Synthesis, Spectral and Kinetic Study of Demi-macrocycle of N 2 O 2 with Complex of Co (II) Ion

Macrocyclic metal chelating agents are useful for detecting tumor lssions. 4,5 The chemistry of macrocyclic complexes is also important due to their use in dyes and pigments as-well-as in study of NMR shift reagents etc. 2. EXPERIMENTAL All reagents and solvents used in the present investigation were of analytical grade. 1,2diaminoethane, perchloric acid (HClO4), acetone (CH3COCH3) etc. of Loba, Merck and Aldrich brand. The preparation of solutions, standardization, and procedures for demi-macrocyclic complex formation and their spectral kinetic studies have been performed. The carbon, hydrogen and nitrogen analysis of the samples were carried out microanalytically. Oxygen was determined by different methods. Metal and chloride were determined gravimetrically. The IR spectra (4000-400 cm -1 ) was recorded on a Jasco model 4100 FTIR spectrometer as KBr discs. UV-visible spectra was recorded on a shimedzu 1700 pharmaspectrometer. Conductivity measurements were made in DMSO or nitromethane (10 -3 mho) at room temperature on systronics conductivitymeter. Magnetic susceptibility was measured at 8000 G in a Evans magnetic susceptibility balance using Co[(Hg(SCN)4)] as calibrant and the experimental susceptibilities were corrected for diamagnetic correction with pascal constants.