Spectrochimica Acta最新文献_第2页

In-plane vibrational frequencies and modified Urey—Bradley force constants of boron trihalides 三卤化硼的面内振动频率和修正Urey-Bradley力常数

Spectrochimica Acta Pub Date : 1966-12-01 DOI: 10.1016/0371-1951(66)80050-4

K. Shimizu, H. Shingu

引用次数: 4

The electron donor ability of fumaronitrile 甲腈的电子给体能力

Spectrochimica Acta Pub Date : 1966-12-01 DOI: 10.1016/0371-1951(66)80063-2

C.H.J. Wells

引用次数: 6

Comments on the vibrational assignments of HBCl2 and HBBr2 HBCl2和HBBr2的振动赋值

Spectrochimica Acta Pub Date : 1966-12-01 DOI: 10.1016/0371-1951(66)80062-0

L. Lynds

引用次数: 3

The ultra-violet spectra of some heterocyclic thioamides and hydrogen bonding 一些杂环硫胺和氢键的紫外光谱

Spectrochimica Acta Pub Date : 1966-12-01 DOI: 10.1016/0371-1951(66)80051-6

Bryan Ellis , P.J.F. Griffiths

{"title":"The ultra-violet spectra of some heterocyclic thioamides and hydrogen bonding","authors":"Bryan Ellis , P.J.F. Griffiths","doi":"10.1016/0371-1951(66)80051-6","DOIUrl":"https://doi.org/10.1016/0371-1951(66)80051-6","url":null,"abstract":"<div>The ultra-violet spectra of thiazoline-2-thione, thiazolidine-2-thione, benzthiazoline-2-thione, 3(N)-methyl-benzthiazoline-2-thione and 2-methyl-thiobenzthiazole in a range of solvents have been determined, solvent effects noted and assignments given for the main absorption bands. The spectra of thiazoline-2-thione and thiazolidine-2-thione are interpreted by their relationship to the spectra of dithiocarbamates, the intense long-wavelength ultra-violet absorption band in the spectra being assigned to an intramolecular charge-transfer transition involving the thioamide grouping. The ultra-violet spectra of benzthiazoline-2-thione and 3(N)-methyl-benzthiazoline-2-thione are related to the spectra of benzthiazole and thioamides. The very intense long-wavelength band in the spectra of these compounds is also assigned to an intra-molecular charge-transfer transition involving the thioamide grouping. The spectrum of 2-methyl-thiobenzthiazole is related to that of benzthiazole and also contains an intense long-wavelength band which is assigned to an intra-molecular charge-transfer transition involving the NCS grouping.The spectrum of benzthiazoline-2-thione in twenty-five solvents is reported and the solvent dependence of the charge-transfer band noted. Blue shifts are observed in hydroxylic solvents where hydrogen bonding from solvent to the thione sulphur atom occurs and red shifts in solvents where the benzthiazoline-2-thione functions as a hydrogen bond donor. In solvents where the compound acts as both a donor and acceptor zero shifts are observed.These conclusions are supported by the studies, in a range of critical solvents, of the spectrum of the N-methyl derivative which can function as a hydrogen bond acceptor only, and hence shows blue shifts only.</div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 12","pages":"Pages 2005-2032"},"PeriodicalIF":0.0,"publicationDate":"1966-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80051-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91694744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 37

Infra-red spectra of sulphamide and sulphamide-d4 磺胺和磺胺-d4的红外光谱

Spectrochimica Acta Pub Date : 1966-12-01 DOI: 10.1016/0371-1951(66)80055-3

T. Uno, K. Machida, K. Hanai

引用次数: 24

The vibrational spectrum of ortho-phosphoric acid in some non-aqueous solvents 正磷酸在非水溶剂中的振动谱

Spectrochimica Acta Pub Date : 1966-12-01 DOI: 10.1016/0371-1951(66)80052-8

R.J. Levene , D.B. Powell , D. Steele

引用次数: 11

Spectroscopic studies of long chain fatty acids. Pyridine—fatty acid—carbon tetrachloride system 长链脂肪酸的光谱研究。吡啶-脂肪酸-四氯化碳体系

Spectrochimica Acta Pub Date : 1966-11-01 DOI: 10.1016/0371-1951(66)80175-3

R.S. Roy

{"title":"Spectroscopic studies of long chain fatty acids. Pyridine—fatty acid—carbon tetrachloride system","authors":"R.S. Roy","doi":"10.1016/0371-1951(66)80175-3","DOIUrl":"10.1016/0371-1951(66)80175-3","url":null,"abstract":"<div>Fatty acids undergo self-association and form 1:1 molecular complexes with pyridine on mixing the ingredients in the low dielectric solvent carbon tetrachloride. Infra-red spectroscopic studies of the pyridine—fatty acid—carbon tetrachloride system confirm the existence of a tautomeric equilibrium involving the ion-paired and non-ion-paired associated complexes in the solution as is represented below:<figure><img></figure>The dimerization constants (KD) for the dimerization equilibria of palmitic and myristic acids in carbon tetrachloride have been estimated by a new method as KD = 1·34 ± 0·2 × 103 mole−1 l (palmitic acid) KD = 1·28 ± 0·2 × 103 mole−1 l (myristic acid).The present study has given the following values for the equilibrium constants of the above equilibria (1).Palmitic acid Myristic acid K1 = 4·6 ± 0·5 K1 = 3·6 ± 0·5 K2 = 2·6 ± 0·5 K2 = 2·0 ± 0·5 KT = 0·57 KT = 0·56The presence of two species of the complex can be explained in terms of a double potential energy curve for the hydrogen bond system.</div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 11","pages":"Pages 1877-1887"},"PeriodicalIF":0.0,"publicationDate":"1966-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80175-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84498312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Vapour and crystal spectra in polarized light of pyrimidine-d0 and pyrimidine-d4 嘧啶-d0和嘧啶-d4的偏振光气相和晶体光谱

Spectrochimica Acta Pub Date : 1966-11-01 DOI: 10.1016/0371-1951(66)80170-4

G. Sbrana, G. Adembri, S. Califano

引用次数: 54

Forbidden transitions in the infra-red spectra of tetrahedral anions—III. Spectra-structure correlations in perchlorates, sulphates and phosphates of the formula MXO4 四面体阴离子-ⅲ的红外光谱禁跃迁。分子式MXO4的高氯酸盐、硫酸盐和磷酸盐的光谱结构相关性

Spectrochimica Acta Pub Date : 1966-11-01 DOI: 10.1016/0371-1951(66)80183-2

A. Hezel, S.D. Ross

引用次数: 199

The vibrational spectra of 1,4-dioxadiene 1,4-二氧二烯的振动谱

Spectrochimica Acta Pub Date : 1966-11-01 DOI: 10.1016/0371-1951(66)80173-X

J.E. Connett, J.A. Creighton, J.H.S. Green, W. Kynaston

引用次数: 22