Structures and spectral properties of palladium(II) complexes of 2-acetylpyridine N(4)-dimethylthiosemicarbazone

Synthesis, Structural Characteristics and Biological Activities of Complexes of ZnII, CdII, HgII, PdII, and PtII with 2-Acetylpyridine 4-Methylthiosemicarbazone

“…[16] In 7 · 2 DMSO the HgϪS, HgϪN(pyridine), and HgϪCl distances are all similar to doubtless due to the greater basicity of this nitrogen atom and, possibly, the trans effect. The MϪS and MϪCl dis-those found in other complexes of mercury(II) halides with ligands coordinating through carbonyl sulfur and pyridine tances are similar to those found in other complexes in which Pd and Pt coordinate to S [13] [28] or Cl. [29] The de-nitrogen atoms, [26] [27] but the HgϪN(azomethine) bond, longer than HgϪS, is very weak.…”

Synthesis, Structural Characteristics and Biological Activities of Complexes of ZnII, CdII, HgII, PdII, and PtII with 2-Acetylpyridine 4-Methylthiosemicarbazone

“…[16] In 7 · 2 DMSO the HgϪS, HgϪN(pyridine), and HgϪCl distances are all similar to doubtless due to the greater basicity of this nitrogen atom and, possibly, the trans effect. The MϪS and MϪCl dis-those found in other complexes of mercury(II) halides with ligands coordinating through carbonyl sulfur and pyridine tances are similar to those found in other complexes in which Pd and Pt coordinate to S [13] [28] or Cl. [29] The de-nitrogen atoms, [26] [27] but the HgϪN(azomethine) bond, longer than HgϪS, is very weak.…”

Synthesis, Magnetic, Spectral and Biological Studies of Copper(II) Complexes of 4-Benzoyl-3-Methyl-1-Phenyl-2-Pyrazolin-5-One N(4)-Substituted Thiosemicarbazones

“…1060 cm -1 , assignable to ν 3 (BF 4 ), and a relatively sharp band at ca. 510 cm -1 due to ν 4 (BF 4 ) indicate non-coordination [26] of the tetrafluoroborate ions in all compounds, in agreement with the molar conductivity results (Table 1).…”

An Electrochemical Study of Antineoplastic Gallium, Iron and Ruthenium Complexes with Redox Noninnocent α-N-Heterocyclic Chalcogensemicarbazones

“…64 There is only one publication dealing with the metal ion influence on the redox potentials of a thiosemicarbazone ligand. 65 Although the reference electrode was not specified, making a quantitative comparison impossible, the reported redox potentials of the perchlorate salt of the iron(III) complex 2B and the ligand HL B appeared at considerably different values for all reduction waves than observed in the present study. To the best of our knowledge, (L B ) -/2--1.69 -1.00 -2.00 1.12 [Fe(L B )2] 0/--1.56 -1.61 0.02 -0.01 0.02 -0.51 -2.45 (HL B ) 0/--1.12 -1.21 0.08 -0.08 0.07 -1.07 -3.03 [Ga(L B )2] +/0 -0.86 -0.93 0.32 0.34 0.32 -0.16 -5.85 a H, Ga, and Fe, respectively.…”

“…The direct reduction of the azomethine bond was already reported for the same ligand in water 20 years ago . There is only one publication dealing with the metal ion influence on the redox potentials of a thiosemicarbazone ligand . Although the reference electrode was not specified, making a quantitative comparison impossible, the reported redox potentials of the perchlorate salt of the iron(III) complex 2B and the ligand HL B appeared at considerably different values for all reduction waves than observed in the present study.…”

Synthesis, Structural Characteristics and Biological Activities of Complexes of ZnII, CdII, HgII, PdII, and PtII with 2-Acetylpyridine 4-Methylthiosemicarbazone

“…[16] In 7 · 2 DMSO the HgϪS, HgϪN(pyridine), and HgϪCl distances are all similar to doubtless due to the greater basicity of this nitrogen atom and, possibly, the trans effect. The MϪS and MϪCl dis-those found in other complexes of mercury(II) halides with ligands coordinating through carbonyl sulfur and pyridine tances are similar to those found in other complexes in which Pd and Pt coordinate to S [13] [28] or Cl. [29] The de-nitrogen atoms, [26] [27] but the HgϪN(azomethine) bond, longer than HgϪS, is very weak.…”

Synthesis, Magnetic, Spectral and Biological Studies of Copper(II) Complexes of 4-Benzoyl-3-Methyl-1-Phenyl-2-Pyrazolin-5-One N(4)-Substituted Thiosemicarbazones

“…1060 cm -1 , assignable to ν 3 (BF 4 ), and a relatively sharp band at ca. 510 cm -1 due to ν 4 (BF 4 ) indicate non-coordination [26] of the tetrafluoroborate ions in all compounds, in agreement with the molar conductivity results (Table 1).…”

An Electrochemical Study of Antineoplastic Gallium, Iron and Ruthenium Complexes with Redox Noninnocent α-N-Heterocyclic Chalcogensemicarbazones

“…64 There is only one publication dealing with the metal ion influence on the redox potentials of a thiosemicarbazone ligand. 65 Although the reference electrode was not specified, making a quantitative comparison impossible, the reported redox potentials of the perchlorate salt of the iron(III) complex 2B and the ligand HL B appeared at considerably different values for all reduction waves than observed in the present study. To the best of our knowledge, (L B ) -/2--1.69 -1.00 -2.00 1.12 [Fe(L B )2] 0/--1.56 -1.61 0.02 -0.01 0.02 -0.51 -2.45 (HL B ) 0/--1.12 -1.21 0.08 -0.08 0.07 -1.07 -3.03 [Ga(L B )2] +/0 -0.86 -0.93 0.32 0.34 0.32 -0.16 -5.85 a H, Ga, and Fe, respectively.…”

“…The direct reduction of the azomethine bond was already reported for the same ligand in water 20 years ago . There is only one publication dealing with the metal ion influence on the redox potentials of a thiosemicarbazone ligand . Although the reference electrode was not specified, making a quantitative comparison impossible, the reported redox potentials of the perchlorate salt of the iron(III) complex 2B and the ligand HL B appeared at considerably different values for all reduction waves than observed in the present study.…”

Synthesis, Structural Characteristics and Biological Activities of Complexes of ZnII, CdII, HgII, PdII, and PtII with 2-Acetylpyridine 4-Methylthiosemicarbazone

“…[16] In 7 · 2 DMSO the HgϪS, HgϪN(pyridine), and HgϪCl distances are all similar to doubtless due to the greater basicity of this nitrogen atom and, possibly, the trans effect. The MϪS and MϪCl dis-those found in other complexes of mercury(II) halides with ligands coordinating through carbonyl sulfur and pyridine tances are similar to those found in other complexes in which Pd and Pt coordinate to S [13] [28] or Cl. [29] The de-nitrogen atoms, [26] [27] but the HgϪN(azomethine) bond, longer than HgϪS, is very weak.…”

Synthesis, Magnetic, Spectral and Biological Studies of Copper(II) Complexes of 4-Benzoyl-3-Methyl-1-Phenyl-2-Pyrazolin-5-One N(4)-Substituted Thiosemicarbazones

“…1060 cm -1 , assignable to ν 3 (BF 4 ), and a relatively sharp band at ca. 510 cm -1 due to ν 4 (BF 4 ) indicate non-coordination [26] of the tetrafluoroborate ions in all compounds, in agreement with the molar conductivity results (Table 1).…”

An Electrochemical Study of Antineoplastic Gallium, Iron and Ruthenium Complexes with Redox Noninnocent α-N-Heterocyclic Chalcogensemicarbazones

“…64 There is only one publication dealing with the metal ion influence on the redox potentials of a thiosemicarbazone ligand. 65 Although the reference electrode was not specified, making a quantitative comparison impossible, the reported redox potentials of the perchlorate salt of the iron(III) complex 2B and the ligand HL B appeared at considerably different values for all reduction waves than observed in the present study. To the best of our knowledge, (L B ) -/2--1.69 -1.00 -2.00 1.12 [Fe(L B )2] 0/--1.56 -1.61 0.02 -0.01 0.02 -0.51 -2.45 (HL B ) 0/--1.12 -1.21 0.08 -0.08 0.07 -1.07 -3.03 [Ga(L B )2] +/0 -0.86 -0.93 0.32 0.34 0.32 -0.16 -5.85 a H, Ga, and Fe, respectively.…”

“…The direct reduction of the azomethine bond was already reported for the same ligand in water 20 years ago . There is only one publication dealing with the metal ion influence on the redox potentials of a thiosemicarbazone ligand . Although the reference electrode was not specified, making a quantitative comparison impossible, the reported redox potentials of the perchlorate salt of the iron(III) complex 2B and the ligand HL B appeared at considerably different values for all reduction waves than observed in the present study.…”