American Journal of Chemical Research


ORGANODIPHOSPHINES IN PtP2X2 (X = Br or I) DERIVATIVES – STRUCTURAL ASPECTS

Review Article of American Journal of Chemical Research ORGANODIPHOSPHINES IN PtP2X2 (X = Br or I) DERIVATIVES – STRUCTURAL ASPECTS Milan Melník and Peter Mikuš Department of Pharmaceutical Analysis and Nuclear Pharmacy, Faculty of Pharmacy, Comenius University in Bratislava, Odbojárov 10, SK-832 32 Bratislava, Slovak Republic Toxicological an Antidoping Center, Faculty of Pharmacy, Comenius University in Bratislava, Odbojárov 10, SK-832 32 Bratislava, Slovak Republic This review covers twenty eight monomeric Pt(η2-P2L)X2 (X = Br or I) derivatives. These complexes exist in cis- as well as trans-configurations from which the complexes with cis-configuration are more common. The organodiphosphines create wide varieties of the metallocyclic rings PNP, PC2P, PC3P, PNCNP and PC4OC4P. The mean values of Pt-L bond distances in cis-complexes are: 2.230 Å (P), 2.490 Å (Br) and 2.240 Å (P) 2.666Å (I), respectively. In the trans-complexes the values are 2.319 Å (P), 2.429 Å (Br) and 2.320 Å (P), 2.615 Å (I). The Pt-X bond distances in the cis- as well as in the trans-derivatives elongate with the covalent radius of the X atom. In addition in the cis-derivatives the Pt-X bond distances are longer than those in trans-derivatives, as a reason of higher trans-influence of P over the respective halogens. Some of the complexes are examples of distortion isomerism. Finally, the structural data of Pt(η2-P2L)X2 (X = Br or I) are compared with the values of Pt(η2-P2L)X2, complex and discussed. Keywords: Structure, Pt(η2-P2L)X2 (X = Br or I), distortion isomers ...

Synthesis of Bicyclic Adduct through Regioselective Baeyer-Villager oxidation

Research Article of American Journal of Chemical Research Synthesis of Bicyclic Adduct through Regioselective Baeyer-Villager oxidation Bello Y. Makama* and Wahidullah Azizi Division of Mathematics, Sciences & Technology, American University of Afghanistan, Darul-Amman, Kabul, Afghanistan Baeyer-Villager oxidation reaction has become accepted as a right approach in the ring expansions for the preparation of both bicyclic and tricyclic lacotnes; however, successful application of the regioselective Bayer-Villager oxidation protocol to the synthesis of particularly congested scaffolds remains distinctly tricky. Herein the Baeyer–Villiger oxidation of Bicyclo[3.2.0]hept-3-ene-6-one is studied with oxygen insertion leading to the functionalized oxabicyclic adduct with complete regioselectivity. Keywords: bicyclic adduct, regioselectivity, Bayer Villager oxidation, synthesis ...

Organodiphosphines in Monomeric PtP2X2 (X = OL, NL, CN, BL) Derivatives Structural Aspects

Review Article of American Journal of Chemical Research Organodiphosphines in Monomeric PtP2X2(X = OL, NL, CN, BL) Derivatives Structural Aspects Milan Melník, Andrea Forgácsová, Peter Mikuš Comenius University in Bratislava, Faculty of Pharmacy, Department of Pharmaceutical Analysis and Nuclear Pharmacy, Odbojárov 10, SK-832 32 Bratislava, Slovak Republic Comenius University in Bratislava, Faculty of Pharmacy, Toxicological and Antidoping Center, Odbojárov 10, SK-832 32 Bratislava, Slovak Republic In this review are classified and analyzed structural parameters of over seventy examples of monomeric PtP2X2 (X = OL, NL, CN or BL) derivatives in which P donor ligands are organodiphosphines. These complexes crystallize in four crystal systems: tetragonal (x1), triclinic (x11), orthorhombic (x19) and monoclinic (x40). The complexes were divided into the two groups: Pt(η2-P2L)(XL)2 (X = O, N, CN or B) and Pt(η2-P2L)(η2-X2L) (X = O or N). The chelating ligands create wide of metallocyclic rings and the effects of both steric and electronic factors influence on the values of L-Pt-L bite angles. The some cooperative effects were found and are discussed with trans-influence of the respective donor atoms. Keywords: Structure, organodiphosphine, PtP2X2 (X = OL, NL, CN, BL), review ...

Synthesis, Characterization and Antimicrobial Properties of Pd(II), Cr(III), Ni(II) and Co(II) Metal Complexes of Aniline and Sulphadiazine Schiff Bases as mixed Ligands

Research Article of American Journal of Chemical Research Synthesis, Characterization and Antimicrobial Properties of Pd(II), Cr(III), Ni(II) and Co(II) Metal Complexes of Aniline and Sulphadiazine Schiff Bases as mixed Ligands 1Ejelonu Benjamin Chibuzo, 1*Oyeneyin Oluwatoba Emmanuel, 3Akele Olatunbosun Emmanuel, 2Olagboye Sulaiman Adeoye 1Department of Chemical Sciences, Adekunle Ajasin University, Akungba-Akoko, Ondo State, Nigeria; 2Chemistry Department, Ekiti State University, Ado-Ekiti, Ekiti State, Nigeria; 3Department of Microbiology, Adekunle Ajasin University, Akungba-Akoko, Ondo State, Nigeria Novel Pd(II), Cr(III), Ni(II) and Co(II) metal complexes of Schiff bases were synthesized from the condensation reaction between salicylaldehyde and aniline (L1) and sulphadiazine (L2). They were characterized using FTIR and UV-Visible spectroscopy and subjected to conductivity, melting point and solubility measurements. The complexes are non-toxic, non-electrolytic and stable solids. The involvement of the azomethine nitrogen in coordination with the metals was confirmed by the IR and UV results. They showed good inhibitory activities against various microorganisms. Keywords: Aniline Schiff bases, Sulphadiazine Schiff bases, Transition metal complexes, Antimicrobial properties, Synthesis, Spectral studies ...

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American journal of chemical research

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