Author: Friedrich Wilhelm Kuepper
Publisher:
ISBN:
Category :
Languages : en
Pages : 41
Book Description
The report presents results on two research programs, one on inorganic synthesis and one on structural study by means of broad-line NMR, which were pursued simultaneously during the year ending August 31, 1968. The first had to do with the synthesis of compounds of the transition metals containing organosilicon groups. Organosilyl amines were used as electrondonor ligands to form six new stable coordination compounds of iron and cobalt. The second project concerned the structures and behavior of five new compounds prepared last year, all with C=N-Si linkages (plus one additional compound with C=N-C linkage, for comparison). Earlier examination of the UV absorption spectra of these compounds had shown that there is little d pi - p pi interaction between the nitrogen and silicon, because the C=N-Si sequence is not linear but bent at an angle of 120 deg. The spectra were obtained, and calculation of line widths and second moments showed that intramolecular motion in all five organosilicon compounds was hindered more than in the organic compound, and that one of the five (the only one which had an Si-N-C=N-Si structure) had a much more persistent restriction of motion with rise of temperature than the others. (Author).
I. Syntheses of Iron and Cobalt Complexes with Ligands Containing Silicon-nitrogen Bonds. Ii. Internal Motions of N-organosilyl Ketimines
Author: Friedrich Wilhelm Kuepper
Publisher:
ISBN:
Category :
Languages : en
Pages : 41
Book Description
The report presents results on two research programs, one on inorganic synthesis and one on structural study by means of broad-line NMR, which were pursued simultaneously during the year ending August 31, 1968. The first had to do with the synthesis of compounds of the transition metals containing organosilicon groups. Organosilyl amines were used as electrondonor ligands to form six new stable coordination compounds of iron and cobalt. The second project concerned the structures and behavior of five new compounds prepared last year, all with C=N-Si linkages (plus one additional compound with C=N-C linkage, for comparison). Earlier examination of the UV absorption spectra of these compounds had shown that there is little d pi - p pi interaction between the nitrogen and silicon, because the C=N-Si sequence is not linear but bent at an angle of 120 deg. The spectra were obtained, and calculation of line widths and second moments showed that intramolecular motion in all five organosilicon compounds was hindered more than in the organic compound, and that one of the five (the only one which had an Si-N-C=N-Si structure) had a much more persistent restriction of motion with rise of temperature than the others. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 41
Book Description
The report presents results on two research programs, one on inorganic synthesis and one on structural study by means of broad-line NMR, which were pursued simultaneously during the year ending August 31, 1968. The first had to do with the synthesis of compounds of the transition metals containing organosilicon groups. Organosilyl amines were used as electrondonor ligands to form six new stable coordination compounds of iron and cobalt. The second project concerned the structures and behavior of five new compounds prepared last year, all with C=N-Si linkages (plus one additional compound with C=N-C linkage, for comparison). Earlier examination of the UV absorption spectra of these compounds had shown that there is little d pi - p pi interaction between the nitrogen and silicon, because the C=N-Si sequence is not linear but bent at an angle of 120 deg. The spectra were obtained, and calculation of line widths and second moments showed that intramolecular motion in all five organosilicon compounds was hindered more than in the organic compound, and that one of the five (the only one which had an Si-N-C=N-Si structure) had a much more persistent restriction of motion with rise of temperature than the others. (Author).
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 312
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 312
Book Description
U.S. Government Research & Development Reports
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1184
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1184
Book Description
U.S. Government Research and Development Reports Index
Author:
Publisher:
ISBN:
Category : Nuclear science abstracts
Languages : en
Pages : 1306
Book Description
Publisher:
ISBN:
Category : Nuclear science abstracts
Languages : en
Pages : 1306
Book Description
Bibliography of Scientific and Industrial Reports
Author:
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 1180
Book Description
Publisher:
ISBN:
Category : Research
Languages : en
Pages : 1180
Book Description
Government Reports Index
Author:
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 976
Book Description
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 976
Book Description
Government Reports Annual Index
Author:
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 938
Book Description
Publisher:
ISBN:
Category : Government reports announcements & index
Languages : en
Pages : 938
Book Description
U. S. Government Research and Development Reports
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1174
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1174
Book Description
Government Reports Announcements
Author:
Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 974
Book Description
Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 974
Book Description
Government Reports Announcements & Index
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1172
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1172
Book Description