Titanium tetrachloride promoted conversion of carboxylic acids to carboxamides

1970 ◽  
Vol 48 (6) ◽  
pp. 983-986 ◽  
Author(s):  
James D. Wilson ◽  
Harold Weingarten
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Carboxylic Acids ◽  
Atmospheric Pressure ◽  
Room Temperature ◽  
Titanium Tetrachloride ◽  
Nuclear Magnetic Resonance Spectra ◽  
Derivatives Of ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

In the presence of approximately stoichiometric amounts of TiCl4, carboxylic acids and amines react at room temperature and atmospheric pressure to form carboxamides in good yields. The mono- and diformyl derivatives of 1,2-dimethylhydrazine exhibit unusual nuclear magnetic resonance spectra which are briefly discussed.

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.

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.

The Carbon-13 Nuclear Magnetic Resonance Spectra of 2-Acetamido-2-deoxy-D-hexoses and some Specifically Deuteriated, O-Acetylated, and Phosphorylated Derivatives

1973 ◽  
Vol 51 (22) ◽  
pp. 3812-3819 ◽  
Author(s):  
D. R. Bundle ◽  
H. J. Jennings ◽  
Ian C. P. Smith
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Substituent Effects ◽  
Model Compounds ◽  
Initial Assignment ◽  
Nuclear Magnetic Resonance Spectra ◽  
Polysaccharide Antigens ◽  
Derivatives Of ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The 13C n.m.r. spectra of the 2-acetamido-2-deoxy-D-hexoses and some 3-O-acetyl and 1-phosphate derivatives are assigned and discussed. To facilitate the interpretation of the spectra, an initial assignment of the resonances in the spectrum of 2-acetamido-2-deoxy-D-glucose was required. For this purpose, both the 3-2H and 4-2H derivatives of this acetamido-hexose were synthesized. These syntheses are reported together with those of 2-acetamido-3-O-acetyl-2-deoxy-D-glucose and 2-acetamido-2-deoxy α- and β-D-glucose-1-phosphate. These model compounds were used to study substituent effects related to the 2-acetamido-2-deoxy-D-hexose-containing polysaccharide antigens of N. meningitides.

Carbon-13 Nuclear Magnetic Resonance Spectra of Some Dendroketose and Other Furanose Derivatives

1975 ◽  
Vol 53 (18) ◽  
pp. 2748-2754 ◽  
Author(s):  
Dolatrai M. Vyas ◽  
Harold C. Jarrell ◽  
Walter A. Szarek
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Carbon Atom ◽  
Nuclear Magnetic Resonance Spectra ◽  
Branched Chain ◽  
Derivatives Of ◽  
Anomeric Center ◽  
Magnetic Resonance Spectra ◽  
Nuclear Magnetic

The carbon-13 n.m.r. spectra of derivatives of the branched-chain sugars apiose and dendroketose, and of other furanose sugars, are reported. The study has permitted assignment of the configuration at the branching carbon atom and at the anomeric center in the dendroketose derivatives.

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