NUCLEAR MAGNETIC RESONANCE SPECTRA AND CONDUCTIVITIES OF SOME METAL ACETYLACETONATES

1965 ◽  
Vol 43 (9) ◽  
pp. 2559-2565 ◽  
Author(s):  
A. J. Carty ◽  
D. G. Tuck ◽  
E. Bullock
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Spectroscopic Studies ◽  
Metal Acetylacetonates ◽  
Group Iii ◽  
Nuclear Magnetic Resonance Spectra ◽  
Chemical Shift Data ◽  
Shift Data ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

Chemical shift data and conductivities of acetylacetonates of some group IA, IIA, and IIIA metals in dimethylsulfoxide are recorded. It is concluded that nuclear magnetic resonance spectra cannot give definite information on π-bonding in these complexes, though the results for the group III elements are consistent with the presence of such bonds, as is the evidence from related spectroscopic studies.

Nuclear magnetic resonance spectra, stereochemistry, and conformation of flavan derivatives

1964 ◽  
Vol 17 (6) ◽  
pp. 632 ◽  
Author(s):  
JW Clark-Lewis ◽  
LM Jackman ◽  
TM Spotswood
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Chemical Shift ◽  
Heterocyclic Ring ◽  
Coupling Constant ◽  
Nuclear Magnetic Resonance Spectra ◽  
Chemical Shift Data ◽  
Shift Data ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

Chemical-shift and coupling-constant data for protons in 68 flavan derivatives are reported. Coupling-constant data for interactions involving the 2-, 3-, and 4-protons have been used to define the configuration of the 2-, 3-, and 4-substituents and the conformation of the heterocyclic ring. It is shown that chemical-shift data for protons of the heterocyclic ring and of 3- and 4-acetoxyl groups are of little value in stereochemical studies. Analysis of the absorptions of the aromatic protons shows that N.M.R. is useful for determining the oxygenation pattern in rings A and B.

11B—NMR- spektroskopische Untersuchungen an wäßrigen Polyboratlösungen / 11B NMR Spectroscopic Studies on Aqueous Polyborate Solutions

1979 ◽  
Vol 34 (8) ◽  
pp. 1078-1083 ◽  
Author(s):  
Ralf Janda ◽  
Gert Heller
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Aqueous Solutions ◽  
Nmr Spectra ◽  
Spectroscopic Studies ◽  
Sodium Potassium ◽  
Nuclear Magnetic Resonance Spectra ◽  
11B Nmr ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The 11B nuclear magnetic resonance spectra of sodium, potassium and ammonium polyborates in aqueous solutions, - as a function of concentration and pH - , provide information of the hydrolysis equilibria. Two 11B NMR lines are observed in aqueous solutions of Na[B5O6(OH)4], K[B5O6(OH)4] and NH4[B5O6(OH)4]. Only one 11B NMR line is recorded in aqueous solutions of (NH4)2[B4O5(OH)4] and Na2[B4O5(OH)4]. The results of the 11B NMR spectra are discussed and compared with the results obtained from Raman studies of aqueous polyborate solutions

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