Crystal and molecular structure of chloro-bis(1,2-cyclohexanedione-dioxime)triphenylphosphinecobalt(III)

Simonov, Yu. A.; Боурош, П. Н.; Bologa, O. A.; Mazus, M. D.; Gérbéléu, N. V.

doi:10.1007/bf02700781

Cited by 4 publications

(7 citation statements)

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“…The Co-N distances (1.899(3) and 1.903(3) Å) in I are characteristic of the Co(III) complexes with α -dioximes. The bond lengths and bond angles in the DHligands agree with the published data [3][4][5][6]8]. Two DHresidues form fivemembered chelate rings; their mutual arrangement is fixed by intramolecular H bonds é-ç···é (é···é 2.507(4), é-ç 0.82, é···H 1.71 Å, angle OHO 162°) (Fig.…”

Section: Synthesis and Structure Of Cobalt(iii) A -Dimethylglyoximatesupporting

confidence: 87%

“…In the recent years, we studied the chemistry and stereochemistry of cobalt(III) dioximates with the general formula [ Co ( DioxH ) 2 (Ä) 2 ] n ï , where n = 1 and 2, DioxHis the residue of dimethylglyoxime or its analogs, A is a neutral ligand, and ïis a fluorine-containing complex anion [1][2][3][4][5]. Special attention was given to problems of intermolecular interactions between components in the crystal of the ionic type.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Structure of Cobalt(III) α-Dimethylglyoximate [Co(DH)2(Py)2][H2F3]

et al. 2005

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The [ Co(DH) 2 (Py) 2 ][H 2 F 3 ] complex ( DHis the dimethylglyoxime residue) is synthesized and studied by X-ray diffraction analysis. Structural units of the crystal are complex cations [Co(DH) 2 (Py) 2 ] + and anions [H 2 F 3 ] -. Two residues of α -dimethylglyoxime linked by intramolecular hydrogen bonds é-ç ··· é lie in the equatorial plane of the octahedral Co(III) complex, and two pyridine molecules occupy the apical positions.

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Section: Synthesis and Structure Of Cobalt(iii) A -Dimethylglyoximatesupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Synthesis and Structure of Cobalt(III) α-Dimethylglyoximate [Co(DH)2(Py)2][H2F3]

et al. 2005

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“…3), respectively. The metal ions have a trans octahedral environment like that found in transition metal complexes of the general formula [MХ(DioxH) 2 A], where X is the halide ion and A is Py, Pz (pyrazine), PPh 3 , and Inia (isonicotinamide) [29][30][31][32][33]. The coordination polyhe dra of the Co 3+ ions in structures I-III are made up of four N atoms of two bidenate monodeprotonated ligands DioxH -, one N atom of the pyrazine ring of Pzca, and the halide ion (Br -or Cl -).…”

Section: Resultsmentioning

confidence: 99%

“…The coordination polyhe dra of the Co 3+ ions in structures I-III are made up of four N atoms of two bidenate monodeprotonated ligands DioxH -, one N atom of the pyrazine ring of Pzca, and the halide ion (Br -or Cl -). The equatorial plane of the resulting octahedron СоN 5 X contains two residues DioxH -, which are coordinated in a chelating bidentate fashion and united through hydrogen bonds О-Н⋅⋅⋅О (Table 3) C (31) found in the binuclear complex [(Co(DfgH) 2 (СН 2 -С 6 Н 5 )) 2 Pz] (2.091 or 2.048, 2.058, 2.063, and 2.047 Å) [34]. Four coordinated N atoms of two ligands DioxH -are virtually coplanar in structures II and III (±0.008 and ±0.013 Å, respectively) containing both identical and different dioximes; nor does the Co(1) atom deviate from this plane.…”

Section: Resultsmentioning

confidence: 99%

Asymmetric and symmetric cobalt(III) dioximates with pyrazinecarboxamide: Synthesis and crystal structure

et al. 2012

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461Pyrazinecarboxamide (Pzca) has four electron donating centers and thus can act, depending on the conditions of the synthesis and the complexing metal, as a ligand with different dentate numbers to form mono , di , and polynuclear complexes. Analysis of the Cambridge Crystallographic Data has showed that Pzca in many copper, manganese, vanadyl, mercury, and silver complexes [1-8] is coordinated to the cen tral metal atom through only one N atom of the het erocycle, although its structure contains several elec tron donating centers. However, in terbium, neody mium, and cobalt complexes, as well as in some copper complexes, this organic molecule acts as a bidentate ligand coordinated to the metal atom through the N atom of the heterocycle and the car bamoyl O atom to give mononuclear complexes [9][10][11][12][13][14][15][16]. Pyrazinecarboxamide derivatives additionally functionalized with СONH 2 or СОО -always act as bidentate ligands coordinated either through the same pair of N, O atoms (as, e.g., in copper and nickel com plexes [17][18][19]) or through the electron donating atom of the substituent [20]. Mononuclear complexes of transition metals with Pzca can have the metal : Pzca ratios of 1 : 1 [1, 6, 17, 19] and 1 : 2 [2, 3, 5, 7, 11-16], regardless of the mono or bidentate coordi nation of Pzca. In Nd and Tb complexes, three such ligands are coordinated in a bidentate fashion to one metal atom, through more than two electron donating centers. Pyrazinecarboxamide acts as a bridging ligand in copper and silver complexes using a set of N,N,O atoms to form a polynuclear structure. One Pzca ligand can be coordinated to two metal atoms [21][22][23] (being bidentate with respect to one and monodentate with respect to the other) or to three metal atoms in a monodentate fashion as in a silver complex [24].When analyzing the Cambridge Crystallographic Data, we have found several crystallographic studies of metal complexes combining Pzca and other organic ligands [4,8,16,22]. However, data on complexes of transition metal dioximates with Pzca are lacking. To reveal the way in which Pzca is coordinated to the cen tral metal ion, the specific features of the coordination polyhedron of Co(III), and the relative positions and crystal packing of the complexes, we obtained four dif ferent complexes all combining dioxime (DioxH) resi due and Pzca. Three of the complexes were identified by X ray diffraction:[CoCl(NioxH) 2 (Pzca)] (II), and [CoCl(DmgH)(NioxH)(Pzca)] ⋅ 0.5C 2 H 5 OH ⋅ 0.5Н 2 О (III), where DmgH, DfgH, and NioxH are the monoanions of dimethylglyoxime, diphenylglyoxime, and cyclohexane 1,2 dione dioxime, respectively. Complexes I and II contain only one type of the dioxime (DfgH or NioxH), while asymmetric com plex III contains the residues of different dioximes (DmgH and NioxH). We also obtained a symmetric Co(III) complex with DmgH and Pzca, viz., [CoCl(DmgH) 2 (Pzса)] (IV). Complexes I-IV were examined by elemental analysis and IR spectroscopy. Abstract-A number of novel complexes of cobalt(III) trans dioxim...

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“…[4][5][6][7][8][9][10][11]; they can be used as potential MRI contrast agents [12] and fluorescent sensors [13,14]. Semicarbazide is able to coordinate metal ions [15][16][17][18][19][20][21][22][23][24] and the biological activities of these complexes are associated with the formation of chelates with various metal ions, bonding through N or O donors. Semicarbazides and their metal complexes attract considerable attention because they have applications in medicine as lathyrogenic and teratogenic agents [25].…”

Section: Introductionmentioning

confidence: 99%

Cobalt(II), nickel(II), and copper(II) complexes of 14-membered hexaazamacrocycles: synthesis and characterization

Volov

Zamilatskov

Чернышев

et al. 2014

Journal of Coordination Chemistry

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Cobalt(II), nickel(II), and copper(II) complexes containing 5,12-di(4-bromophenyl)-7, 14-dimethyl-1,2,4,8,9,11-hexaazacyclotetradeca-7,14-diene-3,10-dione (H 2 L 1 ) and 5,12-diphenyl-7,14-dimethyl-1,2,4,8,9,11-hexaazacyclotetradeca-7,14-diene-3,10-dione (H 2 L 2 ) have been synthesized. All complexes were characterized by elemental analysis, MALDI TOF-MS spectrometry, and electronic absorption spectroscopy. The crystal structures of two compounds, [Cu 2 (H 2 L 1 )Cl 4 ] n and [NiL 2 ], were determined by X-ray powder diffraction. In the polymeric [Cu 2 (H 2 L 1 )Cl 4 ] n , the Cu 2 Cl 4 units and H 2 L 1 molecules are situated on inversion centers. Each Cu(II) has a distorted trigonal-bipyramidal coordination environment formed by N and O from H 2 L 1 [Cu-N 2.340(14) Å, Cu-O 1.952(11) Å], two bridging chlorides [Cu-Cl 2.332(5), 2.279(5) Å] and one terminal chloride [Cu-Cl 2.320(6) Å]. In the [NiL 2 ] complex, the Ni(II) situated on inversion center has a distorted square-planar coordination environment formed by four nitrogens from L 2 [Ni-N 1.860(11), 1.900(11) Å].

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Crystal and molecular structure of chloro-bis(1,2-cyclohexanedione-dioxime)triphenylphosphinecobalt(III)

Cited by 4 publications

References 4 publications

Synthesis and Structure of Cobalt(III) α-Dimethylglyoximate [Co(DH)2(Py)2][H2F3]

Synthesis and Structure of Cobalt(III) α-Dimethylglyoximate [Co(DH)2(Py)2][H2F3]

Asymmetric and symmetric cobalt(III) dioximates with pyrazinecarboxamide: Synthesis and crystal structure

Cobalt(II), nickel(II), and copper(II) complexes of 14-membered hexaazamacrocycles: synthesis and characterization

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