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  • 1
    Electronic Resource
    Electronic Resource
    Aquabis(3-methyl-4-octanoyl-1-phenyl-5-pyrazolonato-O,O')zinc(II) and Bis(ethanol-O)bis(3-methyl-1-phenyl-4-stearoyl-5-pyrazolonato-O,O')cadmium(II) (1998)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 54 (1998), S. 776-779 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270197019215
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  • 2
    Electronic Resource
    Electronic Resource
    Ligand Exchange Reactions of ReOCl3(PPh3)2 with Tridentate Diacidic Ligands with the Donor Set O⌢N⌢O(N): Molecular and Electronic Structures of the Resulting Oxo-rhenium(V) Complexes (1999)
    Springer
    Structural chemistry 10 (1999), S. 105-119 
    Details
    ISSN: 1572-9001
    Keywords: Crystal structures ; rhenium complexes ; tridentate ONO and ONN ligand complexes ; oxo complexes ; molecular mechanics ; quantum chemical calculations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A series of oxo-rhenium complexes of the type ReO(LLL)(LLLH) with tridentate diacidic ligands (LLLH2) containing the donor set $$O\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\frown}$}}{ } N\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\frown}$}}{ } O\left( N \right)$$ has been synthesized and characterized. X-ray analyses were carried out for benzoylacetone-2-hydroxyanilato(2-)-benzoylacetone-2-hydroxyanilato-oxo-rhenium(V) ReO(BAHA)2 1, [2,6-diphenylacylpyridinato(2-)]-2,6-diphenylacylpyridinato-oxo-rhenium(V) ReO(DPAP)2 2, [2-pyrrolaldehyde-2′-hydroxyanilato-(2-)]-2-pyrrolaldehyde-2′-hydroxyanilato-oxo-rhenium(V) ReO(PAHA)2 3, {4-[1-(N′-benzoylhydrazino)-1-phenyl-methyliden]-3-methyl-1-phenyl-pyrazol-5-onato-(2-)} – {4-[1-(N′-benzoylhydrazino)-1-phenyl-methyliden]-3-methyl-1-phenyl-pyrazol-5-onato}-oxo-rhenium(V) ReO(BHMP)2 5, and for the ligand 4-[1-(N′-benzoylhydrazino)-1-phenyl-methyliden]-3-methyl-1-phenyl-pyrazol-5-one (BHMP). In all the oxo-rhenium complexes the rhenium is in a distorted octahedral coordination environment with one ligand acting as tridentate in the equatorial plane and the other ligand acting as bidentate in the axial position. The Re — Nbond lengths were found to be in the range of 2.01 to 2.18 Å depending on the nature of the bond caused by mesomeric and steric effects of the ligands. In order to check the bonding relationships, molecular orbital calculations with Gaussian 94 were carried out. Additionally force field calculations were performed using the Extensible Systematic Force Field (ESFF). This was done to examine the ability of the ESFF to represent the bonding relationships in order to provide reasonable input data for MO calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022081213434
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  • 3
    Electronic Resource
    Electronic Resource
    13C-CP/MAS-NMR spectroscopy of tridentate diacidic ligands and their titanium(IV) chelates. molecular structure of bis[benzoylacetone thiobenzoylhydrazonato(2-)]titanium(iv) (1997)
    Springer
    Structural chemistry 8 (1997), S. 211-216 
    Details
    ISSN: 1572-9001
    Keywords: Titanium(IV) chelates ; tridentate diacidic ligands ; donor set ONO(S) ; 13C-CP/MAS-NMR spectra ; crystal structure of bis[benzoylacetone thiobenzoylhydrazonato(2-)]titanium(IV)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A series of tridentate diacidic ligands having the donor set ONO(S) as well as the corresponding titanium(IV) chelates were studied by13C-CP/MAS-NMR spectroscopy. Structural changes caused by the complex formation are discussed. The crystal structure of bis[benzoylacetone thiobenzo-ylhydrazonato(2-)]titanium(IV) was determined by X-ray analysis as to be distorted trigonal prismatic. Orthorhombic space group Pca2l,Z=4, 3304 observed independent reflections, unit-cell parameters at 298 K:a=22,808(2) å,b=13,073(4) å,c=10,450(4) å.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02263509
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  • 4
    Electronic Resource
    Electronic Resource
    Rate of copper extraction and structure of model β-diketones and 4-acyl-5-pyrazolones (1998)
    Springer
    Journal of radioanalytical and nuclear chemistry 228 (1998), S. 71-76 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The rate of copper extraction with individual 4-acyl-5-pyrazolones and the stability of various enolic and keto forms and their monohydrates were studied. The rate of extraction depends mainly upon the structure of substituent at position 4 and falls when the substituent becomes spacy. The effect of the substituent at position 1 is rather low. The enolic form with intramolecular hydrogen bonding is the most stable. It can form hydrates with water molecules without intramolecular hydrogen bond breaking.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02387302
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  • 5
    Electronic Resource
    Electronic Resource
    Oxofreie Vanadium(IV)-Komplexe mit dreizähnigen diaciden Liganden. Struktur von Bis[2,2′-dihydroxy-azobenzenato(2-)]vanadium(IV) (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 23-28 
    Details
    ISSN: 0044-2313
    Keywords: Non-oxo Vanadium(IV) Complexes ; Mass Spectra ; Cyclovoltammetry ; Bis[2,2′-dihydroxy-azobenzenato(2)]vanadium(IV) ; Trigonal-prismatic Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Non-oxo Vanadium(IV) Complexes with Tridentate Diacidic Ligands. Molecular Structure of Bis[2.2′-dihydroxy-azobenzenato(2-)]vanadium(IV)By the reaction of tris(acetylacetonato)vanadium(III) with tridentate diacidic ligands non-oxo vanadium(IV) complexes of these ligands were synthesized. The complexes were characterized by mass spectrometry. Electrochemical studies show that the complexes are reversibly oxidized or reduced. Bis[2,2′-dihydroxy-azobenzenato(2-)]vanadium(IV) has a distorted trigonal-prismatic structure. Crystallographic data see „Inhaltsübersicht“.
    Notes: Durch Reaktion von Tris(acetylacetonato)-vanadium(III) mit dreizähnigen diaciden Liganden wurden oxofreie Vanadium(IV)-Komplexe dieser Liganden dargestellt. Die Komplexe wurden massenspektrometrisch charakterisiert. Sie können elektrochemisch reversibel oxidiert und reduziert werden. Bis[2,2′-dihydroxy-azobenzenato(2-)]vanadium(IV) besitzt eine verzerrt trigonal-prismatische Struktur. Raumgruppe P21/n, Z = 4, 1 812 beobachtete unabhängige Reflexe, R = 5,9%. Gitterabmessungen bei 19°C; a = 9,973(2) pm, b = 15,435(3) pm, c = 13,763(3) pm, β = 104,79(3)°.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210107
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  • 6
    Electronic Resource
    Electronic Resource
    Titan(IV)-Komplexe mit dreizähnigen diaciden Liganden. Kristallstruktur von Bis[2,6-diphenacylpyridinato(2 -)]titan(IV) (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1431-1435 
    Details
    ISSN: 0044-2313
    Keywords: Titanium(IV) Chelates ; Tridentate Diacidic Ligands ; Mass Spectra, Charge Transfer Band, Structure of Bis[2,6-diphenacylpyridinato(2-)]titanium(IV) ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Titanium(IV) Complexes with Tridentate Diacidic Ligands. Crystal Structure of Bis[2,6-diphenacylpyridinato(2-)]titanium(IV)The titanium(IV) chelates with 2,2′-dihydroxy-azobenzene, salicylaldehyde-2-hydroxyanil, 2-(2′-hydroxyphenyl)-8-quinolinol, 2,6-diphenacylpyridine as well as with aroylhydrazones of salicylaldehyde, benzoylacetone and thenoyltrifluoroacetone were synthesized by ligand exchange reactions of titanium(IV)-isopropoxide. The compounds are red or black in colour and were identified by distinct molecular peaks in the mass spectra. The crystal and molecular structure was determined for bis[2,6-diphenacylpyridinato(2-)] titanium(IV). Crystallographic data see “Inhaltsübersicht”.
    Notes: Durch Ligandenaustauschreaktion von Titan(IV)-isopropoxid mit 2,2′-Dihydroxyazobenzen, Salicylaldehyd-2-hydroxyanil, 2-(2′-Hydroxyphenyl)-chinolin-8-ol, 2,6-Diphenacylpyridin sowie Aroylhydrazonen-von Salicylaldehyd, Benzoylaceton und Thenoyltrifluoraceton wurden die Titan(IV)-Chelate dieser Liganden dargestellt. Die roten bis schwarzen Verbindungen zeigen im Massenspektrum das erwartete Molekülion. Für Bis[2,6-diphenacylpyridinato(2-)]-titan(IV) wurde die Kristall- und Molekülstruktur bestimmt: Gitterabmessungen bei 293 K, a = 1 448,6(7) pm, b = 776,1(5) pm, c = 1 520,7(5) pm, β = 104,65(3)°, Raumgruppe Pc, Z = 2, 3 755 unabhängige Reflexe, R = 5,5%.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210825
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  • 7
    Electronic Resource
    Electronic Resource
    Struktur und ausgewählte Reaktionen von ReCl4(PPh3)2 (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1797-1799 
    Details
    ISSN: 0044-2313
    Keywords: Tetrachloro-bis(triphenylphosphane)rhenium(IV) ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: ReCl4(PPh3)2 - Reactions and StructureThe compounds ReCl4(PPh3)2 and Re2OCl3(C2H5COO)2(PPh3)2 resulting from the reaction of ReOCl3(PPh3)2 with PPh3 in boiling propionic acid and HCl atmosphere were characterized by their VIS-spectra and structural data.Ligand exchange reactions with acetylacetone gave ReCl2(acac)2 as well as ReCl2(acac)(PPh3)2.Crystallographic data see “Inhaltsübersicht”.
    Notes: Die bei der Umsetzung von ReOCl3(PPh3)2 mit PPh3 in siedender Propionsäure unter HCl nebeneinander entstehenden Verbindungen ReCl4(PPh3)2 und Re2OCl3(C2H5COO)2(PPh3)2 wurden spektroskopisch und röntgenographisch charakterisiert. Bei Ligandenaustauschreaktionen mit Acetylaceton wurden sowohl ReCl2(acac)2 als auch ReCl2(acac)(PPh3)2 identifiziert.ReCl4(PPh3)2: Raumgruppe P21/n; Z = 2; 2 908 beobachtete unabhängige Reflexe; R = 0,0322; Gitterabmessungen bei 210 K: a = 9,324(4) Å; b = 20,93(1) Å; c = 9,636(4) Å; β = 117,66(1)°.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956211031
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  • 8
    Electronic Resource
    Electronic Resource
    Struktur von Bis[salicylaldehyd-2-hydroxyanilato(2 - )]vanadium(IV) (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1973-1976 
    Details
    ISSN: 0044-2313
    Keywords: Non-oxo Vanadium(IV) Complex ; Bis[salicylaldehyde-2-hydroxyanilato(2 - )]vanadium(IV) ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Molecular Structure of Bis[salicylaldehyde-2-hydroxyanilato(2 - )]vanadium(IV)By the reaction of tris(acetylacetonato)vanadium(III) with salicylaldehyde-2-hydroxyanil the non-oxo vanadium(IV) complex of this ligand was prepared. Bis[salicylaldehyde-2-hydroxyanilato(2 - )]vanadium(IV) has a distorted octahedral structure. Crystallographic data see “Inhaltsübersicht”.
    Notes: Durch Reaktion von Tris(acetylacetonato)vanadium(III) mit Salicylaldehyd-2-hydroxyanil wurde der oxofreie Vanadium(IV)-Komplex dieses Liganden dargestellt und durch Röntgenkristallstrukturanalyse die Struktur bestimmt. Bis[salicylaldehyd-2-hydroxyanilato(2 - )]vanadium(IV) besitzt eine verzerrt-oktaedrische Struktur. Raumgruppe P1, Z = 4, 2722 beobachtete, symmetrieunabhängige Reflexe, R = 7,1%. Gitterabmessungen bei 293 K: a = 964,6(1) pm, b = 1285,4(1) pm, c = 1788,9(2) pm, α = 81,42(1)°, β = 74,39(1)°, γ = 89,33(1)°.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956211124
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  • 9
    Electronic Resource
    Electronic Resource
    Reaktionen und thermisches Verhalten oxofreier Vanadium(IV)-Komplexe. Kristallstrukturen von Methoxo-oxo[thenoyltrifluoraceton-salicylhydrazonato(2-)]vanadium(V) und Methoxo-oxo[benzoylaceton-salicylhydrazonato(2-)]vanadium(V) (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 488-494 
    Details
    ISSN: 0044-2313
    Keywords: Vanadium(IV) complexes ; syntheses ; crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions and Thermal Behaviour of Nonoxo Vanadium(IV) Complexes. Crystal Structures of Methoxo-oxo[thenoyltrifluoroacetone-salicylhydrazonato(2-)]vanadium(V) and Methoxo-oxo[benzoylacetone-salicylhydrazonato(2-)]vanadium(V)The persistence of non-oxo vanadium(IV) complexes in dichlormethane/methanol/water solutions was studied by UV/VIS spectroscopy. The reaction products methoxo-oxo-[thenoyltrifluoroacetone-salicylhydrazonato(2-)]vanadium(V) and methoxo-oxo[benzoylacetone-salicylhydrazonato(2-)]vanadium(V) were isolated and characterized by X-ray analysis. The thermal behaviour of non-oxo vanadium(IV) complexes was checked.
    Notes: Die Beständigkeit oxofreier Vanadium(IV)-Komplexe mit dreizähnigen diaciden Liganden in Dichlormethan/Methanol/Wasser wurde UV/VIS-spektroskopisch untersucht. Als Reaktionsprodukte wurden Methoxo-oxo-[thenoyl-trifluoraceton-salicylhydrazonato(2-)]vanadium(V) sowie Methoxo-oxo-[benzoylaceton-salicylhydrazonato(2-)]vanadium(V) isoliert und röntgenstrukturanalytisch charakterisiert. Das thermische Verhalten der oxofreien Vanadium(IV)-Komplexe wurde analysiert.Methoxo-oxo-[thenoyltrifluoraceton-salicylhydrazonato(2-)]-vanadium(V), Raumgruppe P21/a2, Z = 4, 3 124 beobachtete unabhängige Reflexe, R = 0,0579, Gitterabmessungen bei 25°C; a = 800,0(2) pm, b = 2 027,3(6) pm, c = 1 165,0(3) pm, β = 109,03(2)° Methoxo-oxo-[benzoylaceton-salicylhydrazonato(2-)]vanadium(V) Raumgruppe P21/c, Z = 4, 2 312 beobachtete unabhängige Reflexe, R = 0,031, Gitterabmessungen bei 25°C: a = 1 122,6(1) pm, b = 772,96(9) pm, c = 2 021,2(4) pm, β = 95,32(1)°.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210327
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  • 10
    Electronic Resource
    Electronic Resource
    Mangan(IV)-Komplexe mit dreizähnigen diaciden Liganden. Kristallstruktur von Acetylacetonato-salicylaldehydbenzoylhydrazonato(2-)-methanol-mangan(III)Frau Professor Brigitte Sarry zum 75. Geburtstag gewidmet (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1483-1488 
    Details
    ISSN: 0044-2313
    Keywords: Manganese(IV) Chelates, Salicylaldehyde benzoylhydrazone and salicylhydrazone ; Mass Spectra ; Crystal Structure, Acetylacetonato-salicylaldehydebenzoylhydrazonato(2-)-methanol-manganese(III) ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Manganese(IV) Complexes with Tridentate Diacidic Ligands. Crystal Structure of Acetyl-acetonato-salicylaldehydebenzoylhydrazonato(2-)-methanol-manganese(III)The manganese(IV) chelates of salicylaldehyde benzoylhydrazone and salicylaldehyde salicylhydrazone were synthesized by ligand exchange reactions using bis(acetylacetonato)manganese(II), tris(acetylacetonato)manganese(III) as well as manganese(III) acetate. The brown complexes show the expected molecular ions in the APCI mass spectra. As an intermediate compound acetyacetonato-salicylaldehydebenzoylhydrazonato(2-)-methanol-manganese(III) was isolated and characterized by X-ray structural analysis. Crystallographic data see “Inhaltsübersicht”.
    Notes: Durch Ligandenaustauschreaktion von Bis(acetylacetonato)mangan(II) und Tris(acetylacetonato)mangan(III) bzw. Mangan(III)-acetat mit Salicylaldehydbenzoylhydrazon und -salicylhydrazon wurden die Mangan(IV)-Chelate dieser Liganden dargestellt. Die braunen Verbindungen zeigen im APCI-positiv Massenspektrum die erwarteten Molekülionen. Für das Zwischenprodukt Acetylacetonato-salicylaldehydbenzoylhydrazonato(2-)-methanol-mangan(III) wurde die Kristall- und Molekülstruktur bestimmt: Gitterabmessungen bei 293 K; a = 754,3(2) pm, b = 1 027,3(6) pm, c = 1 357,4(5) pm, α = 79,64(4)°, β = 76,51(3)°, γ = 70,45(4)°, Raumgruppe P1 (Nr. 2), Z = 2, 3297 unabhängige Reflexe, R = 3,84%.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210908
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