@article { ISI:000233948800019, title = {Nucleobases in molecular recognition: molecular adducts of adenine and cytosine with COOH functional groups}, journal = {Angewandte Chemie International Edition}, volume = {44}, number = {47}, year = {2005}, month = {NOV}, pages = {7752-7757}, publisher = {WILEY-V C H VERLAG GMBH}, address = {PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY}, keywords = {carboxylic acids, hydrogen bonds, molecular recognition, nucleobases, supramolecular chemistry}, issn = {1433-7851}, doi = {10.1002/anie.200502434}, author = {Perumal, Sathiamurthi and Suresh, E. and Pedireddi, V. R.} } @article { ISI:000228412500017, title = {Structural rationalisation of co-crystals formed between trithiocyanuric acid and molecules containing hydrogen bonding functionality}, journal = {Chemistry - A European Journal}, volume = {11}, number = {8}, year = {2005}, note = {Symposium on Chemistry-A European Conference - Stimulating Concepts in Chemistry, Inst Sci Ingenierie Supramoleculaires, Strasbourg, FRANCE, APR 15, 2005}, month = {APR}, pages = {2433-2439}, publisher = {WILEY-BLACKWELL}, type = {Article}, address = {COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA}, abstract = {

Crystallisation of trithiocyanuric acid (TTCA) from various organic solvents that have hydrogen bonding capability (acetone, 2-butanone, dimethylformamide, dimethyl sulfoxide, methanol and acetonitrile) leads to the formation of co-crystals in which the solvent molecules are incorporated together with TTCA in the crystal structure. Structure determination by single-crystal X-ray diffraction reveals that these co-crystals can be classified into different groups depending upon the topological arrangement of the TTCA molecules in the crystal structure. Thus, three different types of single-tape arrangements of TTCA molecules and one type of double-tape arrangement of TTCA molecules are identified. In all co-crystals, hydrogen-bonding interactions are formed through the involvement of N-H bonds of TTCA molecules in these tapes and the other molecule in the co-crystal. Detailed rationalisation of the structural properties of these co-crystals is presented.

}, keywords = {crystal engineering, hydrogen bonds, nitrogen heterocycles, structure elucidation}, issn = {0947-6539}, doi = {10.1002/chem.200400340}, author = {Ahn, Sung-Hoon and PrakashaReddy, J. and Kariuki, B. M. and Chatterjee, S. and Ranganathan, A. and Pedireddi, V. R. and Rao, C. N. R. and Harris, Kenneth D. M.} } @article { ISI:000258683600017, title = {pK(a)-Directed host-guest assemblies: rational analysis of molecular adducts of 2,4-diamino-6-methyl-1,3,5-triazine with various aliphatic dicarboxylic acids}, journal = {Chemistry-A European Journal}, volume = {14}, number = {23}, year = {2008}, month = {JUL}, pages = {6967-6977}, publisher = {WILEY-V C H VERLAG GMBH}, address = {PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY}, abstract = {

Molecular adducts of 2,4-diamino-6-methyl-1,3,5-triazine (1) have been prepared with various aliphatic dicarboxylic acids. The molecular complexes (1a-1i) thus formed by co-crystallizing 1 with oxalic, malonic, succinic, fumaric, acetylene dicarboxylic, glutaric, thiodiglycolic, diglycolic, and adipic acids have been found to give two types of host-guest assemblies that have voids or channels in a three-dimensional arrangement. The different types of host-guest arrangement appear to result from differences in the acidity of the dicarboxylic acids, that is, acids with pK(a) \< 3.0 give host networks that consist of 1 and the corresponding acid with water or solvent molecules of crystallization present as guests, whereas acids with pK(a) \> 3.0 exist as guests in voids in a host network formed by 1. The former arrangement is observed in adducts 1a, 1b, 1c, and 1h and the latter arrangement is found in adducts 1c, 1d, 1f, 1g and 1i.

}, keywords = {dicarboxylic acids, host-guest systems, hydrogen bonds, molecular recognition, supramolecular chemistry}, issn = {0947-6539}, doi = {10.1002/chem.200800649}, author = {Delori, Amit and Suresh, Eringathodi and Pedireddi, V. R.} } @article { ISI:000271838100014, title = {C-H center dot center dot center dot N hydrogen bonds mediated solid state structures of 2,2 {\textquoteleft}-bis (4-pyridylsulfanylmethyl)-1,1 {\textquoteleft}-biphenyl and 9-(4-pyridylsulfanyl)phenanthrene}, journal = {Journal of Molecular Structure}, volume = {937}, number = {1-3}, year = {2009}, month = {NOV}, pages = {81-84}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

Solid state structure elucidation of sulfanyl ligands, 2,2{\textquoteright}-bis(4-pyridylsulfany[methyl)-1,1{\textquoteright}-biphenyl, L(1) and 9-(4-pyridylsulfanyl)plienanthrene, L(2) are reported. In the structures L(1) and L(2), the molecules are self-assembled through C-H center dot center dot center dot N hydrogen bonds, yielding ensembles of cyclic and helical networks. (C) 2009 Elsevier B.V. All rights reserved.

}, keywords = {hydrogen bonds, noncovalent interactions, Supramolecular assemblies}, issn = {0022-2860}, doi = {10.1016/j.molstruc.2009.08.020}, author = {Upadhye, Ketaki and PrakashaReddy, J. and Pedireddi, V. R.} }