Journal
JOURNAL OF COMPUTER-AIDED MOLECULAR DESIGN
Volume 19, Issue 9-10, Pages 693-703Publisher
SPRINGER
DOI: 10.1007/s10822-005-9008-0
Keywords
chemical reactions; clustering; condensed graphs of reactions; exchange of information; hydrogen bonds; QSPR; similarity; solubility; substructural fragments
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Substructural fragments are proposed as a simple and safe way to encode molecular structures in a matrix containing the occurrence of fragments of a given type. The knowledge retrieved from QSPR modelling can also be stored in that matrix in addition to the information about fragments. Complex supramolecular systems (using special bond types) and chemical reactions (represented as Condensed Graphs of Reactions, CGR) can be treated similarly. The efficiency of fragments as descriptors has been demonstrated in QSPR studies of aqueous solubility for a diverse set of organic compounds as well as in the analysis of thermodynamic parameters for hydrogen-bonding in some supramolecular complexes. It has also been shown that CGR may be an interesting opportunity to perform similarity searches for chemical reactions. The relationship between the density of information in descriptors/knowledge matrices and the robustness of QSPR models is discussed.
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