Chemical Sciences: Recent submissions

  • 1,4-dimethylpiperazinium tetrathiotungstate(VI) 
    Srinivasan, B.R.; Dhuri, S.N.; Naether, C.; Bensch, W. (Acta Crystallographica Section E-Structure Reports Online. 59; 2003; M681-M683.)
    The title complex, (C6H16N2)[WS4], consists of tetrahedral [WS4](2-) dianions and organic dications.There are two crystallographically independent 1,4-dimethylpiperazinium (1,4-dmpH(2)) dications in the asymmetric unit, ...
  • Synthesis, spectroscopic and X-ray structure characterization of ethylenediammonium chromate and ethylenediammonium dichromate 
    Srinivasan, B.R.; Dhuri, S.N.; Naether, C.; Bensch, W. (Indian Journal of Chemistry Section A-Inorganic Bio-Inorganic Physical Theoretical and Analytical Chemistry. 42; 2003; 2735-2741.)
    The reaction of ethylenediammonium chloride (enH2)Cl2 with potassium chromate or dichromate in a 1:1 mole ratio results in the formation of the title complexes ethylenediammonium chromate (enH2)[CrO4] 1 and ethylenediammonium ...
  • 1,3-Propanediammonium tetrathiotungstate and N,N,N',N'-tetramethylethylenediammonium tetrathiotungstate 
    Srinivasan, B.R.; Dhuri, S.N.; Naether, C.; Bensch, W. (Acta Crystallographica Section C-Crystal Structure Communications. 59; 2003; M124-M127.)
    The title complexes, (C3H12N2)[WS4] and (C6H18N2)[WS4], contain tetrahedral [WS4](2-) dianions, which accept a complex series of hydrogen bonds from the organic dications. The strength and number of these hydrogen bonds ...
  • Piperazinium Chromate(VI) 
    Srinivasan, B.R.; Naether, C.; Bensch, W. (Acta Crystallographica Section E-Structure Reports Online. 59; 2003; m639-m641.)
    The structure of the title complex, (C4H12N2)[CrO4], consists of tetrahedral [CrO4]2- dianions which are connected to the cyclic organic piperazinium dications via hydrogen bonding. All the atoms are located in general positions.
  • Synthesis of olivacene, a constituent of Archilejeunea olivacea 
    Kamat, S.P.; D'Souza, A.M.; Paknikar, S.K. (Indian Journal of Chemistry Section B-Organic Chemistry Including Medicinal Chemistry. 42(10); 2003; 2662-2664.)
    A simple synthesis of olivacene 1, a naturally occurring sesquiterpenoid hydrocarbon isolated from Archilejeunea olivacea has been described.
  • Bound and continuum vibrational states of the bifluoride anion 
    Spirko, V.; Sindelka, M.; Shirsat, R.N.; Leszczynski, J. (Chemical Physics Letters. 376(5and6); 2003; 595-605.)
    The energies of the bound vibrational states and energy density spectra of the continuum vibrational states of FHF-are calculated, 'exactly' and 'adiabatically', using a new ab initio (CCSD(T)) potential energy surface. ...
  • Intramolecular Wittig reactions. A new synthesis of coumarins and 2-quinolones 
    Desai, V.G.; Shet, J.B.; Tilve, S.G.; Mali, R.S. (Journal of Chemical Research. 2003(10); 2003; 628-629.)
    o-Hydroxybenzaldehydes (1a-d) on reaction with chloroacetyl chloride in presence of pyridine followed by addition of triphenyl phosphine and base gave coumarins (2a-d). A similar sequence of reactions on o-aminoacetophen ...
  • Sodium metaperiodate oxidation of isocarvacrol 
    Kamat, S.P.; D'Souza, A.M.; Paknikar, S.K. (Journal of Chemical Research. 2003(7); 2003; 395-397.)
    Sodium metaperiodate oxidation of isocarvacrol 8, a monoterpene phenol has been found to give hydrothymoquinone 13, a natural product and a ring cleavage product 7-oxo-5-isopropyloct-3-en-2,5-olide 14.
  • UVA light-induced DNA cleavage by isomeric methylbenz[a]anthracenes 
    Dong, S.; Fu, P.P.; Shirsat, R.N.; Hwang, H.M.; Leszczynski, J.; Yu, H. (Chemical Research in Toxicology. 15(3); 2002; 400-407.)
    UVA light-induced DNA single strand cleavage by a set of 12 monomethyl substituted benz[a]anthracenes (MBAs) along with their parent compound, benz[a]anthracene (BA), and the potent carcinogen, 7,12-dimethylbenz[a]anthracene ...
  • A convenient one-pot synthesis of 4-methyl-3-phenyl-, 3-aryl- and 3-aryl-4-phenylcoumarins 
    Kamat, S.P.; D'Souza, A.M.; Paknikar, S.K.; Beauchamp, P.S. (Journal of Chemical Research. (5); 2002; 242-246.)
    Thermal condensation of 2'-hydroxyacetophenones 1a-e with phenylacetic acid 2a in refluxing diphenyl ether gives 4-methyl-3-phenylcoumarins 3a-e. Similarly, reaction of 2-hydroxybenzaldehydes 1f-m and 2-hydroxybenzophenones ...

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