“Amide Resonance” Correlates with a Breadth of C−N Rotation Barriers

2007 ◽  
Vol 129 (9) ◽  
pp. 2521-2528 ◽  
Author(s):  
Carl R. Kemnitz ◽  
Mark J. Loewen
Keyword(s):  
Amide Resonance

A chromogenic molecular capsule attributable to dipolar amide resonance structure

2015 ◽  
Vol 51 (27) ◽  
pp. 6006-6009 ◽  
Author(s):  
Yeon Sil Park ◽  
Juwan Park ◽  
Kyungsoo Paek
Keyword(s):  
Resonance Structure ◽  
Acid Base ◽  
Capsule Formation ◽  
Naked Eye ◽  
Molecular Capsule ◽  
Acid Base Titration ◽  
Amide Resonance ◽  
Self Assembled ◽  
Upper Rim

A new chromogenic, self-assembled molecular capsule G@22is developed by introducing four (N,N-dimethyl-4-aminophenyl) azobenzyl moieties on the upper rim of a resorcin[4]arene-based amidoimino-cavitand. The tuning of conjugation between amido and (N,N-dimethyl-4-aminophenyl)azobenzyl groups by acid–base titration allows naked-eye observation of molecular capsule formation.

Steric Inhibition of Amide Resonance and its Possible Significance in Enzyme Action

Science ◽  
1953 ◽  
Vol 117 (3028) ◽  
pp. 23-25 ◽  
Author(s):  
R. W. Holley
Keyword(s):  
Enzyme Action ◽  
Amide Resonance

Poly-amidoamine structure characterization: amide resonance structure of imidic acid (HO–CN) and tertiary ammonium

RSC Advances ◽  
2014 ◽  
Vol 4 (90) ◽  
pp. 49535-49540 ◽  
Author(s):  
Yan Ji ◽  
XiaoLiang Yang ◽  
Ying Qian
Keyword(s):  
Structure Characterization ◽  
Resonance Structure ◽  
Amide Resonance ◽  
C Nmr

The dendrimer PAMAM has an amide resonance structure,i.e.imidic acid (HO–CN), and a tertiary ammonium structure, which can be characterized using15N/1H/2D NH/13C NMR, IR and MS.

Evidence for amide resonance observed in cyclic N-ammonio-imidates by X-ray photoelectron spectroscopy

1982 ◽  
pp. 875 ◽  
Author(s):  
Shinji Tsuchiya ◽  
Manabu Sen? ◽  
Walter Lwowski
Keyword(s):  
Photoelectron Spectroscopy ◽  
X Ray ◽  
Amide Resonance

Thermal Decomposition of N-Acyloxy-N-alkoxyamides - a New HERON Reaction

2010 ◽  
Vol 63 (12) ◽  
pp. 1717 ◽  
Author(s):  
Jennifer P. Johns ◽  
Arjan van Losenoord ◽  
Clément Mary ◽  
Pierre Garcia ◽  
Damian S. Pankhurst ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Substituent Effects ◽  
Intramolecular Rearrangement ◽  
Nitrate Ester ◽  
Solvent Cage ◽  
Amide Resonance

The HERON reaction has been observed in the thermal decompositions of N-acyloxy-N-alkoxyamides 1b, members of the class of anomeric amides. The N,N-bisoxo-substitution results in reduced amide resonance and this, combined with an nO–σ*NOAcyl anomeric destabilization of the N–OAcyl bond, results in their intramolecular rearrangement to anhydrides 42 and alkoxynitrenes 43 in competition with homolysis of the N–OAcyl bond to alkoxyamidyls 51. The primary HERON product alkoxynitrenes are scavenged by oxygen, giving a nitrate ester, in competition with a rearrangement to nitriles and dimerization to hyponitrites, leading, under the conditions, to alcohols and aldehydes. Persistent alkoxyamidyls most likely form a 1,3-diradical in a solvent-cage reaction, which cyclizes to 3,5-disubstituted-(5H)-1,4,2-dioxazoles 47. Substituent effects support this competition reaction.

The absence of amide resonance in acetophosphides

1967 ◽  
Vol 16 (6) ◽  
pp. 1362-1362
Author(s):  
R. G. Kostyanovskii ◽  
V. V. Yakshin ◽  
S. L. Z. Imont
Keyword(s):  
Amide Resonance

Barrier to Rotation in Thioformamide: Implications for Amide Resonance

1996 ◽  
Vol 118 (7) ◽  
pp. 1737-1742 ◽  
Author(s):  
Keith E. Laidig ◽  
Lynn M. Cameron
Keyword(s):  
Amide Resonance

The Interplay of Thio(seleno)amide/Vinylogous Thio(seleno)amide “Resonance” and the Anisotropic Effect of Thiocarbonyl and Selenocarbonyl Functional Groups

2005 ◽  
Vol 70 (17) ◽  
pp. 6592-6602 ◽  
Author(s):  
Erich Kleinpeter ◽  
Anja Schulenburg ◽  
Ines Zug ◽  
Horst Hartmann
Keyword(s):  
Functional Groups ◽  
Anisotropic Effect ◽  
Amide Resonance

Amide resonance and FT-IR spectra of some β-lactam derivatives: application of resolution enhancement procedures in Fourier space

1988 ◽  
Vol 174 ◽  
pp. 123-128 ◽  
Author(s):  
M. Gil ◽  
J. Plumet ◽  
N. Iza ◽  
J. Morcillo
Keyword(s):  
Ir Spectra ◽  
Resolution Enhancement ◽  
Fourier Space ◽  
Ft Ir ◽  
Amide Resonance
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