Chemistry - Sciene

This work involves synthesis of different five and six membered heterocyclic rings starting from oxalic acid and divided into four different parts and the reaction steps for each part are summarized as shown below.

First part:

    This part involved the synthesis of pyridazin ,phthalazin, pyrazole ,pyrazolone and triazole derived from oxalic acid hydrazide .Scheme (I).

Second part:

This work involves the preparation of two liquid crystalline compounds, 4,4^´-bis-(4-propoxybenzylidene amino)biphenyl (2_b), and 2,5-bis-[4-(4^´-propoxybenzylideneamino)phenyl]1,3,4-oxadiazole (1_f).The prepared compounds were characterized qualitatively by using FTIR, ¹HNMR, and elemental analysis (EA).

          Two neutron activation analysis systems were designed and studied. Americium-beryllium (Am-Be) was employed as a neutron source in both systems. Two different types of neutron sources (which differ in neutron flux) were used. One of them was used paraffin moderator  which was theoretically simulated using Monte Carlo method by GEANT4 package program of objective oriented programming.