Indian Journal of Chemistry

Sect. A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical

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VOLUME 49A

NUMBER 12

December 2010

CONTENTS

Papers

 

1579

 

Theoretical study of HF elimination kinetics of ethane fluorides and derivatives [C2H6-nFn (n = 1-4)]

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Abolfazl Shiroudi* & Ehsan Zahedi

 

 

 

 

Thermal decomposition kinetic of ethane fluorides has been studied at the DFT levels of theory. Activation parameters obtained with the B3PW91/6-31++G** method are in good agreement with the experimental value Polarization of the Cl-F3 bond is rate determining in the HF elimination reaction .NBO analysis suggests that the HF elimination occurs through a concerted and asynchronous four-membered cyclic transition state.

 

 

 

 

1586

 

Selective epoxidation of styrene with air over
Co3O4-MOx and CoOx-MOx/SiO2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X-H Lu, J Lei, D Zhou, S-Y Fang, Y-L Dong &
Q-H Xia*

 

 

 

 

Composite Co3O4-MOx and CoOx-MOx/SiO2, prepared by direct calcination, are found to be considerably active for the epoxidation of styrene with air in DMF under mild conditions. A substrate conversion of 86.6 mol % with an epoxide selectivity of 79.4 % is achieved at 373 K over 15 mg of 10:1 Co3O4-SnOx oxide catalyst, and is superior to other Co3O4-MOx catalysts.

 

 

 

 

 

1593

 

Characterization and photocatalytic activity of
SiO2-TiO2 mixed oxide nanoparticles
preparedC by sol-gel method

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ali Mahyar*, Mohammad Ali Behnajady &
Naser Modirshahla

 

 

 

 

The SiO2-TiO2 mixed oxide nanoparticles prepared by the sol-gel method, show higher photocatalytic activity than pure, synthetic TiO2 and Degussa P25 (7.9 and 3.27 times higher respectively) in the degradation of new fuchsin. Maximum activity is obtained with 40% SiO2-TiO2 mixed oxide calcined at 600 C.

 

 

 

Notes

 

1601

 

Synthesis and characterization of a new
nickel(II) mixed ligand complex with
2-(2
-pyridyl) benzothiazole

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R N Patel *, Anurag Singh, K K Shukla,
Dinesh K Patel & V P Sondhiya

 

 

 

 

A new complex, [Ni(L1)(L2)(H2O)], has been synthesized and characterized by X-ray crystallography. The metal center is coordinated through azomethine nitrogen, pyridine nitrogens, carbonyl oxygen and one nitrogen atom of L1.

 

 

 

 

1607

 

Synthesis and structure of tris (acetylacetonato) aluminum(III)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Manisha Shirodker, Vrinda Borker*, C Nather,
W Bensch & K S Rane

 

 

-

 

Tris(acetylacetonato)aluminium(III), [Al(C2H7O2)3], used as a precursor in vapor deposition of aluminum oxide, has been prepared by treating industrial alum, Al2(SO4)3.16H2O, with an ammoniacal solution of acetylacetonate. The compound crystallizes in the monoclinic space group P21/c and all atoms are located in general positions.

 

 

 

 

 

 

1612

 

Molecular interactions in binary mixtures
of 2-aminoethanol with 1,4-dioxane and dimethyl sulphoxide investigated by static permittivity measurements

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R J Sengwa*, Vinita Khatri & Shobhna Choudhary

 

 

 

 

Excess static permittivity confirms the 2:1 complexation of
2-aminoethanol with 1,4-dioxane with decrease in number of parallel aligned dipoles, whereas 2-aminoethanoldimethyl sulphoxide forms the 1:1 complex with increase in parallel aligned dipoles in their mixtures.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1617

 

2,7 Dichlorofluorescein, a fluorescent sensor to detect Cd2+ over Na+, K+, Ca2+, Cu2+, Ni2+ and Zn2+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Priyanka Goswami, Sukanya Baruah &
Diganta Kumar Das*

 

 

 

 

Fluorescence of 2,7-dichlorofluorescein has been monitored in 1:1 (v/v) CH3OH:H2O on interaction with metal ions, viz., Cd2+, Zn2+, Na+, Cu2+, Ca2+, Ni2+ and K+. The Cd2+ ion increases the fluorescent intensity of 2,7-dichlorofluorescein more than the other ions.

 

 

 

1621

 

Annual Index

 

 

 

 

Authors for correspondence are indicated by (*)