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
Filter
  • 1985-1989  (6)
  • 1980-1984  (8)
Collection
Years
Year
  • 1
    ISSN: 1520-6041
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The reaction of bis(hydroxymethyl)phenylphosphane withtert-butyldichlorophosphane leads to the formation ofcis-2-tert-butyl-5-phenyl-1,3,2,5-dioxadiphosphorinane (1). Thecis configuration was definitively proven by the X-ray diffraction study of the 2, 5-dithioxo derivative (2), which was obtained from (1) by a stereoselective reaction. The diselenoxo compound (3) was also prepared. These three new compounds were subjected to a complete NMR study (1H,13C,31P, and77Se).
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of chemical crystallography 13 (1983), S. 201-210 
    ISSN: 1572-8854
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract From the1H,13C, and119Sn NMR spectra at different temperatures, it is concluded that the 5-alkyl-5-aza-2,8-dioxa-1-stanna(II)bicyclo[3.3.0]octanes dimerize in nonpolar solvents. The barrier for dimerization is lower (ΔG
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 467 (1980), S. 203-210 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Structure, and Molecular Mobility of [(o-Diorganophosphinylmethyl)phenyl]-diorganotin HalidesThe oxidation and halogenation of (o-triorganostannylbenzyl)diorganophosphines, prepared from o-lithiobenzyl-diorganophosphines and triorganotin halides yields the [(o-diorganophosphinylmethyl)phenyl]diorganotin halides 6-10. IR, 1H- and 31P-NMR data confirm for 6-10 a complexcyclic structure with pentacoordinated tin. From the temperature dependence of the 1H-NMR spectra follows a configuration inversion at the tin atom in these compounds.
    Notes: Die Oxidation und Halogenierung von (o-Triorganostannylbenzyl)-diorganophosphinen, dargestellt aus o-Lithiobenzyl-diorganophosphinen und Triorganozinnhalogeniden, liefert die [(o-Diorganophosphinylmethyl)-phenyl]-diorganozinnhalogenide 6-10. IR-, 1H-und 31P-NMR-Daten bestätigen für 6-10 eine komplexcyclische struktur mit pentakoordiniertem Zinn. Aus der Temperaturabhängigkeit der 1H-NMR-Spektren folgt ein Konfigurationswechsel am Zinn. Atom in diesen Verbindungen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 5-Alkyltriptychoxazastannolidones and 4,5,6,11-Tetramethyltriptychdiazastannolidone  -  Atrane-like Organotin Derivatives of the Nitrilotriacetic Acid and the Nitrilotriacetic Acid TriamideAlkylphenyltin oxides react with nitrilotriacetic acid in dimethylformamide/toluene under elemination of water and benzene to the 5-alkyltriptychoxazastannolidones. The reaction of methyltin triethoxide with nitrilotriacetic-N,N′,N″-trimethyltriamide leads to the 4,5,6,11-tetramethyltriptychdiazastannolidone. The structure of these compounds is investigated by 1H-, 13C- and 119Sn-n.m.r. measurements.
    Notes: Alkylphenylzinnoxide reagieren mit Nitrilotriessigsäure in DMF/Toluen unter Eliminierung von Wasser und Abspaltung von Benzen zu den 5-Alkyltriptychoxazastannolidonen. Die Reaktion von Methylzinntriethoxid mit Nitrilotriessigsäure-N,N′,N′-trimethyltriamid führt zum 4,5,6,11-Tetramethyltriptychdiazastannolidon. Die Struktur der Verbindungen wird 1H-, 13C- und 119Sn-NMR-spektroskopisch aufgeklärt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 502 (1983), S. 158-164 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 5-Aza(oxa, thia)-2, 8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octanes  -  Intramolecular Stabilized StannylenesBy the reaction of tin(II) butoxide with mercaptanes of the general type E(CH2—CH2SH)2 (E = N-t-Bu, NMe, O, S) at temperatures up to 50°C the 5-aza(oxa, thia)-2, 8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octanes I - IV are obtained in high yields. The compounds are monomeric in solution. Contrary at higher reaction temperatures (80°C) the spiro-compounds of the type [E(CH2CH2S)2]2Sn (V - VIII) are formed. Some typical stannylene reactions of I - IV with BF3, Cr(CO)6, Br2, and PhS—SPh show the high reactivity of the compounds. Their structure is investigated by 1H, 13C, and 119Sn n.m.r., i.r., and Mössbauer spectroscopy.
    Notes: Durch Umsetzung von Zinn(II)-butoxid mit Mercaptanen des allgemeinen Typs E(CH2CH2SH)2 (E = N-t-Bu, NMe, O, S) werden bei Temperaturen bis 50°C die 5-Aza(Oxa, Thia)-2, 8-dithia-1-stanna(II)-bicyclo[3.3.01,5]octane in hohen Ausbeuten erhalten. Die Verbindungen sind monomer in Lösung. Bei höheren Reaktionstemperaturen (80°C) resultieren dagegen vorzugsweise die Spiroverbindungen des Typs [E(CH2CH2S)2]2Sn (V - VIII). Einige typische Stannylenreaktionen von I - IV mit BF3, Cr(CO)6, Br2 und PhS—SPh belegen die hohe Reaktivität der Verbindungen. Ihre Struktur wird durch 1H-, 13C-, 119Sn-NMR, IR- und Mößbauer-Spektren bewiesen.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 567 (1988), S. 122-130 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: NMR-Untersuchungen an Stannabicycloundecanen des Typs RSn(CH2CH2CH2)3NEs werden 1H-, 13C- und 119Sn-NMR-Daten von sieben Stannabicycloundecanen des Typs RSn(CH2CH2CH2)3N (1, R = Cl; 2, R = Br; 3, R = I; 4, R = OH; 5, R = SPh; 6, R = Me; 7, R = Sn(CH2CH2CH2)3N) mitgeteilt. Aus den Protonen-NMR-Koaleszenzdaten bei tiefer Temperatur wird ΔGTc* für die Racemisierung des Bicyclo[3.3.3]-Gerüstes zu 37 ± 1 kJ/mol bestimmt. Die Werte sind unabhängig vom Substituenten R. In den entsprechenden Siliciumderivaten (R = Me) werden geringere Aktivierungsparameter gefunden.
    Notes: The 1H, 13C, and 119Sn NMR data of seven stannabicycloundecanes of the type RSn(CH2CH2CH2)3N (1, R = Cl; 2, R = Br; 3, R = I; 4, R = OH; 5, R = SPh; 6, R = Me; 7, R = Sn(CH2CH2CH2)3N) are reported. From 1H NMR coalescence data at low temperature the free activation enthalpies for the racemisation of the bicyclo[3.3.3]skeleton were estimated to be 37 ± 1 kJ/mol. They are independent of the substituent R. However, it decreases when the tin atom is replaced by silicon for R = Me.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 21 (1983), S. 315-318 
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The analysis of the 1H NMR spectra of 2,8-dithia-1,5-diphosphabicyclo[3.3.0]octane, 2,8-dithia-1-phospha-5-azabicyclo[3.3.0]octane and 2,8-dithia-1-arsa-5-phosphabicyclo[3.3.0]octane is supported by means of 2D- J-resolved NMR measurements. The spectra suggest a preferred conformer with strong puckering of the fused five membered rings.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of Bis(2-mercaptoethyl)phosphines with Organotin Compounds. Molecular Structure of a Tin Containing Sixteen-membered RingThe reaction of bis(2-mercaptoethyl)phosphine with di-t-butyltin dimethoxide yields mixture of oligomers of the type [t-Bu2Sn(SCH2CH2)2Pr]n (R = Me, Ph) from which the trans-configurated dimers (n = 2) have been isolated. By the reaction with sulphur and selenium, respectively, these dimers were transformed to the corresponding thioxo and selenoxo derivatives.The sixteen-membered ring trans-[t-Bu2Sn(SCH2CH2)2P(S)Ph]2 crystallizes in the space group P21/n with the unit cell dimensions a 1350.9, b 1310.2, c 1500.3 pm, β 96.36° and does not exhibit any intramolecular Sn—P interaction: The 1,5-diorgano-1-chloro-5-elementa-1-stanna(IV)-bicyclo-[3.3.01,5]octanes R(Cl)Sn(SCH2CH2)2E (6, R = Ph, E = PPh; 7, R = Ph, E = NMe) have been prepared from the corresponding sodium dithiolates and phenyltrichlorostannane. The transannulare Sn—P and Sn—N interactions in 6 and 7 are confirmed by 31P and 119Sn NMR investigations.
    Notes: Die Reaktion von Bis(2-mercaptoethyl)phosphinen mit Di-t-butylzinndimethoxid liefert Mischungen von Oligomeren des Typs [t-Bu2Sn(SCH2CH2)2PR]n (R = Me, Ph), von denen die trans-konfigurierten Dimere (n = 2) isoliert wurden. Durch Reaktion mit Schwefel bzw. Selen wurden diese in die entsprechenden Thio- bzw. Selenoderivate überführt. Der Sechzehnring trans-[t-Bu2Sn(SCH2CH2)2P(S)Ph]2 4 kristallisiert in der Raumgruppe P21/n mit den Gitterkonstanten a 1350,9, b 1310,2, c 1500,3 pm und β 96,36°, er enthält keine intramolekularen Sn—P.-Wechselwirkungen. Die 1,5-Diorgano-1-chloro-5-element-1-stanna(IV)-bicyclo[3.3.01,5]-octaneR(Cl)Sn(SCH2CH2)2E (6, R = Ph, E = PPh; 7, R = Ph, E = NMe) wurden aus den entsprechenden Natriumdithiolaten und Phenyltrichlorstannan erhalten. Die transannularen Sn—P- und Sn—N- Wechselwirkungen in 6 und 7 werden durch 31P- und 119Sn-NMR-Untersuchungen bestätigt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 463 (1980), S. 123-131 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Association Behaviour of Strannatranes1-Alkylstannatranes (R = Me, Et, Bu, Phenyl) associate in unpolar solvents to relatively stable trimeric units. In aqueous solution 1-methylstannatran displays no autoassociation. 1-t-Butylstannatran, 1-o-tolylstannatran, and 1-alkylthiostannatranes are monomeric in all kinds of solvents. The association behaviour is characterized by molecular mass estimation and 1H-, 13C-, and 119Sn-NMR measurements.
    Notes: Es wird über einige neue Stannatrane und Thiostannatrane berichtet und gezeigt, daß die 1-Alkylstannatrane in unpolaren Lösungsmitteln zu relativ stabilen trimeren Einheiten assoziieren. In wäßriger Lösung zeigt 1-Methylstannatran keine Selbstassoziation. 1-t-Butylstannatran, 1-o-Tolylstannatran und 1-Alkylthiostannatrane sind in allen Lösungsmitteln monomer. Das Assoziationsverhalten wird durch Molekulargewichtsbestimmung und 1H-, 13C- und 119Sn-NMR-Messungen charakterisiert.
    Additional Material: 5 Ill.
    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...