VOLUME 5, NO4, DEC 1983

Chelates of Nickel (II) with certain polyaminocarboxylic acids

Ten chelates of Nickel (II) with different polyaminocar­boxylic acids which were successful in removing nickel from body organs (in vivo) and from their sub-cellular fractions (in vitro) of experi menta lly poi soned rats,. were prepa red and cha ra teri sed. Thei r structure has been i nvesti gated on the bas is of infra red spectra 1 and magneti c moment data. The experimental data suggest that all the complexes are tetra-co-ordinated with sp3 hybridization having tetrahedral geometry. read more

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S K TANDON ,A K MATHUR ,

Identification of the Intermediate in the Reaction of Primary Nitroalkanes with Acetic anhydride in the Presence of Sodium acetate

The reaction of pri ma ry ni troa 1 kanes with acet i c anhydri de and sodium acetate has been studied in the presence of dipolarophiles and the formation of nitrile oxide as a reaction intermediate has been proved by its cycloaddition reaction with the dipolarophiles to give isoxazolines.read more

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M YOUNAS ,A RAHMAN ,N A KHAN ,

Synthesis of Benzazole N-Mannich bases and 4- [N - (Morpholinol piperidino) phenyliminoJ -?--indolinones as Potential Anthelmintic Agents

A seri es o·f 3[4-( N-morpho 1 i no/pi peri di no )phenyl ami nomethyl ]-benza­zoles (IV.VII) and 4-[N-(morpholino/piperidino)phenylimino]-2- indolinones (VI) has been synthesised and screened for their anthelmintic activity against ~.nana and ~.brasiliensis.read more

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R PRALASH ,R S VARMA ,

Synthesis of methyl 4-methyl amino-6-deoxy- 3-C-methyl 2.3-di-O-methyl- ex - D-altropyranoside

Synthesis of methyl 4-methyl amino-6-deoxy- 3-C-methyl 2.3-di-O-methyl- ex - D-altropyranosideread more

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N HONG ,A U RAHMAN ,J YOSHIMARA ,

Some Reaction With 7-Hydroxy-3-Carbethoxycoumarin

In continuation of our previous work on 3-carbethoxycoumarin [I), we are dealing in this paper with the reaction of 7-hydroxy-3-carbetho­xycoumarin (1) with hydrazines, amines and Grignard reagents. Some reagents affected fission of the coumarin ring while others reacted with the carbet­hoxy group.read more

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MM MOHAMED ,M A HASSAN ,M EL BORAI ,

Spectrophotometric Studies on the Composition and Stability of Palladium(II) Chelates with 4-( 2- Pyridylazo) - Resorcinol (PAR)

The formation, composition and stability constants of palladium (II)chelates with 4-(2-pyridylazo)-resorcinol have been studied by spectro­photometric measurements. Two red coloured chelates 1:1 and 3:2 (Pd: PAR) are formed at pH 4.0 and 10.5 with maxs. 490 nm and 520 nm and their log K values are found to be 4.9 and 21.7 respectively.read more

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R S SAXENA ,KK SAXENA ,

Determination of Periodate in the Presence of Iodate

A method for the determi na ti on of peri odate in the presence of iodate based on its oxidation o~4Phthalophenone (reduced pheno1phthalien) is described. As small as lxlO M of the periodate can be determined by measuring the absorbance of the pink colour at 553 nrn.read more

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S A AL TAMRAH ,

Measurements of IoniceConductivity of Silver Fluoride-doped Silver Phosphate

The present work deals with the study of electrical conductivity of the system(AgP03)1 -(AgF)                                                    in the range 0.2~x~0.9 mole fraction by                   -x      x method of comp 1 ex impedance. Conduct i vity 'measurements were carri ed out between 70·C & 240·C. We observed a large increase of conductivity due to the doping effect by AgF. A maximum conductivity appears at X=0.8 mole fraction corresponding to a minimum activation energy(E =0.548 ev). Similar behaviour of maximum conductivity corresponding to a minimum activa­tion energy has been observed in other solid electrolytes based on Agl [1,2,7,12,13]. read more

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AA RIKABI ,A HAMMOU ,

The Crystal Structure of Germanium (II. IV) Phosphinate. Ge2 ("2P02) 6

The crystals are trigonal-rhombohedral,space-group R 3,a= 11.86(l),c=9.58(l) A. Successive centres of symmetry along care occupi;d alternately by GelV and disordered GelI atoms, which are li-;;-ked by triple                                                IV                                    II Ge-O-P-O-Ge bridges(Ge -0,1.869; mean Ge -0,2.32 A). read more

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T J R WEAKLEY ,

Alkaloids of Berberis aristata - isolation of aromoline and oxyberberine

Five alkaloids have been isolated from "rasaut", an extract of the root bark of Berberis aristata, which have been characterized as aromo­line, oxyberberine, oxyacanthine, berbamine and berberine chloride. read more

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A U RAHMAN ,A A ANSARI ,