The synthesis physical nature and spectroscopic characterization of
several phthaloylamino acids (ligands) have been carried out.
Initially, series of two different types of complexes are produced
i.e. A-type: Monomeric dibutyltin diphthaloyl-N-carboxylates with
2:1 molar ratio of general formula [C6H4(CO)2NRCOO]2SnBu2, B-type:
Dimcric tetraorgano dibutyl distannoxane diphthaloyl-N-carboxylates
with 1:1 molar ratio of general formula [{C6H4(CO)2NRCOO-SnBu2}2O]2
Where R = -CH2,-C2H4, -C4H7, -C5H9, -C2H3C6 H5, -C2H3 C6H5OH. They
are characterized by CHN analyzer, FTIR, 1H-, 13C-,
l19Sn-multinuclear FTNMR and Mössbauer Spectrometer. The monomeric
dibutyltin diphthaloyl-N-Carboxylates complexes behave as hexa-
coordinate and possess trans octahedral geometry. The dimeric
tetraorgano dibutyl distannoxane diphthaloyl carboxylate complexes
have penta coordinate environment with a pair of exo- and
endo-cyclic structure having fluxional behavior of organic
moieties. It is found that most of the mono and dimeric compounds
are biocidally active as well as the triorgano- tins show high
biocidal activity against various bacteria and fungi.
DR. MUHAMMAD ASHFAQ, Obtained his Phd in Islamia University, Bahawalpur, Pakistan(1999), MSc.Gomal University, D. I. Khan, Pakistan.(1985).He is working as Associate Professor (Inorganic Chemistry) Department of Chemistry, Islamia University, Bahawalpur, Pakistan
