摘要:

AbstractA powerful argon ion laser was used to excite gaseous chlorine molecules resonantly from the X1Σ ground electronic state to the excited electronic state. Three progressions of P, R doublets which correspond to the excitation from J=37, 13 and 39 of v=0 of the X1Σ state to v′=22, J′=38; v′=18, J′=12 and v′=16, J′=38 of the state, respectively, and then decaying to various vibrational levels of the X1Σ state were observed. Of those, only the excitation from v=0, J=38 to v′=22, J′=38 transition has been reported before. Due to the extremely small transition probabilities, the spectral lines are much weaker than those of iodine and bromine. Their positions and their relative intensities were analyzed and compared with the result calculated from the known molecular constants and with the known Franck‐Condon factors. Our data are consistent with the calculated results within the range o

ISSN:0009-4536    

DOI:10.1002/jccs.197700001

出版商:WILEY‐VCH Verlag    

年代:1977

数据来源: WILEY

摘要:

AbstractThe acid dissociation constant (Ka) of β‐isopropyltropolone (IPT or HL) together with the stability constant (K) of its chelate complex with UO22+ion have been determined in water‐ethanol medium containing 50% ethanol by volume and 0.1 M NaClO, over the temperature range 15‐45°C. From these results, values of the free energy, enthalpy and entropy of the chelation have been calculated at 25°C The results are collected as

ISSN:0009-4536    

DOI:10.1002/jccs.197700002

出版商:WILEY‐VCH Verlag    

年代:1977

数据来源: WILEY

ISSN:0009-4536    

DOI:10.1002/jccs.197700003

出版商:WILEY‐VCH Verlag    

年代:1977

数据来源: WILEY

摘要:

AbstractTemperature effect on the extraction of uranyl and thorium nitrates by tributyl‐phosphate (TBP) has been investigated at different nitric acid concentration (–0.17 ∼ 3 N), and solvent composition from 10°C to 60°C. Thermodynamic quantities for the extraction of uranyl nitrate and thorium nitrate were also es

ISSN:0009-4536    

DOI:10.1002/jccs.197700004

出版商:WILEY‐VCH Verlag    

年代:1977

数据来源: WILEY

摘要:

AbstractChemical, Dehydration, Differential Thermal and X‐ray analysis of some clays has been carried out to study their mineralogical composition.All the clay samples appear to be basically montmorillonites. While in one of the clays, montmorillonite is the predominent phase, the other two also contain illites besides other clay mineral impuritie

ISSN:0009-4536    

DOI:10.1002/jccs.197700005

出版商:WILEY‐VCH Verlag    

年代:1977

数据来源: WILEY

摘要:

AbstractOn the further investigation, N‐nordicentrine(V) and L,‐(+)‐magnocurarine(VII) have been isolated from the trunks and leaves of Lindera oldhamii Hemsl, respect

ISSN:0009-4536    

DOI:10.1002/jccs.197700006

出版商:WILEY‐VCH Verlag    

年代:1977

数据来源: WILEY

摘要:

AbstractSeventeen heterocyclic and homocyclic chalcone analogues have been synthetically prepared by interaction of respective methyl aryl ketones and substituted benzaldehydes with a view to narrate their germicidal activity against E. coli and S. aureus. Tbe absorption spectra in infrared region has been recorded to show the presence of α, β‐unsaturated carbonyl gr

ISSN:0009-4536    

DOI:10.1002/jccs.197700007

出版商:WILEY‐VCH Verlag    

年代:1977

数据来源: WILEY