Summary
Thiourea has been found to form additional compounds with a great number of aliphatic, aromatic, and other cyclic compounds of various kind. More than eighty complexes have been prepared and examined. Most of these additional products have been recognized to have the same structure: the molecules of the organic compounds lay in channels of the lattice built by the thiourea molecules. The diameter of the channels is greater than that found in the urea complexes formerly described. Preferably substances with a branched chain structure or with unplanar cyclic molecules are added by thiourea, but under certain conditions it is also possible to prepare complexes which contain unbranched or planar molecules such as normal paraffins or benzene respectively. The mole ratio of the explored thiourea compounds is proportional to the length of the molecules enclosed, just as is the case with the urea enclosure compounds.
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References
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Schlenk, W. Thioharnstoff-Einschlußverbindungen. Experientia 6, 292 (1950). https://doi.org/10.1007/BF02170898
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DOI: https://doi.org/10.1007/BF02170898