Spectrochimica Acta最新文献

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Infra-red spectra of some metal acetylacetonates 某些金属乙酰丙酮酸酯的红外光谱
Spectrochimica Acta Pub Date : 1966-09-01 DOI: 10.1016/0371-1951(66)80157-1
Y. Kawasaki, T. Tanaka, R. Okawara
{"title":"Infra-red spectra of some metal acetylacetonates","authors":"Y. Kawasaki,&nbsp;T. Tanaka,&nbsp;R. Okawara","doi":"10.1016/0371-1951(66)80157-1","DOIUrl":"10.1016/0371-1951(66)80157-1","url":null,"abstract":"<div><p>Infra-red spectra of a series of acetylacetonates XX′Sn(acac)<sub>2</sub> (X, X′ = alkyl, aryl and/or halogen), (CH<sub>3</sub>)<sub>2</sub>Pb(acac)<sub>2</sub>, Cl<sub>2</sub>Ti(acac)<sub>2</sub>, Cl<sub>2</sub>Ge(acac)<sub>2</sub> and Cl<sub>4</sub>Sb(acac) have been measured in the region of 4000-400 cm<sup>−1</sup>. The absorption bands in XX′Sn(acac)<sub>2</sub> are classified into three groups. The bands in the first group decrease in frequency with increasing electron attracting power of substituents X and/or X′ and those in the second group show an opposite behaviour. The bands in the third group are almost independent of the substituents. From the substituent dependence of the frequency, the upper strong band in the region of 1600-1500 cm<sup>−1</sup> is assigned to a perturbed CO stretching band and the lower band to a perturbed CC stretching band. The separation of these two bands becomes small as the electron attracting power of substituents increases and in Cl<sub>4</sub>Sb(acac), which may be an extreme case, only a single sharp band is observed. The substituent sensitive bands in XX′Sn(acac)<sub>2</sub> in the region of 700-400 cm<sup>−1</sup> have been found to correspond to metal sensitive bands of usual metal acetylacetonates M(acac)<sub>n</sub> (n = 1, 2, 3 and 4).</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 9","pages":"Pages 1571-1579"},"PeriodicalIF":0.0,"publicationDate":"1966-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80157-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81953072","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: 36
Steric factors affecting hydrogen-bonding between amide groups 影响酰胺基团间氢键的位阻因素
Spectrochimica Acta Pub Date : 1966-09-01 DOI: 10.1016/0371-1951(66)80155-8
R.Lumley Jones
{"title":"Steric factors affecting hydrogen-bonding between amide groups","authors":"R.Lumley Jones","doi":"10.1016/0371-1951(66)80155-8","DOIUrl":"10.1016/0371-1951(66)80155-8","url":null,"abstract":"<div><p>The infra-red spectra of aseries of N-monosubstituted amides R · CONH · R′[R or R′ CH<sub>3</sub>, C<sub>2</sub>H<sub>5</sub>, CH(CH<sub>3</sub>)<sub>2</sub>, C(CH<sub>3</sub>)<sub>3</sub>] in carbon tetrachloride solution have been recorded in the region 3600 cm<sup>−1</sup> −2800 cm<sup>−1</sup>. The shift in the NH stretching frequency on hydrogen—bonding (Δν  ν<sub>monomeric</sub> — ν<sub>associated</sub>) has been found to be proportional to the estimated area (<em>B</em>) of the association band, and to the width at half-height (ν<sub><span><math><mtext>1</mtext><mtext>2</mtext></math></span></sub>) of this band. <em>B</em> was also found to be proportional to the concentration ratio ϱ=<span><math><mtext>C</mtext><msub><mi></mi><mn>associated</mn></msub><mtext>C</mtext><msub><mi></mi><mn>monomeric</mn></msub></math></span></p><p>In a series of secondary amides where R  R′  <em>n</em>-C<sub>3</sub>H<sub>7</sub> to <em>n</em>-C<sub>6</sub>H<sub>13</sub> inclusive, Δν, ν<sub><span><math><mtext>1</mtext><mtext>2</mtext></math></span></sub>, and <em>B</em> were essentially constant.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 9","pages":"Pages 1555-1562"},"PeriodicalIF":0.0,"publicationDate":"1966-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80155-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76710528","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: 18
Intramolecular hydrogen bonding of methoxynaphthoic acids and methyl hydroxynaphthoates 甲氧基萘酸和甲基羟基萘酸的分子内氢键
Spectrochimica Acta Pub Date : 1966-09-01 DOI: 10.1016/0371-1951(66)80153-4
M. Ōki , M. Hirota , S. Hirofuji
{"title":"Intramolecular hydrogen bonding of methoxynaphthoic acids and methyl hydroxynaphthoates","authors":"M. Ōki ,&nbsp;M. Hirota ,&nbsp;S. Hirofuji","doi":"10.1016/0371-1951(66)80153-4","DOIUrl":"10.1016/0371-1951(66)80153-4","url":null,"abstract":"<div><p>Infra-red OH stretching spectra of 2-methoxy-1-naphthoic (I), 1-methoxy-2-naphthoic (II) and 3-methoxy-2-naphthoic (III) acids were measured under conditions where dimeric association and solvent—solute hydrogen bonding could be neglected. From these spectra, together with their ultra-violet spectra, the following conclusions were obtained: (i) The intramolecular hydrogen bond in III is the most favourable, while it is absent in I. This result is in accordance with the conclusion reported previously by the present authors, and can be explained in terms of the steric effect caused by the peri-hydrogen. (ii) The enthalpies of the hydrogen bond formation of II and III are 2·32 and 2·46 kcal/mole, respectively. (iii) Comparison of the ultraviolet spectra of these acids with their esters reveals that there is a remarkable hydrogen bond effect on the spectrum of III.</p><p>The ultra-violet spectra of methyl 2-hydroxy-1-, 1-hydroxy-2- and 3-hydroxy-2-naphthoates were also determined and discussed from the view point of the pseudo-aromatic nature of the chelate ring formed by the intramolecular hydrogen bond.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 9","pages":"Pages 1537-1550"},"PeriodicalIF":0.0,"publicationDate":"1966-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80153-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73267556","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: 8
Mechanism of delayed excimer fluorescence in solution 溶液中延迟准分子荧光的机理
Spectrochimica Acta Pub Date : 1966-09-01 DOI: 10.1016/0371-1951(66)80167-4
C.A. Parker
{"title":"Mechanism of delayed excimer fluorescence in solution","authors":"C.A. Parker","doi":"10.1016/0371-1951(66)80167-4","DOIUrl":"10.1016/0371-1951(66)80167-4","url":null,"abstract":"","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 9","pages":"Pages 1677-1678"},"PeriodicalIF":0.0,"publicationDate":"1966-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80167-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84702308","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: 15
CH-Bindungsmomente und IR-Intensität von Benzol-Derivaten—IV. CH-Valenzschwingungen 2-, 3- und 4-substituierter Pyridinderivate 苯类衍生品的国际互操作性。2、3、4换过的迷幻剂
Spectrochimica Acta Pub Date : 1966-09-01 DOI: 10.1016/0371-1951(66)80165-0
E.D. Schmid, R. Joeckle
{"title":"CH-Bindungsmomente und IR-Intensität von Benzol-Derivaten—IV. CH-Valenzschwingungen 2-, 3- und 4-substituierter Pyridinderivate","authors":"E.D. Schmid,&nbsp;R. Joeckle","doi":"10.1016/0371-1951(66)80165-0","DOIUrl":"10.1016/0371-1951(66)80165-0","url":null,"abstract":"<div><p>Intensity measurements of the CH-stretching vibrations of 40 monosubstituted pyridine derivatives show that also for pyridine derivatives there exists a functional relation between the intensities and the T<span>aft</span> substituent parameters σ<em><sub>I</sub></em>. The interpretation of these facts leads to conclusions concerning the polarity of the CH bond moments of the investigated pyridine derivatives. We also discussed the influence of the hetero—N—atom on the CH bond moments.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 9","pages":"Pages 1645-1658"},"PeriodicalIF":0.0,"publicationDate":"1966-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80165-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77229844","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: 16
Investigations on the microwave spectrum of meta-di-fluoro-benzene 间位二氟苯的微波光谱研究
Spectrochimica Acta Pub Date : 1966-09-01 DOI: 10.1016/0371-1951(66)80154-6
A Rachmant
{"title":"Investigations on the microwave spectrum of meta-di-fluoro-benzene","authors":"A Rachmant","doi":"10.1016/0371-1951(66)80154-6","DOIUrl":"10.1016/0371-1951(66)80154-6","url":null,"abstract":"<div><p>The microwave spectrum of <em>m</em>-C<sub>6</sub><sup>12</sup>H<sub>4</sub>F<sub>2</sub> has been measured from 18·0 to 25·0 GHz with wavemeter and frequency standard techniques, using a Stark modulated gas-absorption, microwave spectrometer. The analysis of the spectrum is based on the rigid asymmetric top theory; the rotational constants and the principal moments of inertia were determined and a preliminary structure of the molecule is given. The results are in agreement with the assumed planarity of the molecule and with normal values of bond distances. The rotational constants are: <em>A</em> = 3739·97 ± 0·3 MHz., <em>B</em> = 1734·95 ± 0·1 MHz., <em>C</em> = 1185·48 ± 0·1 MHz. The inertia defect obtained is <em>I<sub>c</sub></em>  <em>I<sub>a</sub></em>  <em>I<sub>b</sub></em> = −0·11 amuA<sup>2</sup>.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 9","pages":"Pages 1551-1554"},"PeriodicalIF":0.0,"publicationDate":"1966-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80154-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89865558","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: 5
Infrared intensity measurements—II. Chloroethylenes 红外强度测量- 2。氯乙烯
Spectrochimica Acta Pub Date : 1966-09-01 DOI: 10.1016/0371-1951(66)80160-1
J.T. Shimozawa , M.K. Wilson
{"title":"Infrared intensity measurements—II. Chloroethylenes","authors":"J.T. Shimozawa ,&nbsp;M.K. Wilson","doi":"10.1016/0371-1951(66)80160-1","DOIUrl":"10.1016/0371-1951(66)80160-1","url":null,"abstract":"<div><p>The infrared intensities of <em>cis-</em> and <em>trans-</em>dichloroethylene and trichloroethylene were measured in solution in CS<sub>2</sub> and CCl<sub>4</sub>. The observed values are in accord with those previously reported for other ethylenes.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 9","pages":"Pages 1599-1608"},"PeriodicalIF":0.0,"publicationDate":"1966-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80160-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75786299","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: 5
CH-Bindungsmomente und IR-Intensitäten von Benzol-Derivaten—I. Einführung 苯类衍生品之间的国际联系时间。引入
Spectrochimica Acta Pub Date : 1966-09-01 DOI: 10.1016/0371-1951(66)80162-5
E.D. Schmid, V. Hoffmann, R. Joeckle, F. Langenbucher
{"title":"CH-Bindungsmomente und IR-Intensitäten von Benzol-Derivaten—I. Einführung","authors":"E.D. Schmid,&nbsp;V. Hoffmann,&nbsp;R. Joeckle,&nbsp;F. Langenbucher","doi":"10.1016/0371-1951(66)80162-5","DOIUrl":"10.1016/0371-1951(66)80162-5","url":null,"abstract":"<div><p>It is shown that to a good approximation the CH-stretching vibrations in benzene derivatives are localized in the CH bonds and that the total intensity of a CH-stretching vibration of such a compound is given by the sum of the squares of the derivatives ∂μ|∂<em>R<sub>j</sub></em>: <em>I</em><sub>CH</sub> = <span><math><mtext>j</mtext><mtext>́</mtext></math></span>(<span><math><mtext>∂μ</mtext><mtext>∂</mtext><mtext>R</mtext><msub><mi></mi><mn>j</mn></msub></math></span>) ∂μ|∂<em>R<sub>j</sub></em> is the change of the molecular dipole moment with respect to a change of the stretching coordinate <em>R<sub>j</sub></em> of the <em>j</em>th CH bond. Experimental data demonstrate the validity of this approximation.</p><p>In continuation of our former investigations on the dependence of the CH-stretching vibrations on different substituents we have examined a considerable number of deuterated benzene monoderivatives, para-disubstituted benzene derivatives and 2-, 3- and 4-substituted pyridine derivatives. We have found a relation of general validity between <em>I</em><sub>CH</sub> and the Taft substitution constant σ<em><sub>I</sub></em>: <em>I</em><sub>CH</sub> = <em>F</em>(σ<em><sub>I</sub></em>). The interpretation of this result leads to conclusions concerning the effect of substituents on the CH dipole of benzene derivatives.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 9","pages":"Pages 1615-1619"},"PeriodicalIF":0.0,"publicationDate":"1966-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80162-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80175231","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: 11
Infrared intensity measurements—I. Experimental conditions and a standard band 红外强度测量- 1。实验条件和标准波段
Spectrochimica Acta Pub Date : 1966-09-01 DOI: 10.1016/0371-1951(66)80159-5
J.T. Shimozawa , M.K. Wilson
{"title":"Infrared intensity measurements—I. Experimental conditions and a standard band","authors":"J.T. Shimozawa ,&nbsp;M.K. Wilson","doi":"10.1016/0371-1951(66)80159-5","DOIUrl":"10.1016/0371-1951(66)80159-5","url":null,"abstract":"<div><p>The experimental conditions for the measurement of absolute infrared intensities of vibrational transitions have been examined using the out-of-plane CH vibration of 1,2,4,5-tetrachlorobenzone. This symmetrical band has been investigated in solution in carbon disulfide. The band was analyzed by the band shape moment analysis. The error in the experimentally determined intensity is estimated to be ±5 percent. It is suggested that this band would be useful as an intensity standard in condensed systems.</p></div>","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 9","pages":"Pages 1591-1597"},"PeriodicalIF":0.0,"publicationDate":"1966-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80159-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87554778","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: 10
Spectrochemical analysis of molten metal using a pulsed laser source 用脉冲激光源对熔融金属进行光谱化学分析
Spectrochimica Acta Pub Date : 1966-09-01 DOI: 10.1016/0371-1951(66)80168-6
E.F. Runge, S. Bonfiglio, F.R. Bryan
{"title":"Spectrochemical analysis of molten metal using a pulsed laser source","authors":"E.F. Runge,&nbsp;S. Bonfiglio,&nbsp;F.R. Bryan","doi":"10.1016/0371-1951(66)80168-6","DOIUrl":"10.1016/0371-1951(66)80168-6","url":null,"abstract":"","PeriodicalId":101180,"journal":{"name":"Spectrochimica Acta","volume":"22 9","pages":"Pages 1678-1680"},"PeriodicalIF":0.0,"publicationDate":"1966-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0371-1951(66)80168-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74235878","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
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