INTERNATIONAL JOURNAL OF CHEMICAL AND PHYSICAL SCIENCES

11-21

Authors: MEENAKSHI SHARMA*, VATSALA SONI, VANDANA SINGH

A ‘chemistry driven approach’ to the synthesis of small molecules of medicinal interest was launched to explore the versatility of 3-benzoylmethyl indolin-2-one (3) (resulted on the reaction of isatin with acetophenone followed by reduction of the obtained enone derivative 2 with Na2S2O4 ) to provide synthetically acceptable protocols to the formation of indolin-2-one analogues substituted on its 3-position with pyrimidine derivatives (7- 12) respectively whose structure was unequivocally established from its micro analyses and spectral data.

35-43

Authors: DR. PILLAI PRAMODA SASIDHARAN

In the field of coordination chemistry, extensive studies have been carried out on metal complexes formed by ligands having dual sites for coordination. Of these, thiosemicarbazides having N and S as donor atoms deserve a special mention. Interest in thiosemicarbazones (derivatives of thiosemicarbazides) as ligands mainly developed due to their flexibility which led to extremely variable behaviour in their reactions with transition and non-transition metals. Literature studies show that thiosemicarbazones exhibit a wide range of stereochemistry on complexation with transition metal ions. Technological advances have led to the development of sophisticated and sensitive instrumentations which provide avenues to probe into the structure and bonding in the complexes. Hence new metal complexes have been synthesised using chloride salt of Cobalt and thiosemicarbazone obtained by variation of the parent carbonyl compound. Magnetic and spectral studies have been carried out to obtain information regarding effect of coordination on the central metal ion (oxidation state in particular) and stereochemistry exhibited by these complexes.

52-69

Authors: VISHAL SAINI* , HARISH KUMAR

Industrialization and modernization in now a days has made a strong demand of steel and their maintenance for a strong infrastructure for every country in the race of survival, stabilization, growth and competition. Atmospheric corrosion can aggressively accelerate the rate of degradation of steel during their manufacturing, processing, storage and transportation. In these cases, traditional methods to prevent corrosion are not suitable which provide scope of Vapour Phase Corrosion Inhibitors (VPCI) in industries, defense and daily life. Cetyltrimethylammoniumbromide (CTAB) was tested for mild steel in different aggressive atmospheric conditions by Weight loss test, Eschke test, Salt spray test, Sulphur dioxide (SO2) test at 50oC and results of these tests were supported by Metallurgical research microscopy and Scanning electron microscopy (SEM). Synergistic effect of CTAB were performed with Ethylamine (EA), N,N,N,NTetramethylethylenediamine (TMEDA) and N-Ethylaniline (NEA) to enhance the percentage corrosion inhibition efficiency (PCIE).

82-87

Authors: P.S.CHAUDHARI

Densities and viscosities of glucose at constant temperature have been measured from experimental data. The apparent molar volume ( ), relative viscosity (nr) were calculated by using Jones-Dole equation. The results show strong ion-ion interaction that indicates for the observed viscosity concentration dependence of dilute electrolyte solutions

95-104

Authors: V. K. MADHU SMITHA RANI

Irradiation of sunflower (Helianthus annus.L.) seeds to magnetic fields (MF) have influence on physiological processes. Seeds exposed to 500 μT for 48 hrs showed an enhancement of 24% in germination on day 3. The experiments carried out show that seeds previously treated with magnetic fields have increased water uptake, which may be the reason for the enhanced percentage germination and growth rate. The physical state of water in the seeds of both control and exposed groups were examined using nuclear magnetic resonance (H1 NMR) spectroscopy & imaging during imbibitions. NMR images of water distribution and proton transverse relaxation time (T2) were recorded during the first 15 hrs of imbibitions. NMR images reveal that hydration during this period is a multistage process. Higher concentration of water in the radical of treated seeds revealed that water penetration into the seed is more in treated seeds which must have contributed to faster germination and growth.