الفهرس 
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Abstract
The N.Aroyi-n-phenyihydrazine Ia-c were prepare by reacting phenyihydrazine with aroyi chioride in pyridine.
In the present thesi~ we reported the result of Our
arylhydrazidoyl chloride 2a-c and N-arylpyruvohYdraz-
azoles inorder to define the exact behaviour of 2a-c and
3a,b toward this class of compounds
Amino-2-pyrazolin-5-one 8 reacted with. e.g, 2a to
yield a product with molecular formula Ce9 H20CkNsO • Two theretical possible. isomeric structures 9 and 10 W81-C
out based on IR and HNMR Spectra of the product as with
as its chemical behaviour. The IR spectrum revealed -1
absorption at 1690 em for ring carbony] C-O group w”h8rc-
as the HNMR spectrum showed no pyrazole C-4H Signal at 0
6.0 ppm.. Furthermore the reaction product proved to be
stable under condition~reported to effect d~compostion of
N-Substituled pyrazoles of structure similar to that of
10_The format~on of,§ is assumed to proceed via reaction of
8 wi th two mo I ocu I es of 2b· and el imi na ti on .of ammon i a