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Volume 3, No. 4, December 2008, Thu Al-Hijja 1429 H

Articles

 

 

Synthesis of some 1,2,4-Triazolyl-1,2,3-Triazole Derivatives:
(1,3-Dipolar Cycloaddition Reaction)

Text Box:  

 

 

 

Sultan T. Abu-Orabi*, Nuha A. Abu-Naaj, Sami Klaib, Lo´ay Al-Momani, Ibrahim Jibril

JJC, 2008, 3(4), 337-347

Synthesis of Fused Pyrimidines from Nitroarenes

via ortho-Nitroaromatic Carboximes


A synthesis of functionalized fused pyrimidine derivatives from the respective ortho-nitroaroma­tic carboximes is described.

 

Stanisław Ostrowski*

JJC, 2008, 3(4), 349-355

Synthesis of 10H-Phenothiazines, their Sulfones and Ribofuranosides as Potential Chemotherapeutic Agents

10H-phenothiazines are prepared by Smiles rearrangement. These prepared phenothiazines are used as base to prepare ribofuranosides by treatment with b-D-ribofuranosyl-1-acetate-2,3,5-tribenzoate. 10H-Phenothiazines on refluxing with hydrogen peroxide in glacial acetic acid gave 10H-phenothiazine-5,5-dioxides. Their antioxidant and antimicrobial activity have been carried out. The structure of the synthesized compounds have been established by spectroscopic data.

 

 

Rahul Dixit*, Naveen Gautam, D.C. Gautam

JJC, 2008, 3(4), 357-365

Catalytic Dimerization of Propene with Diiminophosphorane Nickel(II) Complexes in the Presence of Phosphine Additives

A series of 16 diiminophosphorane nickel(II) complexes was synthesized and used as catalyst precursors for dimerization reactions of propene. The performance of the corresponding catalyst depends on the nature of the additive, the ligands and the temperature.

 

Helmut G. Alt*, Katharina J. Schneider, Edith Funk

JJC, 2008, 3(4), 367-379

Intermolecular Interactions in the Crystal Structure of
Bis(4-methylcyclohexylammonium) tetrabromocuprate(II)

The crystal structure of (4-methylcyclohexylammonium)2[CuBr4] is reported. Intermolecular interactions and crystal supramolecularity were discussed.

 

 

Rawhi Al-Far, Basem F. Ali*, Salim F. Haddad

JJC, 2008, 3(4), 381-387

PES of C4H9+ Structural Isomers and Determination of the Global Minima of XC3H6+ (X = Li to Br) via G3 Calculations

π-Bridged

X = Groups I, II, AlH2, GaH2, SiH3 and GeH3

α-Substituted

X = NH2, PH2, Groups VI and VII

Bisected

X = BH2, CH3 and AsH2

 

 

Mustafa R. Helal*, Akef T. Afaneh

JJC, 2008, 3(4), 389-407

Thermodynamics and Kinetics of Co (II) Adsorption onto Natural and Treated Bentonite

The present study examined the application of a commercial natural bentonite (untreated, NB) for the removal of Co (II) ions from aqueous solutions. The data demonstrated that the amount of Co (II) adsorbed on bentonite increases rapidly during the first hour, thereafter adsorption becomes linear with time. Pseudo-second-order model described best the kinetics of the reaction.

Effect of contact time on Co (II) adsorption onto NB (Co (II) concentration 200 mg/L, 25οC and NB dose = 10 g /L

 

W. K. Mekhemer, J. A. Hefne,  N. M. Alandis*, O. A. Aldayel, S. Al-Raddadi

JJC, 2008, 3(4), 409-423

Normal and Twisted Intramolecular Charge Transfer (TICT)
Fluorescence of P-(N,N-diphenylamino)benzoic acid methyl ester (DPABME) in Various Solvents

The steady state fluorescence of P-(N,N-diphenylamino)benzoic acid methyl ester (DPABME) in ethanol is broad and is composed mainly of the intramolecular charge transfer (ICT) band ~490 nm and a shoulder ~400 nm due to normal fluorescence of charge transfer character. In acetonitrile only the long fluorescence (ICT) band ~480 nm could be observed. In n-butylchloride, only the short fluorescence ~420 nm could be observed. The competition between the two fluorescence bands is discussed and confirmed by fluorescence decay, time resolved fluorescence (TRF) spectra and red edge effect (REE) results.

 

Khader A. Al-Hassan*, Ideisan I. Abu-Abdoun, A. Suwaiyan, Yaser A. Yousef

JJC, 2008, 3(4), 425-432

 

Formulation of Modified Microspheres Based on

Cyclodextrin-Lactic Acid Polymers

Polymers based on Poly L-lactic acid (L-PLA), and coupled with b-Cyclodextrin (b-CD), 3,  have been synthesized and used for the preparation of microspheres for drug encapsulation. Amphotericin B (AmB), a polyenic antifungal molecule, has been incorporated in L-PLA coupled with b-CD microspheres. The maximal quantity of AmB encapsulated, reported to 100 mg of the microspheres, was 7.2 mg (encapsulation ratio 60% by mol).

 

Rima Kassab*, Noha Ghanem, Paolo Yammine, Hatem Fessi, Hélene Parrot-Lopez

JJC, 2008, 3(4), 433-437