الفهرس 
contentsOnly 14 pages are availabe for public view
 |  | from | 142 |  |  |
| | | from | 142 | | |
Abstract
I’
This thesis comprises three chapters, the first of which deals with a general
review on the reactivity of coordinatively unsaturated metal complexes towards
imidazole and pyrazole. This chapter also includes the aim of investigation and
statement of the problem.
The second chapter is devoted to a detailed discussion of the results
obtained throughout the work and contains three main parts. The first part deals
with the synthesis and characterization of some copper(II) and nickel(II) complexes
derived from, N-salicylidene-S-methylhydrazinecarbodithioate [H2Sal.SCH3],
N-salicylidene-S-benzylhydrazinecarbodithioate [H2Sa1.SBz] and N-salicylidene
hydrazinecarbothioamide [H2Sal.NH2]’ The reactivity of these complexes towards
some Lewis bases such as imidazole and pyrazole is also discussed in this part.
The isolated copper(JI) and nickel(II) complexes derived from the reactions
of copper(II) acetate and nickel(II) acetate with N-salicylidene-S-methyl - and
S-benzylhydrazinecarbodithioate as well as N-salicylidene hydrazinecarbothioamide
using I: I molar ratio were reinvestigated and the dimeric complexes were isolated
and characterized by elemental analysis as well as I.R spectra .. The ultraviolet-
visible spectra imply square planar structures and confirm the dimeric nature of
these complexes.
The reaction of dimeric copper(II) and nickel(II) complexes of
[{M(Sal.SCH)) h] , [ {M(Sal.SBz) hJ and [ {M(Sal.NH2) hJ where M is Cu or Ni with
imidazole (HIm) using (I: I) molar ratio afforded the corresponding monomeric
imidazole adducts [M(Sal.SCH3)Hlm], [M(Sal.SBz)HIm] and [Ni(Sal.NH2)HIm].
These adducts have been characterized by elemental analysis, JR, UV -Visible, and
’Hnmr spectra.
The reaction of [{Cu(Sal.SCH3h}] with imidazole (HIm) using (1: I) molar
ratio in presence of KOH proceeded with the deprotonation of the imidazole and
eventually gave the irnidazolate bridged binuclear copper(IJ) complexes of the
formula K[ {Cu(Sal.SCH.~)b Irn]. This imidazolate copper(II) complex has been
characterized by elemental analysis, IR, UV - Visible spectra. Variable temperature
magnetic susceptibility measurements over the temperature range (4.2-297° K).