Journal ArticleDOI
Complexes of N-methylxanthines with carboxylic acids
Denys Cook,Zephyr R. Regnier +1 more
TLDR
In this article, the complexes of caffeine and theobromine, with acetic and salicylic acid, have been studied by means of infrared spectroscopy, and a fairly strong hydrogen bond exists.Abstract:
Complexes of caffeine and theobromine, with acetic and salicylic acid, have been studied by means of infrared spectroscopy. In the complexes with aromatic acids a fairly strong hydrogen bond exists...read more
Citations
More filters
Journal ArticleDOI
Copper(II) perchlorate complexes with N-methyl substituted xanthines
TL;DR: In this article, the binding sites for caffeine and theophylline are the N(9) and N(7) imidazole nitrogens, respectively, in view of previously reported crystal structures of Cu2+ complexes with these ligands.
Journal ArticleDOI
Structural Studies on Complexes IV: Crystal Structure of a 1:1 5-Chlorosalicylic Acid and Theophylline Complex
TL;DR: The packing arrangement of the molecules suggests that the stacking forces are similar to those in a caffeine: 5-chlorosalicylic acid complex.
Journal ArticleDOI
Infrared Study of the Interaction Between Caffeine and Hydroxylic Derivatives
J. De Taeye,Th. Zeegers-Huyskens +1 more
TL;DR: The interaction between caffeine and hydroxylic derivatives (phenols, water) has been studied by infrared (IR) spectroscopy in 1,2-dichloroethane and the spectroscopic results show that the interaction of water takes place on the N9 atom of the imidazole ring in agreement with earlier X-ray results.
Journal ArticleDOI
Zirconium(IV) oxochloride complexes with xanthines and hypoxanthine
TL;DR: In this article, it was shown that the heptacoordinated polymeric ZrO(LH) 2 LCl·H 2 O (LH ≡ xanthine, hypoxanthine and theophylline, theobromine) complexes are obtained by boiling under reflux 2:1 molar mixtures of ligand and Zr OCl 2 ·8H2 O in ethanol-triethyl orthoformate.
Journal ArticleDOI
Computer simulation of the dartmouth process for separation of dilute Ethanol/Water mixtures
TL;DR: In this article, a computer simulation of the Dartmouth Process is presented, which aims to reduce energy costs by the use of IHOSR distillation, extensive heat integration, and extractive distillation using a salt.
Related Papers (5)
Absorption Spectra. VIII. The Infrared Spectra of Some Purines and Pyrimidines1,2
Elkan R. Blout,Melvin Fields +1 more
Formation of molecular complexes by some water‐soluble amides I. Interaction of several amides with p‐hydroxybenzoic acid, salicylic acid, chloramphenicol, and phenol
H.B. Kostenbauder,Takeru Higuchi +1 more