ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Structure of potassium theobrominium tetrakis(thiocyanato)palladate(II) monohydrate (1993)
    International Union of Crystallography
    Details
    Publication Date: 1993-03-15
    Print ISSN: 0108-2701
    Electronic ISSN: 1600-5759
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Published by International Union of Crystallography
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Metal ions-purine interactions: Dichloro-gold(III) complexes of some theophylline derivatives (1986)
    Springer
    Monatshefte für Chemie 117 (1986), S. 941-947 
    Details
    ISSN: 1434-4475
    Keywords: Complexes ; Gold(III) ; Theophylline ; Trimethylxanthine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurden Komplexe der generellen Formel AuLCl2 (wobeiL jeweils die deprotonierten Formen von Theophyllin, 1,3,8-Trimethylxanthin, 8-Ethyltheophyllin, 8-Isopropyltheophyllin und 8-Pentyltheophyllin sind) hergestellt und mittels spektroskopischer (IR,1H-NMR) und thermischer Methoden (TG, DSC) charakterisiert. Die experimentellen Daten legen nahe, daß alle Komplexe eine polymere Struktur aufweisen, wobei die entsprechenden Theophyllin-Derivate als Monoanionen wirken, die an die benachbarten Au(III)-Ionen über beide Imidazol-Stickstoffatome gebunden sind. Die Struktur der Monomeren scheint quadratisch-planar zu sein, wobei die Chloratome intrans-Positionen an das Metall-Ion gebunden sind.
    Notes: Abstract Complexes with the general formula AuLCl2, whereL are the deprotonated forms of theophylline, 1,3,8-trimetylxanthine, 8-ethyl-theophylline, 8-isopropyl-theophylline and 8-pentyl-theophylline, have been synthesized and characterized by spectral (IR and1H-NMR) and thermal methods (TG and DSC). Experimental data suggest that all of them present a polymeric structure, in which the corresponding theophylline derivative acts as a monoanion, bonding to contiguous Au(III) ions through both imidazole nitrogen atoms. The structure of the monomer seems be square-planar, with the chlorine atoms linked to metal ion intrans positions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00811263
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Rh(III), Pd(II), Pt(IV) and Au(III) complexes of 2-thiopyrimidine derivatives (1987)
    Springer
    Monatshefte für Chemie 118 (1987), S. 883-891 
    Details
    ISSN: 1434-4475
    Keywords: Complexes ; Thermal analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurden einige neue Thiopyrimidinderivate und deren Komplexe synthetisiert und mittels Elementaranalyse, IR und1H-NMR charakterisiert: 4-Amino-5-nitroso-6-oxo-1,2,3,6-tetrahydro-2-thio-pyrimidin (TANH), dessen 2-Methylthio-Derivat (MTH), das Ammoniumsalz vonTANH (sTANH) und sechs neue Komplexe der Formeln Rh(MT)2Cl · 2H2O, Pd(MTH)2Cl2, Pt(MTH)2Cl4, Au(MTH)Cl3, Pd(TANH)2Cl2 und Au(TAN −)Cl. Das thermische Verhalten der Verbindungen wurde ebenfalls untersucht.
    Notes: Abstract Some news thiopyrimidine derivatives and complexes [4-amino-5-nitroso-6-oxo-1,2,3,6-tetrahydro-2-thio-pyrimidine (TANH), its 2-methylthio derivative (MTH), the ammonium salt ofTANH (sTANH) and six new complexes of formulas: Rh(MT)2Cl · 2H2O, Pd(MTH)2Cl2, Pt(MTH)2Cl4, Au(MTH)Cl3 Pd(TANH)2Cl2 and Au(TAN −)Cl] have been synthesized and characterized by elemental analysis, IR and1H-NMR spectroscopy techniques. The thermal behaviour of all compounds has also been studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00815316
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Structure of potassium theobrominium tetrakis(thiocyanato)palladate(II) monohydrate (1993)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 49 (1993), S. 580-582 
    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/S0108270192010990
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Crystal and molecular structure of 2:1 complex of 1,3-dimethyl violuric acid-mercury(II) (1990)
    Springer
    Journal of chemical crystallography 20 (1990), S. 301-306 
    Details
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The complex (C6H6N3O4)2Hg crystallizes in space groupP¯1, witha=16.635(2),b=11.765(2)c=9.288(2),α=98.74(2),β=102.99(2),γ=108.13(1)°,V=1634.3(6) Å3 andZ=4. The structure was solved by the heavy-atom method, and refined by full-matrix least squaresR andR w values of 0.051 and 0.044, respectively, for 3108 uniquc reflections. The Hg(II) atom displays a highly distorted tetrahedral coordination geometry. It is bonded to two nitrogens and two oxygens of the two modified uracil base ligands in an unequalcis-bidentate manner. The ligand exists in the triketo form. The crystal structure is stabilized by C-H⋯O interactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01187257
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Synthesis, characterization, and crystal structure of 1,3,7,9-tetramethylpyrido-[2,3-d∶6,5-d′]-dipyrimidine-2,4,6,8-tetrone (1994)
    Springer
    Journal of chemical crystallography 24 (1994), S. 465-468 
    Details
    ISSN: 1572-8854
    Keywords: Pyrimidine ; uracil ; crystal structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A new and easy method for the preparation of 1,3,7,9-tetramethylpyrido-[2,3-d∶6,5-d′]-dipyrimidine-2,4,6,8-tetrone is described. The structure of this compound has been solved by means of X-ray diffraction methods. The chemical characterization by spectral (mass, ultraviolet, infrared, and proton nuclear magnetic resonance) and thermal (thermogravimetry and differential scanning calorimetry) method is also reported. The compound is monoclinic, space groupP21/c,a=12.720(5),b=13.688(7),c=8.079(2) Å, β=107.06(4)°,Z=4. The structure consists of discrete tricyclic molecules, stacking playing an important role in crystal packing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01666096
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Thermal studies on metal complexes of 5-nitroso-pyrimidine derivatives (1984)
    Springer
    Journal of thermal analysis and calorimetry 29 (1984), S. 1053-1059 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Folgende Cadmium(II)-Komplexe von deprotoniertem 6-Amino-5-nitrosouracil (AH), deprotoniertem 6-Amino-3-methyl-5-nitroso-uracil (BH) und neutralem 6-Amino-1-methyl-5-nitroso-uracil (CH) wurden hergestellt: CdA2 · 3 H2O, CdB2· 2 H2O, CdB2 und CdCl2(CH)2 · 2 H2O. Das thermische Verhalten dieser Komplexe wurde mittels TG und DSC untersucht. Die Dehydratisierung der Komplexe verlÄuft in nur einem Schritt. Die Enthalpiewerte für diese Prozesse liegen im Bereich von 42.7–80.5 kJ · mol−1 H2O. Die pyrolytischen Reaktionen verlaufen im Temperaturbereich von 630–900
    Abstract: РЕжУМЕ пОлУЧЕНы И ИсслЕДОВА Ны МЕтОДОМ тг И Дск кОМплЕксы кАДМИь ОБЩ ЕгО сОстАВА CdA2 · 3 H2O, CdB2 · 2 H2O, CdB2 И CdCl2(CH)2 · 2 H2O, гДЕ A — ДЕпРОтОНИРОВАННыИ 6-АМИНО-5-НИтРОжОУРАцИл, B — ДЕпРОтОНИРОВАННыИ 6-АМИНО-3-МЕтИл-5-НИтРОжО УРАцИл И CH — НЕИтРАльНыИ 6-АМИНО-1-МЕтИл-5-НИтРОжОУРАцИ л. пРОцЕссы ДЕгИДРАтА ц ИИ кОМплЕксОВ пРОтЕкАУт В ОДНУ стАД ИУ. жНАЧЕНИь ЁНтАльпИ И РЕАкцИИ ДЕгИДРАтАцИИ НАхОДь тсь В ОБлАстИ жНАЧЕНИИ 42.7–80.5 кДж · МОль−1. РЕАкцИИ пИРОлИжА жАкАНЧИВАУтсь В ОБлА стИ тЕМпЕРАтУР 630–900
    Notes: Abstract The following cadmium(II) complexes of deprotonated 6-amino-5-nitroso-uracil (AH), deprotonated 6-amino-3-methyl-5-nitroso-uracil (BH) and neutral 6-amino-1-methyl-5--nitroso-uracil (CH) have been prepared and their thermal behaviour studied by TG and DSC techniques: CdA2 · 3 H2O, CdB2 · 2 H2O, CdB2 and CdCl2(CH)2 · 2 H2O. Dehydration processes of these complexes take place in only one step and the enthalpy values associated with them are comprised in the 42.7–80.5 kJ · mole−1 H2O range. The pyrolytic reactions finish in the 630–900
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02188858
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Thermal behaviour of xanthinium salts of Zn(II), Cd(II) and Hg(II) (1983)
    Springer
    Journal of thermal analysis and calorimetry 28 (1983), S. 3-9 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung (XanH+)2(MCl 4 2- )-Salze (worin XanH+ die protonisierte Form von Xanthin bedeutet und M=Zn(II), Cd(II) oder Hg(II) ist) wurden synthetisiert und mit IR,1H-NMR, TG und DSC untersucht. In diesem Fall liegt keine Koordination des Metalls mit dem Liganden vor, und es bildet sich eine salzartige Struktur aus. Das kationische Proton ist an N(7) lokalisiert. Die thermische Zersetzung dieser Salze erfolgt in zwei Schritten: (i) Dehalogenisierung und (ii) Zersetzung. Dehalogenierungsenthalpien wurden aus DSC-Kurven berechnet.
    Abstract: Резюме Синтезированы и изуч ены с помощью ИК- и ПМР-спектроскопии, а т акже методами ТГ и ДСК соли [XanH+]2[MCl 4 2− ], где XanH+ — протонированная форма ксантина, а M — двухвалентные цин к, кадмий и ртуть. В эти х солях металл не образует ко ординационной связи с лигандом, а обр азует солеобразную с труктуру. Протонирование ксан тина происходит по азоту в седьмом положении. Те рмическое разложение солей про исходит в две стадии: дегалоге нирование и разложен ие. Из ДСК-кривых были вычис лены энтальпии реакции дегалогенир ования.
    Notes: Abstract Salts [XanH+]2[MCl 4 2- ] (where XanH+=protonated form of xanthine and M=Zn(II), Cd(II) and Hg(II) have been synthesized and studied by IR,1H-NMR, TG and DSC. The metal is not coordinated to the ligand and forms a salt-like structure. The cationic proton is on N(7). Thermal decomposition of these salts occurs in two steps: (i) dehalogenation and (ii) decomposition. Dehalogenation enthalpies have been calculated from DSC curves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02105273
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Metal complexes of some 5-nitrosopyrimidine derivatives (1987)
    Springer
    Monatshefte für Chemie 118 (1987), S. 329-335 
    Details
    ISSN: 1434-4475
    Keywords: Complexes ; Uracil ; Viouluric acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Komplexe des TypesM(ADNU)2 [M=Cu(II), Ni(II), Pd(II), Pt(II); HADNU=6-Amino-1,3-dimethyl-5-nitroso-uracil], Co(ADNU)3·5H2O, Pt(ADNU)2Cl2·0.5H2O, Pd(ADU)2 und Pt(ADU)2Cl2 (mit HADU=1,3-dimethylviolursäure) wurden synthetisiert und mittels Elementaranalysen, IR, magnetischen Messungen und Thermoanalyse (TG und DSC) charakterisiert. Alle isolierten Komplexe der allgemeinen FormelnM(ADNU)2 oderM(ADU)2 waren von quadratisch planarer Geometrie, während die anderen sich als octaedrisch erwiesen. Beide Liganden komplexieren zweizähnig über die Stickstoff- und Sauerstoffatome der 5-Nitroso- und 6-Oxo-Gruppen.
    Notes: Abstract M(ADNU) 2 complexes [whereM=Cu(II), Ni(II), Pd(II) and Pt(II); HADNU=6-amino-1,3-dimethyl-5-nitroso-uracil], Co(ADNU)3·5H2O, Pt(ADNU)2Cl2·0.5H2O, Pd(ADU)2 and Pt(ADU)2Cl2 (where HADU=1,3-dimethyl violuric acid) have been synthesized and characterized by elemental analysis, IR, magnetic measurements and thermal analysis (TG and DSC). All the isolated complexes of formulasM(ADNU)2 orM(ADU)2 show a square planar geometry, whereas the others are octahedral. Both ligands coordinate in bidentate form through the nitrogen and oxygen atoms of the 5-nitroso and 6-oxide groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00809943
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Synthesis, characterization and thermal behaviour of some metal indigodisulphonates (1984)
    Springer
    Journal of thermal analysis and calorimetry 29 (1984), S. 515-521 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Einige Indigodisulphonate von Cr(III), Zn(II), Ag(I), Zn(II) und Cd(II) wurden in wäßrigem Medium dargestellt und durch Elementaranalyse, diffuse Reflektions-IR-Spektren und magnetische Messungen charakterisiert. Das thermische Verhalten dieser Salze wurde mittels TG, DTG und DSC untersucht. Die Indigodisulphonate von Cu(II), Zn(II) und Cd(II) kristallisieren mit 2 Molekülen Kristallwasser, die von Cr(III) mit 12 Molekülen. Die Endprodukte der thermischen Zersetzung wurden infrarotspektroskopisch und röntgendiffraktometrisch identifiziert. Die Werte der Dehydratisierungsenthalpien wurden aus den DSC-Kurven berechnet.
    Abstract: Резюме В водной среде подуче ны некоторые индигодисульфонаты серебра, трехвалентн ого хрома и двухвалентны х меди, цинка и кадмия. Соли охарактеризованы эл ементарным анализом, ИК спектрам и диффузного отражен ия и измерением магнитно й восприимчивости. Термическое поведен ие синтезированных с олей было исследовано методам и ТГ, ДТГ и ДСК. Индигодис ульфонаты хрома, меди, цинка и кадмия содержали, соо тветственно, 12, 2, 2 и 2 молекулы кристалл изационной) воды. Коне чные продукты термическо го разложения были иден тифицированы ИК спек троскопией и рентгено-диффракцио нным методом. Из ДСК-кривых были вычислены значе ния энтальпий реакций де гидратации.
    Notes: Abstract Some indigodisulphonates of Cr(III), Cu(II), Ag(I), An(II) and Cd(II) have been prepared in aqueous medium and characterized on the basis of elemental analyses, diffuse reflectance infrared spectra and magnetic measurements. The thermal behaviours of these salts were studied by TG, DTG and DSC techniques. Cr(III), Cu(II), Zn(II) amd Cd(II) indigodisulphonates contain 12, 2, 2 and 2 molecules of crystallization water, respectively. The end-products of thermal decomposition have been verified by infrared spectroscopy and X-ray diffraction. Values of dehydration enthalpies have been calculated from the DSC curves.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01913460
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...