Bis(2-mercaptopyridine-N-oxide)oxovanadium(IV): Synthesis, structure and its conversion to the dichloro complex

Tsagkalidis, Wenerios; Rodewald, Dieter; Rehder, Dieter; Vergopoulos, Vassilios

doi:10.1016/0020-1693(94)03815-5

Cited by 25 publications

(11 citation statements)

References 25 publications

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“…Bands corresponding to metal-to-ligand stretching modes were also identified in the low frequency region. These values generally agree with those previously reported by Tsagkalidis et al [12]. Nevertheless, in contrast to the data of these authors, we found that the ν(N-O) band of the ligand is shifted to lower frequencies after complex formation.…”

Section: Infrared Spectrasupporting

confidence: 91%

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Electrochemical and Spectroscopic Behaviour of Bis(2-mercaptopyridine-N-oxide)oxovanadium(IV)

Parajón‐Costa

González‐Baró

Baran

2002

Z. anorg. allg. Chem.

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The complex [VO(MPO) 2 ] (MPO ϭ deprotonated 2-mercaptopyridine N-oxide) was synthesized and characterized by IR spectroscopy. Its electrochemical behaviour was investigated by cyclic voltammetry in different organic solvents. The V IV /V V and V IV / V III couples could be identified. The nature of the electroactive species is strongly dependent on the solvent. The results are discussed in terms of a reaction mechanism describing the character- Elektrochemisches und spektroskopisches Verhalten von Bis(2-mercaptopyridin-N-oxid)oxovanadium(IV)Inhaltsübersicht. Der Komplex [VO(MPO) 2 ] (MPO ϭ deprotoniertes 2-mercapto-pyridin N-oxid) wurde dargestellt und IR-spektroskopisch charakterisiert. Sein elektrochemisches Verhalten wurde durch cyclische Voltammetrie in verschiedenen organischen Lö-sungsmitteln untersucht. Die Redoxpaare V IV /V V und V IV /V III wurden identifiziert. Die Natur der elektroaktiven Spezies erwies eine starke Abhängigkeit von den Lösungsmitteln. Die Ergebnisse

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Section: Infrared Spectrasupporting

confidence: 91%

“…Its crystal structure has been already determined [12] and a coordination scheme of the squared-base-pyramidal [VO(MPO) 2 ] complex is depicted in Fig.1b.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and Spectroscopic Behaviour of Bis(2-mercaptopyridine-N-oxide)oxovanadium(IV)

Parajón‐Costa

González‐Baró

Baran

2002

Z. anorg. allg. Chem.

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“…The assignment of the typical bands due to m(N-O), d(N-O) and m(C-S) is in agreement to those performed for the free ligand and other metal complexes [19,[38][39][40]. These bands shift after coordination to the metal in agreement with the bidentate coordination of the ligand through the oxygen of the N-O group and the sulfur.…”

Section: Ir Studiessupporting

confidence: 84%

Synthesis and characterization of a pyridine-2-thiol N-oxide gold(I) complex with potent antiproliferative effect against Trypanosoma cruzi and Leishmania sp. insight into its mechanism of action

Vieites

Smircich

Guggeri

et al. 2009

Journal of Inorganic Biochemistry

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“…1). This cis con®guration has been seen in the other four oxovanadium(IV) complexes with an O 2 S 2 donor set which have been structurally characterized (Higes-Rolando et al, 1994;Tsagkalidis et al, 1994;Preuss et al, 1990;Klich et al, 1996;Wen et al, 1998). The V(O 2 S 2 ) core thus displays pseudo-C s symmetry with the ' plane passing through the VÐO3 bond and bisecting the O1ÐO2 and S1ÐS2 vectors.…”

Section: Commentmentioning

confidence: 66%

One-dimensional chains in sodium tetraphenylphosphonium bis(2-mercapto-4-methylphenolato-O,S)oxovanadate(IV)

Challen¹,

McConville²,

Youngs³

2000

Acta Crystallogr C

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The title compound, Na(C 24 H 20 P)[V(C 7 H 6 OS) 2 O], contains oxovanadium(IV) in a square-pyramidal coordination geometry with a basal plane consisting of a cis-S 2 O 2 donor group. The [VO(mmp) 2 ] 2À (mmpH 2 = 2-mercapto-4-methylphenol) units are linked into in®nite chains by the sodium ions. CommentThe controlled linking of discrete molecular building blocks into supramolecular aggregates can be achieved through utilizing a number of different kinds of inter-subunit interactions. For oxovanadium(IV) compounds, solid-state and solution structures have been stabilized by speci®c interactions including (i) V OÐV O linkages (Zheng et al., 1995;Aiello et al., 1997;Sa Â ez-Puche et al., 1998), (ii) hydrogen bonds (Wen et al., 1998), (iii) bridging ligands (Salta et al., 1996) and (iv) alkali or alkaline earth ions functioning in a bridging mode (Garcia-Jaca et al., 1993). We have reported (Klich et al., 1996) the vanadyl(IV) complex Na(Ph 4 P)[VO(mp) 2 ]ÁEt 2 O containing the mixed O,S-donor ligand mp 2À [mpH 2 = 2mercaptophenol, C 6 H 4 (OH)(SH)]. In this solid, a pair of [VO(mp) 2 ] 2À anions are linked together through a pair of sodium ions into a centrosymmetric dimer. Each sodium ion is bonded to two ligand O atoms from one [VO(mp) 2 ] 2À unit and to one ligand O atom plus the vanadyl O atom from the other. In the course of these studies, we also prepared the related compound Na(Ph 4 P)[VO(mmp) 2 ] (mmpH 2 = 2-mercapto-4methylphenol), (I), which crystallized in a structure with anionic [NaVO(mmp) 2 À ] I chains. We report herein upon this structure.The square-pyramidal anion, [VO(mmp) 2 ] 2À , contains an apical O atom with a V O bond length of 1.619 (2) A Ê , and an O 2 S 2 basal plane with the two ®ve-membered VÐOÐCÐCÐ S chelate rings in a cis con®guration (Fig. 1). This cis con®guration has been seen in the other four oxovanadium(IV) complexes with an O 2 S 2 donor set which have been structurally characterized (Higes-Rolando et al., 1994;Tsagkalidis et al., 1994;Preuss et al., 1990; Klich et al., 1996;Wen et al., 1998). The V(O 2 S 2 ) core thus displays pseudo-C s symmetry with the ' plane passing through the VÐO3 bond and bisecting the O1ÐO2 and S1ÐS2 vectors. The V atom is displaced 0.598 (1) A Ê from the O 2 S 2 least-squares plane, giving a slightlȳ atter pyramid than in [VO(mp) 2 ] 2À , where the corresponding displacement is 0.638 A Ê . The VÐS and VÐO basal plane bond lengths average to 2.375 and 1.963 A Ê , respectively, and are very similar to those in [VO(mp) 2 ] 2À (2.365 and 1.959 A Ê , respectively) and the other three VO(OS) 2 complexes. The two ®ve-membered chelate rings are folded about the OÐS vector, with the aromatic rings bending toward the apical O atom and making angles of 24.54 (9) and 12.60 (8) with the O1ÐVÐS1 and O2ÐVÐS2 planes, respectively. While this bending is also observed in the related complexes [VO(mp) 2 ] 2À (Klich et al., 1996) and VO(Hmpp) 2 (Wen et al., 1998), it is more pronounced in the title compound. Figure 1The structure of the [VO(mmp) 2 ] 2À dianion. Displ...

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Bis(2-mercaptopyridine-N-oxide)oxovanadium(IV): Synthesis, structure and its conversion to the dichloro complex

Cited by 25 publications

References 25 publications

Electrochemical and Spectroscopic Behaviour of Bis(2-mercaptopyridine-N-oxide)oxovanadium(IV)

Electrochemical and Spectroscopic Behaviour of Bis(2-mercaptopyridine-N-oxide)oxovanadium(IV)

Synthesis and characterization of a pyridine-2-thiol N-oxide gold(I) complex with potent antiproliferative effect against Trypanosoma cruzi and Leishmania sp. insight into its mechanism of action

One-dimensional chains in sodium tetraphenylphosphonium bis(2-mercapto-4-methylphenolato-O,S)oxovanadate(IV)

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