02006nas a2200277   4500008004100000022001400041245013800055210006900193260007600262300001400338490000700352520097700359653002401336653001901360653002601379653002601405100001901431700002201450700002001472700001901492700002001511700002201531700001901553700002701572856012901599       2005                        eng d  a0947-653900aStructural rationalisation of co-crystals formed between trithiocyanuric acid and molecules containing hydrogen bonding functionality0 aStructural rationalisation of cocrystals formed between trithioc  aCOMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USAbWILEY-BLACKWELLcAPR  a2433-24390 v113 a<p>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.</p>10acrystal engineering10ahydrogen bonds10anitrogen heterocycles10astructure elucidation1 aAhn, Sung-Hoon1 aPrakashaReddy, J.1 aKariuki, B., M.1 aChatterjee, S.1 aRanganathan, A.1 aPedireddi, V., R.1 aRao, C., N. R.1 aHarris, Kenneth, D. M.  uhttp://library.ncl.res.in/content/structural-rationalisation-co-crystals-formed-between-trithiocyanuric-acid-and-molecules-002228nas a2200169   4500008004100000022001400041245008900055210006900144260011000213300001000323490000700333520153300340100002401873700002601897700002201923856011301945       2009                        eng d  a1144-054600aSupramolecular synthesis of some molecular adducts of 4,4 `-bipyridine N,N `-dioxide0 aSupramolecular synthesis of some molecular adducts of 44 bipyrid  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcOCT  a57-630 v333 a<p>Molecular adducts (1a-1e) of 4,4'-bipyridine N,N'-dioxide, 1, respectively with cyanuric acid, trithiocyanuric acid, 1,3,5-trihydroxybenzene ( phloroglucinol), 1,3-dihydroxybenzene ( resorcinol) and 1,2,4,5-benzenetetracarboxylic acid have been reported. The major interactions observed in the structures 1a-1e are N-H center dot center dot center dot O, N-H center dot center dot center dot S, O-H center dot center dot center dot O and C-H center dot center dot center dot O, in the form of homomeric and heteromeric patterns of the constituents, either as a single or cyclic hydrogen-bonded motifs. While in the adduct 1a, both homomeric and heteromeric units of both the constituents were observed, no heteromeric interactions were observed in 1b and 1c. In addition, in 1b, homomeric aggregation of molecules of 1 occurred in association with water molecules. However, while heteromeric interactions prevail between the constituents in 1d and 1e, only one of the co-crystallizing species gave homomeric interactions (4,4'-bipyridine N,N'-dioxide in 1d; 1,2,4,5-benzenetetracarboxylic acid in 1e). Further, in either type of the patterns, the cyclic motifs are formed as a pair-wise hydrogen bonds comprising of strong and weak hydrogen bonds (N-H center dot center dot center dot O/C-H center dot center dot center dot O or O-H center dot center dot center dot O/C-H center dot center dot center dot O). In three-dimensions, the ensembles of molecules yield planar sheets, ladders and pseudorotaxane type assemblies.</p>1 aArora, Kapildev, K.1 aTalwelkar, Mayura, S.1 aPedireddi, V., R.  uhttp://library.ncl.res.in/content/supramolecular-synthesis-some-molecular-adducts-44-bipyridine-nn-dioxide-0