Synthesis and properties of N-Phenyl derivatives of 4,4'-Diaminobenzophenone

1983 ◽  
Vol 36 (2) ◽  
pp. 409 ◽  
Author(s):  
NA Evans
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Mass Spectra ◽  
Reaction Conditions ◽  
Satisfactory Yield ◽  
13C Nuclear Magnetic Resonance ◽  
Derivatives Of ◽  
Nuclear Magnetic

Variations in the reaction conditions during the Ullmann condensation of 4,4'-diaminobenzophenone with iodobenzene and the Goldberg diphenylamine synthesis with 4,4'-dibromobenzophenone and acetanilide or 4,4'-bis(acetamido)benzophenone and iodobenzene yielded the five possible partially and completely N-phenylated 4,4'- diaminobenzophenones. By choice of starting materials, 4,4'-bis(phenylamino)benzophenone could be obtained in satisfactory yield. The infrared, ultraviolet, 1H and 13C nuclear magnetic resonance and mass spectra of the benzophenones are reported.

13C Nuclear Magnetic Resonance Studies of Organometallic Compounds. IV. cis-Dimethylplatinum(II) Derivatives

1974 ◽  
Vol 52 (7) ◽  
pp. 1165-1170 ◽  
Author(s):  
Howard Charles Clark ◽  
Leo Ernest Manzer ◽  
John Edward Henry Ward
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Organometallic Compounds ◽  
Methyl Groups ◽  
Magnetic Resonance Studies ◽  
Trans Influence ◽  
13C Nuclear Magnetic Resonance ◽  
Cis And Trans ◽  
Derivatives Of ◽  
Nuclear Magnetic

Data derived from the 13C n.m.r. spectra of seven neutral cis-dimethylplatinum(II) derivatives of the type cis-(CH3)2PtL2 and cis-(CH3)2Pt(L—L) (where L and L—L are neutral donors) are discussed and compared with data derived from the 1H n.m.r. spectra of the complexes. Simultaneous variations in L or L—L reveal that the n.m.r. trans-influence rather than the n.m.r. cis-influence is dominant. The suggestion that the n.m.r. cis- and trans-influences may be additive is discussed. In contrast with data obtained by other workers, it is shown that the 1JCH values of the platinum methyl groups are essentially insensitive to variations in the remaining ligands.

The nuclear magnetic resonance and mass spectra of derivatives of cycloserine

Tetrahedron ◽  
1967 ◽  
Vol 23 (1) ◽  
pp. 65-76 ◽  
Author(s):  
G.W.A. Milne ◽  
L.A. Cohen
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Mass Spectra ◽  
Derivatives Of ◽  
Nuclear Magnetic

Nuclear magnetic resonance and mass spectral properties of 5-aryltetrazoles

1968 ◽  
Vol 46 (17) ◽  
pp. 2855-2859 ◽  
Author(s):  
Robert R. Fraser ◽  
K. E. Haque
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Spectral Properties ◽  
Mass Spectra ◽  
Tetrazole Ring ◽  
Coupling Constant ◽  
Mass Spectral ◽  
Methyl Derivatives ◽  
Derivatives Of ◽  
Nuclear Magnetic

The nuclear magnetic resonance and mass spectral behavior of 5-phenyltetrazole, 5-p-nitrophenyl-tetrazole and the 1-methyl and 2-methyl derivatives of each have been determined. Characteristic differences between the spectra of the 1-methyl and 2-methyl isomers have been noted and found to be useful for the purpose of structural assignments. The synthesis of 1- and 2-methyl-5-phenyltetrazole containing 47.5 % of 15N in the 1- and 4-positions of the tetrazole ring aided interpretation of the mass spectra and also allowed measurement of a geminal and a vicinal 15N—H coupling constant.

A 13C nuclear magnetic resonance study of the reversible substituent migration in several 2-acyl and 2-silyl derivatives of tropolone. Troponoid-IV

1982 ◽  
Vol 60 (3) ◽  
pp. 231-238 ◽  
Author(s):  
D. Ménard ◽  
M. St-Jacques ◽  
J. F. Bagli
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Energy Barrier ◽  
Bromine Atom ◽  
Nuclear Magnetic Resonance Study ◽  
Magnetic Resonance Study ◽  
13C Nuclear Magnetic Resonance ◽  
Silyl Derivatives ◽  
Derivatives Of ◽  
Nuclear Magnetic

The energy barrier for the reversible substituent migration was determined for a number of 2-acyl and 2-silyl derivatives of tropolone. The energy barrier is found to be dependent on the nature of the migrating group. Asymmetric monosubstitution on the ring shifts the equilibrium in favor of one dynamic isomer. In the two cases studied (3-bromotropolone and 3-bromotropolone acetate) it is found that the equilibrium is shifted towards the isomer bearing the bromine atom at the 7-position.

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