Structural and Spectral Studies of Palladium (II) Complexes of Pyridil bis{3-Piperidyl-, bis{Hexamethyleneiminyl-, bis{N(4)-Diethyl- and bis{N(4)-Dipropylthiosemicarbazone}

Castiñeiras, Alfonso; Gil, María José; Bermejo, Elena; West, Douglas X.

doi:10.1515/znb-2000-0910

Cited by 10 publications

(1 citation statement)

References 9 publications

(21 reference statements)

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“…With Pd and Pt we have isolated crystals with pyridine nitrogen coordination when preparing the complexes from their tetrachlorometallate(II) salts [20]. With Pd and Pt we have isolated crystals with pyridine nitrogen coordination when preparing the complexes from their tetrachlorometallate(II) salts [20].…”

Section: Resultsmentioning

confidence: 99%

Structural and Spectral Study of Copper(II) Complexes of Pyridilbis{3-piperidyl-,bis{hexamethyleneiminyl-,bis{N(4)-diethyl-, andbis{N(4)-dipropylthiosemicarbazones}

Bermejo

Castiñeiras

Gil

et al. 2001

Z. anorg. allg. Chem.

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Pyridil bis(N(4)-substituted thiosemicarbazones) have been prepared in which the substituents in place of the NH 2 group in the thiosemicarbazone moieties are piperidinyl (H 2 Plpip), hexamethyleneiminyl (H 2 Plhexim), diethylaminyl (H 2 Pl4DE), and dipropylaminyl (H 2 Pl4DP). IR, electronic, mass, and ESR spectra of their copper(II) complexes are reported. Crystal structure determinations of H 2 Pl4DE and three of the copper(II) complexes of formula [Cu(Plpip)], [Cu(Plhexim)] and [Cu(Pl4DE)] 2´2 [Cu(Pl4DE)], are included. H 2 Pl4DE lacks hydrogen bonding between the thiosemicarbazone moieties, but each moiety is in the Z confi-guration form with hydrogen bonding from the thiosemicarbazone moieties to the pyridyl nitrogen atoms. The crystal used for the structure determination of [Cu(Plhexim)] was isolated from an electrochemical preparation. In all the new compounds the deprotonated ligands are N,N,S,S-tetradentate, coordinating to the copper(II) centre through their azomethine nitrogen atoms and their thiocarbonyl sulfur atoms.

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Section: Resultsmentioning

confidence: 99%

Structural and Spectral Study of Copper(II) Complexes of Pyridilbis{3-piperidyl-,bis{hexamethyleneiminyl-,bis{N(4)-diethyl-, andbis{N(4)-dipropylthiosemicarbazones}

Bermejo

Castiñeiras

Gil

et al. 2001

Z. anorg. allg. Chem.

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Variable Coordination Modes of Benzaldehyde Thiosemicarbazones – Synthesis, Structure, and Electrochemical Properties of Some Ruthenium Complexes

et al. 2008

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Reaction of benzaldehyde thiosemicarbazones [H2LR, where H2 stands for the two protons, the hydrazinic proton, and the phenyl proton at the ortho position, with respect to the imine function and R (R = OCH3, CH3, H, Cl, and NO2) for the para substituent] with [Ru(PPh3)2(CO)2Cl2], carried out in refluxing ethanol, afforded monomeric complexes of type [Ru(PPh3)2(CO)(HLR)(H)]. The crystal structure of the [Ru(PPh3)2(CO)(HLNO2)(H)] complex was determined. The thiosemicarbazone ligand is coordinated to the ruthenium center as a bidentate N,S‐donor ligand forming a four‐membered chelate ring. When the reaction of the thiosemicarbazones with [Ru(PPh3)2(CO)2Cl2] was carried out in refluxing toluene, a family of dimeric complexes of type [Ru2(PPh3)2(CO)2(LR)2] were obtained. The crystal structure of [Ru2(PPh3)2(CO)2(LCl)2] was determined. Each thiosemicarbazone ligand is coordinated to one ruthenium atom, by dissociation of the two protons, as a dianionic tridentate C,N,S‐donor ligand, and at the same time the sulfur atom is also bonded to the second ruthenium center. 1H NMR spectra of the complexes of both types are in excellent agreement with their compositions. All the dimeric and monomeric complexes are diamagnetic (low‐spin d6, S = 0) and show intense absorptions in the visible and ultraviolet regions. Cyclic voltammetry of the [Ru(PPh3)2(CO)(HLR)(H)] and [Ru2(PPh3)2(CO)2(LR)2] complexes show the ruthenium(II)–ruthenium(III) oxidation within 0.48–0.73 V vs. SCE followed by a ruthenium(III)–ruthenium(IV) oxidation within 1.09–1.47 V vs. SCE. Potentials of both the oxidations are found to correlate linearly with the electron‐withdrawing character of the substituent R. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)

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Orthometallated versus coordination compounds for reactions of platinum(II) and palladium(II) with the ligand benzil bis(4-methyl-3-thiosemicarbazone)

López‐Torres

Mendiola

2010

Inorganica Chimica Acta

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Structural and Spectral Studies of Palladium (II) Complexes of Pyridil bis{3-Piperidyl-, bis{Hexamethyleneiminyl-, bis{N(4)-Diethyl- and bis{N(4)-Dipropylthiosemicarbazone}

Cited by 10 publications

References 9 publications

Structural and Spectral Study of Copper(II) Complexes of Pyridilbis{3-piperidyl-,bis{hexamethyleneiminyl-,bis{N(4)-diethyl-, andbis{N(4)-dipropylthiosemicarbazones}

Structural and Spectral Study of Copper(II) Complexes of Pyridilbis{3-piperidyl-,bis{hexamethyleneiminyl-,bis{N(4)-diethyl-, andbis{N(4)-dipropylthiosemicarbazones}

Variable Coordination Modes of Benzaldehyde Thiosemicarbazones – Synthesis, Structure, and Electrochemical Properties of Some Ruthenium Complexes

Orthometallated versus coordination compounds for reactions of platinum(II) and palladium(II) with the ligand benzil bis(4-methyl-3-thiosemicarbazone)

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