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In this work, we have studied the use of the oxidized starch as a water-soluble complexing agent for Fe(III) in alkaline conditions. Fe(III) was completely soluble in alkaline solutions with a 0.65:1 molar ratio of the oxidized starch-to-Fe(III) ion. The oxidized starch could also solubilize precipitated Fe(OH)3 under alkaline conditions. FT-IR measurements of the oxidized starch-Fe(III) complex indicated that there was a direct coordination between anionic ligands (-O− and -COO−) of starch and the Fe(III) ion. Additionally, hydrogen bonding occurred between hydroxyl groups of oxidized starch and Fe(III) which decreased as pH increased. It was also detected that the binding mechanism did change according to the pH of the Fe(III) solution of the oxidized starch addition. [ABSTRACT FROM AUTHOR]

Various aliphatic and aromatic secondary alcohols are efficiently oxidized into corresponding ketones using non-hazardous and inexpensive BrOH, generated in situ from NaBr and NaBrO3 in aqueous acid. [ABSTRACT FROM AUTHOR]

The dichloromethane solvates of the isomers tetrakis(μ-1,3-benzothiazole-2-thiolato)-κ4 N: S;κ4 S: N-dipalladium(II)( Pd— Pd), (I), and tetrakis(μ-1,3-benzothiazole-2-thiolato)-κ6 N: S;κ2 S: N-dipalladium(II)( Pd— Pd), (II), both [Pd2(C7H4NS2)4]·CH2Cl2, have been synthesized in the presence of ( o-isopropylphenyl)diphenylphosphane and ( o-methylphenyl)diphenylphosphane. Both isomers form a lantern-type structure, where isomer (I) displays a regular and symmetric coordination and isomer (II) an asymmetric and distorted structure. In (I), sitting on an centre of inversion, two 1,3-benzothiazole-2-thiolate units are bonded by a Pd—N bond to one Pd atom and by a Pd—S bond to the other Pd atom, and the other two benzothiazolethiolate units are bonded to the same Pd atoms by, respectively, a Pd—S and a Pd—N bond. In (II), three benzothiazolethiolate units are bonded by a Pd—N bond to one Pd atom and by a Pd—S bond to the other Pd atom, and the fourth benzothiazolethiolate unit is bonded to the same Pd atoms by, respectively, a Pd—S bond and a Pd—N bond. [ABSTRACT FROM AUTHOR]

The dichloromethane solvates of the isomers tetrakis(μ-1,3-benzothiazole-2-thiolato)-κ4 N: S;κ4 S: N-dipalladium(II)( Pd— Pd), (I), and tetrakis(μ-1,3-benzothiazole-2-thiolato)-κ6 N: S;κ2 S: N-dipalladium(II)( Pd— Pd), (II), both [Pd2(C7H4NS2)4]·CH2Cl2, have been synthesized in the presence of ( o-isopropylphenyl)diphenylphosphane and ( o-methylphenyl)diphenylphosphane. Both isomers form a lantern-type structure, where isomer (I) displays a regular and symmetric coordination and isomer (II) an asymmetric and distorted structure. In (I), sitting on an centre of inversion, two 1,3-benzothiazole-2-thiolate units are bonded by a Pd—N bond to one Pd atom and by a Pd—S bond to the other Pd atom, and the other two benzothiazolethiolate units are bonded to the same Pd atoms by, respectively, a Pd—S and a Pd—N bond. In (II), three benzothiazolethiolate units are bonded by a Pd—N bond to one Pd atom and by a Pd—S bond to the other Pd atom, and the fourth benzothiazolethiolate unit is bonded to the same Pd atoms by, respectively, a Pd—S bond and a Pd—N bond. [ABSTRACT FROM AUTHOR]