January 2011

Characterization of caffeine and determination of caffeine in tea leaves using uv-visible spectrometer

In this research, characterization of pure caffeine and the method for determination of caffeine content in twelve commercial tea leaves have been reported using UV-visible spectrometer. The optical transition properties of caffeine were measured in different solvents (dichloromethane, water, chloroform and ethyl acetate). The results show that, caffeine has highest optical transitions in dichloromethane than the other...

Author(s): Tadelech Atomssa and A.V. Gholap

January 2011

Synthesis of 4-(2-Indenylethyl)morpholine and their cationic transition metal complexes

The amido tethered ligand 4–(2–indenylethyl)morpholine (6) have been prepared in high yield (71%). All the compounds were fully characterized by NMR, IR, Mass Spec. and Microanalysis. Treatment of the lithio salt of (6) with TiCl4:2THF in THF afforded the new complex 4–(2–indenylethyl)morpholinetitanium dichloride (7a) in 26% yield as viscous green oil while, treatment with ZrCl22THF gave...

Author(s): Gloria Ukalina Obuzor and Brian L. Booth