Volume 31 (2020)
Volume 30 (2019)
Volume 29 (2018)
Volume 28 (2017)
Volume 27 (2016)
Volume 26 (2015)
Volume 25 (2014)
Volume 24 (2013)
Volume 23 (2012)
Volume 22 (2011)
Volume 21 (2010)
Volume 20 (2009)
Volume 19 (2008)
Volume 18 (2007)
Volume 17 (2006)
Volume 16 (2005)
Volume 15 (2004)
Volume 14 (2003)
Volume 13 (2002)
Volume 12 (2001)
Volume 11 (2000)
Volume 10 (1999)
Volume 9 (1998)
Volume 8 (1997)
Volume 7 (1996)
Volume 6 (1995)
Volume 5 (1994)
Volume 3 (1992)
Volume 2 (1991)
Volume 1 (1990)
Volume 1 (1989)
1. INTRINSIC FLUORESCENT COMPOUNDS IN ARMILLARIA MELLEA; HYPHAE AND RHIZOMORPH
Volume 4, Issue 4 , Autumn 1993

Abstract
  The organic solvent extraction of Armillaria mellea showed different highly intrinsic fluorescent compounds either in rhizomorph or in hyphae (F , F , F , MF , MF and MF ). The characterization of ultraviolet and fluoro-spectrophotometry of these compounds has been exhibited. Thin layer chromatography and ...  Read More

2. SYNTHESIS AND THERMAL REARRANGEMENT OF OXYGEN HETEROCYCLIC SPIRANS
Volume 4, Issue 4 , Autumn 1993

Abstract
  Thermal rearrangement of spirans (14) and (31) yields the xanthones (16,34) and diphenylrnethane (15, 32), respectively. The structure for xanthone (16), isolated from thermolysis, has been established by reduction to xanthene (20) followed by reoxidation to give xanthone (16). Alternatively, methylation ...  Read More

3. SYNTHESIS AND PHARMACOLOGICAL EVALUATION OF N-METHYL PIPERIDINE ANALGESICS
Volume 4, Issue 4 , Autumn 1993

Abstract
  Pain is probably the immediate stimulus for more visits to the Physician's office than all other complaints combined. Since pain serves as an alert to injury, it is often the first harbinger of disease. Piperidine has been extensively utilized for the synthesis of a wide range of therapeutic agents ...  Read More

4. SYNTHESIS OF 2-PROPYLANTHRALIN AND 2,7-DIPROPY LANTHRALIN VIA REDUCTIVE CLAISEN REARRANGEMENT OF ALLYLOXYANTHRAQUINONES
Volume 4, Issue 4 , Autumn 1993

Abstract
  Reductive Claisen rearrangement of 1-allyloxy-8-methoxy-9, 10-anthraquinone followed by demethylation and reduction, and of 1,8-bisallyloxy-9,lO-anthraquinone followed by reduction provides regiospecific syntheses of 2-propyl- and 2,7-dipropyl anthralin  Read More

5. POSITIVE AND NEGATIVE ION MASS SPECTRA OF RING - SUBSTITUTED NITROBENZENES
Volume 4, Issue 4 , Autumn 1993

Abstract
  The 70 ev positive and negative ion mass spectra of ring-substituted nitrobenzenes were studied. The influence of the substituent group on the fragmentation modes of the molecular ions is discussed. The effect of pressure in the formation of negative ions was also studied. As expected, the ratio of ...  Read More

6. A KINETIC STUDY OF THE DECOMPOSITION OF PYRIDINE CHROMIUM (VI) PEROXIDE WITH ALCOHOLS
Volume 4, Issue 4 , Autumn 1993

Abstract
  A kinetic study of the decomposition of pyridine chromium peroxide with methanol, ethanol, propanol and isopropanol has been made over the temperature range 25 to 40°C. It is found that the ligand exchange stage is the rate determining step in the oxidation process. The activation parameters E , ?H‡ ...  Read More

7. HYDROCHEMISTRY OF KARST SPRINGS FROM TWO CARBONATIC UNITS IN ZAGROSIDES OF IRAN
Volume 4, Issue 4 , Autumn 1993

Abstract
  One hundred and nineteen karst springs, all with electrical conductivity of less than 500 gmhosfcm, discharging two carbonatic aquifers in Zagrosides of Iran are chosen and studied. The results indicate that the lithology of each unit is well reflected in the chemistry of the springs and the overall ...  Read More

9. TWO PHOTON TRANSITIONS IN THE OPTOGALVANIC SPECTRUM OF NEON
Volume 4, Issue 4 , Autumn 1993

Abstract
  Seventeen two-photon transitions for neon have been observed in the 580- 635 nm spectral region for use in the spectroscopic study of its higher excited levels, which are not accessible by one-photon absorption. To compare the two and one-photon absorption signals originating from the same lower level, ...  Read More

11. [6 + 2] AND [4 + 2] CYCLOADDITION REACTION OF DIPHENYLKETENE AND CYCLOHEPTATRIENE
Volume 4, Issue 4 , Autumn 1993

Abstract
  The cycloaddition reaction of diphenylketene and cycloheptatriene is studied. The reaction proceeds via a highly asynchronous reaction path to the zwitterionic 6 as intermediate. Subsequent CC- bond formation yields 8, 8 diphenylbicyclo [4. 2. I] nona-2, 4-dien-7-one (1) and 7,7-diphenylbicycol [3.2.2] ...  Read More

12. STUDIES IN CARBOTRICATIONS: PREPARATION AND CARBON-13 NUCLEAR MAGNETIC RESONANCE SPECTROSCOPIC STUDY OF 3,7,9-TRIHYDRO TETRACYCLO [3.3.1. 0 . 0 ] NONANE-3,7,9 TRIYLTRICATION: A TRIPROTONATED TETRACYCLO-[3.3.1.0 . 0 ] NONANE-3,7,9-TRIONE AND ATTEMPTED PREPARATION OF RELATED TRICATIONS
Volume 4, Issue 4 , Autumn 1993

Abstract
  Synthetic approaches have been described for the preparation of precursors to triasterane trications and related carboxenium ions. The investigation on carbocationic intermediates from treatment of these precursors with FSO H/SbF /SO CIF system has led to the preparation and 13C-NMR spectroscopic ...  Read More

13. PREPARATION AND MOLECULAR STRUCTURE OF BIS (TETRAMETHYLETHYLENEDIAMINE) COPPER(I) DICHLORO CUPRATE(I) , [Cu (TMEDA) ] [CuC1 ]
Volume 4, Issue 4 , Autumn 1993

Abstract
  A complex of N, N, N', N', -tetramethylated ethylenediamine, TMEDA, with CuCI is prepared. The crystal and molecular structure of this complex is characterized by a single-crystal X-ray diffraction study. The complex is found to contain [Cu (TMEDA) ] cation which is nearly tetrahedral and the [CuCI ...  Read More