摘要:

The suitability of a vidicon TV tube as a detector for atomic absorption spectrometry (AA) was investigated. The spectral response was seen to be adequate throughout the range 217.0-313.8 nm. The instrument was then used as a detector in determining several elements by flame AA, and the results compared favorably with those obtained by a conventional detection system. The system should thus be feasible for simultaneous multielement analysis.

ISSN:0038-7010    

DOI:10.1080/00387017308065467

出版商:Taylor & Francis Group    

年代:1973

数据来源: Taylor

摘要:

The ethylenediamine trmsition metal complexes1-9of the type M(en)2X2(M = Co, Ni, Cu, Pd, Pt and × = I, Br, C1, NO3, C104) have infrared spectra of complicated nature which have been used for the study of conformation of the chelate ring. In dihydrldobis ZnC14 ethylenediamlne transition metal complexes, the hydrogen bonding and the presence of ZnCl4further complicates the vibrational spectra. With a view to study this, the present study of dihydridobis (ethylenedianlne) osnlum tetrachloro zincate was carried out.

ISSN:0038-7010    

DOI:10.1080/00387017308065468

出版商:Taylor & Francis Group    

年代:1973

数据来源: Taylor

摘要:

Bifurans (I-III), bipyrroles (IV-VI), bithiophenes (VII-IX), thienylfurans (X-XIII), thienylpyrroles (XIV-XVII), and furylpyrroles (XVIII-XXI) are isomeric biheterocycles formed from two five-membered ring systems (furan, pyrrole, thiophene) linked together by an essential single bond (∼1.47 Å).

ISSN:0038-7010    

DOI:10.1080/00387017308065469

出版商:Taylor & Francis Group    

年代:1973

数据来源: Taylor

摘要:

The laser Raman spectrum of ferroelectric triglycine sulfate has been determined by the use of an argon ion gas laser. The observed Raman lines are compared with reported assignments in the literature by Taurel1and Krishnan2, Determination of depolarization ratio of the sulfate line at 980 cm−1shows that the Raman band is highly polarizable and the molecular vibration is totally symmetrical v1.

ISSN:0038-7010    

DOI:10.1080/00387017308065470

出版商:Taylor & Francis Group    

年代:1973

数据来源: Taylor

摘要:

The 1-adamantyl group because of its rigid diamondoid st has three chemically distinct sets of protons. When substitu a benzene ring1the chemical shifts of the different sets of would be affected to different extents by the ring current eft the aromatic ring and by the electrostatic field effect3of any proximate electronegative substituent. The nmr spectrum of the 1-adamantyl group of p-adamantyl anisole in chloroform solution sho three broad bands with unresolved fine structure at δ 2.08 (3H, γ protons), δ 1.89 (6H, β protons) and δ 1.75 (6H, δ protons), whereas in the case of o-adamantyl anisole the corresponding spectrum shows two broad bands at δ 2.10 (9H, β and γ protons) and δ 1.77 (6H, δ protons), as shown in the Figure. It is to be noted that the chemical shift of the β-protons of the o-adamantyl group is 0.20 ppm downfield from that of the p-adamantyl group. Clearly, this difference arises from the electrostatic field effect of the methoxyl on the β-protons of the o-adamantyl group. 1-Adamantyl substitution ortho to an electronegative substituent is therefore easily distinguished from the para case on the nmr spectrum.

ISSN:0038-7010    

DOI:10.1080/00387017308065471

出版商:Taylor & Francis Group    

年代:1973

数据来源: Taylor

摘要:

The properties and molecular structure of the metal complexes of Schiff-bases of the type N-alkyl- and N-aryl-salicylaldimine have elicited considerable interest:in particular their vibrational spectra have been the subject of many investigations1,2. Earlier assignments were made empirically, but recently the15N isotopic shift technique has also been used.

ISSN:0038-7010    

DOI:10.1080/00387017308065472

出版商:Taylor & Francis Group    

年代:1973

数据来源: Taylor

摘要:

Recently we studied NQR35Cl and NMR31P spectra of a series of substituted phosphapyrimidines, PhP, (1,2,6-phosphadiazines) and reported some peculiarities of the phosphadiazine ring structure1. Continuing the investigation of this class of compounds, we have obtained in this work infrared and Raman spectra of some PhP and have calculated in-plane normal vibrations. Normal coordinate calculations have been made in order to aid in the assignment of the PhP fundamental frequencies and to obtain values for force constants of the phosphadiazine cycle to transfer to other phosphacyclic compounds.

ISSN:0038-7010    

DOI:10.1080/00387017308065473

出版商:Taylor & Francis Group    

年代:1973

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:10.1080/00387017308065466

出版商:Taylor & Francis Group    

年代:1973

数据来源: Taylor