年代:1981

数据来源: Taylor