Addition Compounds of Urea and Organic Substances

Determination of the Composition of Urea-Hydrocarbon Complexes

“…As may be seen from Figure 1, the results which were obtained compare favorably with those given by Redlich et al (8) whose values were obtained by colorimetric methods, but differ somewhat from the earlier values reported by Zimmerschied et al (11, la). A value of 0.64 molecule of urea per carbon atom of chain length is determincld from tht.…”

“…In Figure I, the results of this work on the determination of the composition of a number of urea-hydrocarbon complexes, as well as the earlier data of Redlich et al (8) and of Zimmerschied et ai. (11,12) are presented.…”

Polymer Inclusion Compounds

“…The earliest studies of the thermodynamic properties, physical characteristics, uses, and other aspects of the urea and TU channel ICs were reported by Schlenk and Bengen [1,[28][29][30], Redlich" et al [31], Zimmerschied and coworkers [32], Schlenk and Holman [33], Fetterely [34], Linstead and Whalley [35], and other investigators [36][37][38]. In 1946, Mikus, Hixon, and Rundle [39] first characterized the amylase-fatty acid and alcohol ICs, while Cramer [9] discovered a number of unique ICs using CDs.…”

Adduction of amiloride hydrochloride in urea through a modified technique for the dissolution enhancement

“…On the basis of mathematical equation proposed by Redlich et al, 24 the minimum molal ratio m (urea/reactant) for AH, disregarding all branching, was calculated to be 5.65. As AH possess a cyclic and substituted molecular structure and can only be adducted in presence of a suitable RAE, the maximum amount of drug which can be included in urea was calculated to be $27%.…”