ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
    ISSN: 1434-4475
    Keywords: Crystal structure analysis ; Salicylaldehyde S-methylisothiosemicarbazone
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Salicylaldehyd-S-methylisothiosemicarbazon wurde dargestellt und die Kristallstruktur vermessen: C9H11N3OS, monoklin, P21/n,a=5,169(4),b=16,853(10),c=11,367(5)Å, β=92,48(1)°,V=989,3(18)Å3,Z=4,d x =1,405 g cm−3. Die Struktur wurde mit Hilfe derPatterson-undFourier-Methode bestimmt und anisotropisch bis zu einemR-Wert von 0,046 verfeinert. Das Molekül ist praktisch eben, wobei ein grundlegender Unterschied zwischen der protonierten (H2 L) und der deprotonierten Form in den Komplexver-bindungen besteht. Die Formen unterscheiden sich durch eine Drehung um ca. 180° um die C1—N2-Doppelbindung. Die Moleküle H2 L sind durch Wasserstoffbindungen um das Symmetriezentrum zu einem Dimeren verknüpft.
    Notes: Abstract The crystal structure of salicylaldehyde S-methylisothiosemicarbazone together with the synthesis applied are reported: C9H11N3OS, monoclinic, P21/n,a=5.169(4),b=16.853 (10),c=11.367(5)Å, β=92.48(1)°,V=989.3(18)Å3,Z=4,d x =1.405g cm−3. The structure was solved by the heavy atom method and refined anisotropically to a residualR=0.046. The molecule is practically co-planar. There is only one basic difference between the title compound H2 L and its deprotonated and complexed forms reported hitherto: the nearly 180° difference in rotation about the formal double bond C1—N2. The molecules form hydrogen bonded dimers around $$\bar 1$$ .
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 33 (1977), S. 1098-1099 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the synovial membrane of the mouse, morphological features associated with acitve secretion are unusually well developed in cells immediately subjacent to the lining layer (in the position of B cells), comparable to those of cells known to elaborate polypeptides.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Mutation Research/Environmental Mutagenesis and Related Subjects 74 (1980), S. 219 
    ISSN: 0165-1161
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 34 (1988), S. 1263-1271 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung In dieser Arbeit wurde die thermische Zersetzung oktaedrischer Ni(II)-Komplexe mit Hydraziden der 1-Naphthylessigsäure (L) des Types NiLn X 2·mH2O untersucht, wobein=2 bzw. 3,m=2 bzw. 4 undX=Cl, Br, I, NCS, OAc bzw. 1/2 SO4 ist. Die thermische Zersetzung wurde in Luftbzw. Stickstoffatmosphäre bis zu Temperaturen von 1000 C durchgefürt und der wahrscheinlichste Mechanismus des Prozesses gegeben.
    Abstract: РЕжУМЕ пРОВЕДЕНО ИсслЕДОВА НИЕ тЕРМИЧЕскОгО РАжлОжЕНИь ОктАЁДРИ ЧЕскИх кОМплЕксОВ НИкЕль с гИДРАжИДОМ 1-Н АФтИлУксУсНОИ кИслО ты (L) тИпА NiLn X 2·mH2O, гДЕn=2 И 3,m=2 И 4, АX=Cl, Br, I, NCS, OAc И 1/2SO4. тЕРМИЧЕскОЕ Р АжлОжЕНИЕ пРОВЕДЕНО В АтМОсФЕРЕ ВОжДУхА И АжОтА ДО тЕМпЕРАтУРы 1000
    Notes: Abstract The thermal decompositions of the octahedral complexes of Ni(II) with 1-naphthylacetic acid hydrazide (L), of the type NiLnX2·mH2O, wheren=2 and 3,m=2 and 4, andX=Cl, Br, I, NCS, OAc and 1/2 SO4, were studied in both air and nitrogen atmospheres at temperatures up to 1000
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 36 (1990), S. 2375-2382 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Mittels DTA und DDTA wurde untersucht, wie die Zugabe von Jod zu dem binären System As-Se die thermische Stabilität der so gebildeten ternären Gläser beeinflußt. Die untersuchten Gläser entsprechen verschiedenen Regionen des Phasendiagrammes, d.h. sie besitzen einen unterschiedlichen As- bzw. I-Gehalt und enthielten unterschiedlich geartete Struktureinheiten. Bei den untersuchten jodhaltigen ternären Systemen tritt der Kristallisationseffekt bei niedrigeren Temperaturen auf als bei den binären Gläsern As40Se60, das gleiche gilt für die Schmelz- als auch für die Erweichungstemperatur. Sowohl bei den binären als auch bei den ternären Systemen wurde die Aktivierungs energie für den Kristallisationsprozeß ermittelt. Das Glas As40Se60 zeigte eine etwas höhere Aktivierungsenergie, d.h. eine etwas geringere Neigung zur Kristallisation als das ternäre System. Für die kritische Abkühlgeschwindigkeit der Schmelzen zum Erreichen eines minimalen Kristallinitätsgrades wurden bei den binären (As2Se3) und ternären (AsSeI) Systemen annähernd gleiche Werte bestimmt.
    Notes: Abstract The effect of adding iodine to the binary systems As-Se on the thermal stability of the ternary glasses thus formed was investigated by DTA and DDTA. The investigated glasses corresponded to different regions of the phase diagram, i.e. they had different contents of As and I and, consequently, contained different types of structural units. In the investigated ternary systems with iodine, the crystallization effect appears at a lower temperature than in the binary glass As40Se60, and the same holds for the temperatures of softening and melting. For both binary and ternary systems, the activation energies of crystallization were determined. The glass As40Se60 exhibited a somewhat higher activation energy, i.e. a somewhat lower tendency to crystallize than the ternary system. The critical cooling rates of the melts for minimum degree of crystallinity were estimated. The obtained values are approximately equal for the binary (As2Se3) and ternary (AsSeI) systems.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 36 (1990), S. 2427-2439 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wird die thermische Zersetzung und spektroskopische Charakterisierung (Reflexionsvermögen und IR-Spektren) neu synthetisierter Dioxovanadium(V)-Komplexe der allgemeinen Formel NH4[VO2(L)] beschrieben, wobei L das Dianion des dreizahnigen Liganden Salicylaldehyd-thiosemicarbazon (ONS), halogensubstituiertes Salicylaldehyd- bzw. 2-Hydroxy-1-naphthaldehyd-S-methyl-isothiosemicarbazon (ONN) ist.
    Notes: Abstract The thermal decomposition and spectroscopic (reflectance and IR spectra) characterization of the newly synthesized square-pyramidal dioxovanadium(V) complexes of the type NH4[VO2(L)] (L is the dianion of the terdentate ligands salicylaldehyde thiosemicarbazone (ONS), halogen-substituted salicylaldehyde and 2-hydroxy-1-naphthaldehyde S-methylisothiosemicarbazones (ONN)) are described.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 34 (1988), S. 1015-1021 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Mittels Röntgendiffraktionsmethoden wurden Gitterzellenkonstanten sowie die Raumgruppe der untersuchten Verbindung bestimmt. Durch Analyse der erhaltenen Diffusions-Reflexionsspektren von kristallinem Pulver und des Absorptionsspektrums einer alkoholischen Lösung der Verbindung war es möglich, die Absorptionsbanden des Kristallkomplexes NiL2(ClO4)2·3H2O zu identifizieren und quantitativ zu charakterisieren. Anwendung von Differentialthermoanalyse ermöglicht die Bestimmung des Mechanismus der Zersetzungsreaktion der Verbindung. Durch diese Messungen, einschliesslich der Bestimmung der Anzahl nichtkoordinierter Wassermoleküle, wurde die erwartete Konfiguration des Grundmoleküles überprüft.
    Abstract: Резюме Методом рентгеностр уктурного анализа определены параметр ы крисаллической решетки и пространст венная группа для ком плекса NiL2(ClO4)2·ЗН2О, где L-N-γ-пирид ил-4фенил-бензамидгид разон. L-N-γ-пиридил-4фенил-бенз амидгидразон. Анализ полученного с пектра диффузного от ражения кристаллического по рошкообразного комп лекса, а также спектра его поглощен ия в спирте, представил возможно сть идентифицироват ь и количественно охара ктеризовать полосы поглощения кристалл ического комплекса. П рименения дифференциального т ермического анализа позволило оп ределить механизм те рмического разложения этого ком плекса. Исходя из проведенных измерен ий была подтверждена конфигурация основн ой молекулы, включая определение числа мо лекул некоординиров анной воды.
    Notes: Abstract The unit cell parameters and the space group of the investigated compound were determined by means of X-ray diffraction. Analysis of the diffusion-reflection spectra of the crystalline powder and the absorption spectra of its alcoholic solutions permitted identification and quantitative characterization of the absorption bands of the crystalline complex of NiL2(ClO4)2·3H2O. Application of differential-thermal analysis allowed determination of the mechanism of thermal decomposition of the compound. From these measurements, the expected configuration of the basic molecule was verified, involving determination of the number of non-coordinated water molecules.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 47 (1996), S. 879-886 
    ISSN: 1572-8943
    Keywords: complexes ; cobalt(II) ; 3(5)-amino-4-acetyl-5(3)-methilpyrazole ; thermal decomposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The thermal decomposition of tetrahedral cobalt(II) complexes with 3(5)-amino-4-acetyl5(3)-methylpyrazole (HL) of the general formula [Co(HL)2X2] (X=Cl, Br, I, NCO, NCS) and octahedral [Co(HL)2(H2O)4](NO3)2 and [Co(HL)2−N(CN)2}2] complexes was investigated in air atmosphere in the interval from room temperature to 1000°C. Decomposition of the complexes occurred in several successive endothermic and exothermic processes, and the residue was in all cases CoO.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 58 (1999), S. 589-596 
    ISSN: 1572-8943
    Keywords: Fe(III) complexes ; thermal analysis ; thiosemicarbazide-based ligands
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The paper describes the results of differential thermal analysis of the octahedral Fe(III) complexes of the general formula [Fe(HLn)2]Cl and Fe(HL3)L3, as well as of the corresponding ligands H2Ln (H2Ln — tridentate salicylaldehyde semi thiosemi- and S-methylisothiosemi-carabazones with n=1, 2 and 3 respectively). The decomposition of the complexes involving sulphur-containing ligands (H2L2 and H2L3) starts with sulphur elimination. In case of the complexes [Fe(HL2)]Cl and [Fe(HL3)]Cl sulphur evolves independently, whereas with Fe(HL3)L3 it is eliminated within the SCH3 group. In the former case, sulphur elimination takes place at the same temperature for both complexes. The change in the coordination mode, being a consequence of the replacement of O by S, has no essential effect on thermal stability of the coordination polyhedron. The complexes involving ONN coordination, realized with the H2L3 ligand, exhibit a comparatively highest thermal stability of the coordination polyhedron.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 15 (1996), S. 678-679 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...