PROTONATED CARBONYL GROUPS: III. ANTIPYRINE SALTS
نویسندگان
چکیده
منابع مشابه
Orthogonal dipolar interactions between amide carbonyl groups.
Orthogonal dipolar interactions between amide C=O bond dipoles are commonly found in crystal structures of small molecules, proteins, and protein-ligand complexes. We herein present the experimental quantification of such interactions by employing a model system based on a molecular torsion balance. Application of a thermodynamic double-mutant cycle allows for the determination of the increment...
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The X-ray crystal structures of salts and zwitterionic Knoevenagel products from 1-dimethylamino-naphthalene-8-carbaldehyde show long N-C bonds between peri-groups which provide models for incomplete nucleophilic attack on a protonated carbonyl group and electron-deficient alkenes respectively. For the salts the N-C bonds lie in the range 1.625-1.638 Å with C-OH bonds intermediate in length bet...
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Protonated aromatic aldehydes and methyl ketones 1a-10a, carrying initially the proton at the carbonyl group, are prepared by electron impact-induced loss of a methyl radical from 1-arylethanols and 2-aryl-2-propanols, respectively. The aryl moiety of the ions corresponds to a benzene group, a naphthalene group, a phenanthrene group, a biphenyl group, and a terphenyl group. respectively, each s...
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The paper describes our attempt to prove earlier conclusions on the conformation and inter-ionic interactions of protonated Put, Spd and 5pm cations, based initially on the X-ray and IR data of only two types of salts: hydrochlorides and hydrated monohydrogen phosphates. These two sets of salts composed at the beginning only of native polyamines (Put4, Spd3•4 and Spm343) were later on extended ...
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ژورنال
عنوان ژورنال: Canadian Journal of Chemistry
سال: 1963
ISSN: 0008-4042,1480-3291
DOI: 10.1139/v63-410