Results 161 to 170 of about 20,117,051 (204)
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N,N′‐Dialkyl‐, N,N,N′,N′‐Tetraalkyl‐ und N,N′‐Diaryl‐terephthalsäurediamide
Journal für Praktische Chemie, 1962AbstractAus Terephthaloylchlorid und prim. oder sek. aliphatischen Aminen werden in Äther bei Gegenwart von Triäthylamin N,N′‐Dialkyl‐ bzw. N,N,N′,N′‐Tetraalkyl‐terephthalsäurediamide dargestellt. Analog erhält man aus Arylaminen N,N′‐Diaryl‐terephthalsäurediamide. Von diesen Verbindungen wird die Stabilität bei höheren Temperaturen untersucht.
Helmut Zinner, Georg Sych, Werner Ludwig
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Extraction of uranium(VI) with N,N,N′,N′-tetrabutylmalonamide and N,N,N′,N′-tetrahexylmalonamide
Journal of Radioanalytical and Nuclear Chemistry, 1998A new diamide N,N,N′,N′-tetrahexylmalonamide (THMA) was synthesized, characterized and used in the extraction of U(VI) from nitric acid solutions. N,N,N′,N′-tetrabutylmalonamide (TBMA) was also studied to test the steric hindrance. Factors affecting this extraction system, the concentration of the extractant, aqueous nitric acid and NaNO3 and the ...
Meng Bao, Guo-Xin Sun
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Ionic Liquids for the Synthesis of Five-Membered N,N-, N,N,N- and N,N,N,NHeterocycles
Current Organic Chemistry, 2019Due to special properties of ILs (Ionic Liquids) like their wide liquid range, good solvating ability, negligible vapour pressure, non-inflammability, environment friendly medium, high thermal stability, easy recycling and rate promoters etc. they are used in organic synthesis.
Navjeet Kaur +5 more
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Neural Networks, 1992
The authors consider the ART1 neural network architecture introduced by G.A. Carpenter and S. Grossberg (Comput. Vis., Graph., and Image Process. vol.37, 54-115, 1987). In their original paper, Carpenter and Grossberg made the following conjecture. In the fast learning case if the F/sub 2/ layer in ART1 has at least N nodes, then each member of a list ...
Georgiopoulos, Michael +2 more
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The authors consider the ART1 neural network architecture introduced by G.A. Carpenter and S. Grossberg (Comput. Vis., Graph., and Image Process. vol.37, 54-115, 1987). In their original paper, Carpenter and Grossberg made the following conjecture. In the fast learning case if the F/sub 2/ layer in ART1 has at least N nodes, then each member of a list ...
Georgiopoulos, Michael +2 more
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Structure of N,N',N''-triphenylbiuret
Acta Crystallographica Section C Crystal Structure Communications, 1992C 20 H 17 N 3 O 2 cristallise dans P2 1 /n avec a=12,619, b=8,285, c=16,469A, β=94,39°, Z=4; affinement jusqu'a R=0,038. Les trois cycles phenyl sont connectes aux trois atomes N du biuret. Des liaisons hydrogene inter et intramoleculaires stabilisent la structure cristalline et moleculaire.
CARUGO O, POLI G, MANZONI L
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The lithiation of N,N,N′,N″,N″‐Pentamethyldlethylenetriamine (PMDTA)
Recueil des Travaux Chimiques des Pays-Bas, 1990AbstractThe title compound is easily lithiated at its NMe groups by alkyllithiums dissolved in alkanes.
M. Schakel, M. P. Aarnts, G. W. Klumpp
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