The spectral characteristics of the iron(III) lactate complexes were examined by the spectrophotometric methode, and the absorbance of these complexes has been studied at diferente wavelengthes .
The stoichiometry of the photoreactive complex formed
in the iron(III)-lactate system has been investigated in aqeuous solution under determinative experimental conditions. Initial concentrations whether of Iron(III) or of lactic acid ranged from to , and -values were belonging to the range .
The results showed, that the ratio of iron(III) to lactate in the photoreactive complex is 1:2, i.e. its formula is .
This complex has a maximum absorption at 365 nm. Its molecular absorption coefficient is about ≈ and its dissociation constant is about .
The tentative mechanism for the photochemical decomposition of the complex has been suggested, in agreement with the reference studys . The suggested mechanism depends on the relationship between the absorbance and the photoreaction kinetics, and it is not based on the qualitative or quantitative analysis of reaction products.
The Reaction of Glycerol carried out with tow aryl halides
under basic conditions (K2CO3) using 5 mol% of Pd(II)Complex as
catalyst, Pd(PPh3)2Cl2. The typical reaction has been performed
between glycerol and bromobenzene. This reaction is achieved
in
water as solvent. However, the catalyst complex does not dissolve
in aqueous solutions rather it acts as heterogeneous catalyst.
Therefore, it is filtrated at the end of the reaction and reused several
times. Accordingly, new compound were prepared by reacting
glycerol with 1-bromo-2,6-dichlorobenzene. It is anticipated that the
synthesized compounds may have pharmaceutical application.
A new ligand has been synthesized : 3-(2,6-
diisopropylphenylimino) Butan – 2 – one Oxime , and then
this ligand has been reacted with bivalence metal chloride
MCl2.
درست بعض الخواص الفيزيائية و الطيفية للمرتبطتين و المعقدات المصطنعة بواسطة
تقانات مطيافية الأشعة تحت الحمراء و الطنين النووي المغناطيسي البروتوني و الكربوني،
إضافة إلى التحليل العنصري، إذاً بينت نتائج هذه الدراسة أنها كانت متفقة مع الصيغ
التركيبية و البنى المقترحة لهذه المعقدات.
Aseries of mixed acetyldicyanomethanide amine complexes of some bivalent 3d-metals.Infrared spectroscopic IR and UV investigations are indicating that the ambident acetyldicyanomethanide ligand shows an unusual variability of the preferred donor atom
. O-or N-coordination of the
monodentate anionic ligand in the tetra –pyridine complexes as well as a bridging function of the acetyldicyanomethanide ligand in the polymeric octahedral or distorted octahedral di-pyridine complexes preferrably with .
Five derivatives of Formazn (FM1–FM5) were prepared through reaction between
benzaldehydphenylhydrazone with five diazonium salts by a reaction ratio of 1:1 in
alkaline medium. The hydrazone was prepared through the reaction between
phenylhydrazin
e and benzaldehydeby a reaction ratio of 1:1 in a slight acidic medium.
Crystals of formazans resulting from recrystalization were formed by using different
solvents and show variation of solubility among these formazans according to the kind of
the solvent and the kind of diazonium salt used. Their purity was studied by using thin
layer chromatography. The melting point of the prepared hydrazone and the resulting
Formazan complexes were complexes with lead (II), copper(II) and cadmium were
successfully prepared and studied by using UV and IR spectroscopy. These complexes
were used as ionophors and applied as electrically active materials in the preparation of
ion-selective membranes for the mentioned metal ions.
The heterocyclization of unsaturated nitriles and ethyne catalyzed by
cyclopentadienyl - ١،٥ - cis, cis-cyclooctadiene-cobalt (I) and promoted by light
has been studied in toluene as solvent.
Acrylonitrile and substituted acrylonitriles gave satis
fying results
interesting for the preparation of ٢-vinylpyridines.
No reaction was observed using fumaronitrile, maleonitrile and
allycyanides.
(E)/(Z)-ratio of reactants and products seems not to be influenced within the
reaction.
A openchained Bispyridyl ether has been synthesized using ٢،٢- bis
[٢-cyanoethoxy]- diethylether as an intermediate from the reaction of
acrylonitrile with Diethylene glycol
The heterocyclization of ٢،٢- bis [٢-cyanoethoxy]- diethylether and
acet
ylene catalyzed by cyclopentadienyl-١،٥-cis,cis-cyclooctadiene-cobalt(I)
and light has been studied in toluene as solvent.
The Nitrile gave results of interest in the preparation of the openchained
bispyridyl ether compound ٢,٢-bis [٢-pyridylethoxy]-deithylether.
