Studies of specifically fluoridated carbohydrates. Part V. Derivatives of 3,6-anhydro-5-deoxy-5-fluoro-1,2-O-isopropylidene-α-L-idofuraeose

1970 ◽  
Vol 48 (3) ◽  
pp. 451-458 ◽  
Author(s):  
L. D. Hall ◽  
P. R. Steiner
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Spin Coupling ◽  
Facile Synthesis ◽  
Nuclear Magnetic Resonance Spectra ◽  
Derivatives Of ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The facile synthesis of 3,6-anhydro-5-deoxy-5-fluoro-1,2-O-isopropylidene-α-L-idofuranose (4) from readily available precursors is described. The 1H and 19F nuclear magnetic resonance spectra of this derivative have been analyzed. Interestingly, the fluorine substituent exhibits detectable spin coupling with all ring protons except H-2. Both of the anomeric 1,2-di-O-acetyl derivatives of (4) have also been studied.

Carbonyl nitrosyl halide complexes of molybdenum and tungsten. II. Triarylphosphine and arsine complexes of tungsten

1973 ◽  
Vol 26 (7) ◽  
pp. 1487 ◽  
Author(s):  
R Colton ◽  
CJ Commons
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Spectra ◽  
Halide Complexes ◽  
Trans Complex ◽  
Derivatives Of ◽  
And Tungsten ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

Triphenylphosphine and triphenylarsine derivatives of W(CO)4(NO)X (X = Cl, Br, I) have been prepared. These compounds have the form mer- W(CO)3(NO)LX, cis-W(CO)2(NO)L2X, and trans-W(CO)2(NO)(PPh3)2X. A trans complex with triphenylarsine could not be prepared. Further substitution with either ligand was not achieved. In addition, the tri(ortho-, meta-, and para-)tolylphosphine and arsine complexes of W(CO)4(NO)I have been isolated. Their nuclear magnetic resonance spectra indicate interaction between neighbouring ligands in some cases, and suggest that possible rotation about the metal-phosphorus and arsenic bonds may occur in these compounds.

The yellow pigments of Beauveria species. Structures of tenellin and bassianin

1977 ◽  
Vol 55 (23) ◽  
pp. 4090-4098 ◽  
Author(s):  
Chi-Kit Wat ◽  
A. Gavin Mcinnes ◽  
Donald G. Smith ◽  
Jeffrey L. C. Wright ◽  
Leo C. Vining
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Spin Coupling ◽  
Spectroscopic Evidence ◽  
Nuclear Magnetic Resonance Spectra ◽  
N Isotopes ◽  
Yellow Pigments ◽  
Spin Spin Coupling ◽  
Derivatives Of ◽  
Magnetic Resonance Spectra

Tenellin and bassianin are deduced from chemical and spectroscopic evidence to be the 3-[(E,E)-4,6-dimethylocta-2,4-dienoyl] and 3-[(E,E,E)-6,8-dimethyldeca-2,4,6-trienoyl] derivatives of 1,4-dihydroxy-5-(p-hydroxyphenyl)-2(1H)-pyridone. Spin–spin coupling information in the 1H and 13C nuclear magnetic resonance spectra after biosynthetic enrichment of tenellin with 13C and 15N isotopes was a valuable aid in elucidating the structure.

Methylmercury(II) derivatives of Pyridine-2(1H)-thione

1976 ◽  
Vol 29 (6) ◽  
pp. 1383 ◽  
Author(s):  
AJ Canty ◽  
A Marker
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nitric Acid ◽  
Magnetic Resonance ◽  
Sodium Bicarbonate ◽  
Nuclear Magnetic Resonance Spectra ◽  
Derivatives Of ◽  
Methyl Pyridine ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

Methylmercuric nitrate reacts with pyridine-2(lH)-thione (C5H5NS) in acetone to give methyl-(pyridine-2(1H)-thione)mercury(11) nitrate, [MeHg(C5H5NS)] NO3. This complex reacts with sodium bicarbonate in acetone to give methyl(pyridine-2-thiolato)mercury(11), MeHg(C5H4NS).Infrared, Raman, and nuclear magnetic resonance spectra indicate that MeHgH is bonded to sulphur in both complexes, and that protonation of nitrogen occurs on reaction of MeHg(CsH,NS) with nitric acid to give [MeHg(C5H5NS)] NO3.

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