Complexes between nucleic acid bases and bivalent metal ions. 4:1 Cytosinium copper chloride complex.

Electrochemical and Spectroscopic Studies of Interactions of Mn(III) Complexes with Nucleic Bases and Nucleosides

The complexes of Mn(OAc)3 and/or Mn(acac)3 with nucleic bases and nucleosides (adenine, guanine, xanthine, adenosine and guanosine) have been synthesized in nonaqueous solution. Polarographic and spectroscopic (IR and Visible) methods have been used to establish the active site(s) on the imidazole and pyrimidine rings in the nucleic bases and nucleosides for the intera...

Effect of single additive bivalent metal ions on the growth of Streptomyces clavuligerus and clavulanic acid production

Metal ions are the main impurities of water and media ingredients used in fermentation processes. In this research, the effect of Ca+2, Co+2, Cu+2, Fe+2, Mg+2, Mn+2 and Zn+2 as chloride and sulfate salts was studied on the clavulanic acid production and Streptomyces clavuligerus growth. All chloride salts had negative effect on clavulanic acid production and no clavulanic acid was produced in t...

Spectrophotometric Study of Complex Formations between Alprazolam and Some Transition Metal Ions in Non Aqueous Solution

In this study, the complexation reaction between Alprazolam (ALP) and metal ions (Zn2+, Ni2+, Cu2+ and Co2+) was investigated by using spectrophotometry in ethanol solvent. The stoichiometry of M+/ALP complexes was calculated by applying the Job, molar ratio and Continuous Changes methods and the relevant diagrams were plotted for each metal ions in each method. The results show that the obtain...

Metal/Nucleic-Acid Interactions

Metal Complexes as ligands: Trinuclear Alkali Metal Complexes with Nickel(II) and Copper(II) Metal Complexes of Violuric Acid (Isonitrosobarbituric Acid)

In the present study we have synthesized new trinuclear complexes of alkali metal salts with interaction of stable metal chelates of violuric Acid of Ni(II) & Cu(II) having general formula [Ma(H2Va)2.(MbL)2] and [Ma(H2Va)2.(MbX)2] where Ma=Ni (II) or Cu(II) and Mb =Li + , Na & K , H2Va= deprotonated Violuric Acid , L=deprotonated 1-nitroso-2-naphthol or 8-hydroxyquinoline and, X= ClO-4 or SCN ....