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  • Inorganic Chemistry  (10)
  • Ab-initio-Rechnungen  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 97 (1964), S. 2029-2036 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Trihalogensilyl-bis-trimethylsilyl-amine, [(CH3)3Si]2N—SiX3, mit X=H, F, Cl, Br, J, NCO wurden auf verschiedenen Wegen (Rkk. 1, 2, 4, 5, 7) dargestellt und in ihren physikalischen nd chemischen Eigenschaften charakterisiert; an Hand von IR- und NMR-Spektren werden ihre Strukturmerkmale diskutiert.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0009-2940
    Keywords: Dimethylaminobis(trifluoromethyl)borane ; Nitriles ; Cyclopropanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dimethylaminobis(trifluoromethyl)borane, (CF3)2BNMe2 (A), reacts with Cl(CH2)3CN to yield [Cl(CH2)2CH(CN)](CF3)2B·NHMe2 (1) whereas Br(CH2)3CN and A combine in a 1:2 ratio to form [cyclo-C3H4(CN)](CF3)2B·NHMe2 (2) and Br(CF3)2B·NHMe2. Br(CH2)nCN and A yield [Br(CH2)n-1 CH-(CN)](CF3)2B·NHMe2, n=4 (3), n=5 (4) and n=6 (5). Compound 2 and (NCCH2)CF3)2B·NHMe2 can be alkylated at nitrogen with CH3I/KOH in ether to yield [cyclo-C3H4(CN)]-(CF3)2B·NMe3 (6) and (NCCH2)(CF3)2B·NMe3 (7), respectively. treatment of 1 and 3 with hydroxide in ether gives the respective five- and six-membered heterocycles (CF3)2 (8) and (9). Reduction of the nitrile group with (iBu)2Alh in CH2Cl2 at -50°C followed by hydrolysis furnishes the corresponding aldehydes (OCHCH2) (CF3)2B·NMe3 (10), [cyclo-C3H4(CHO)](CF3)2B·NMe3 (11) and (12). The structure of 2 was determined by an X-ray investigation.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0044-8249
    Keywords: Ab-initio-Rechnungen ; Millimeterwellenspektroskopie ; Siliciumverbindungen ; Strukturaufklärung ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 349 (1967), S. 124-130 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The infrared and RAMAN spectra of the disilylcyclodisilazanes (B) with X = X′ = CH3, H, Cl, Br, J, OCH3, NHCH3, N(CH3)2, C4H9 and X = Cl, X′ = NHSi(CH3)2Cl are reported and assigned. The Si4N2, skeleton of B exhibits characteristic infrared and RAMAN frequencies.
    Notes: Die Infrarot- und RAMAN-Spektren der substituierten Disilylcyclodisilazane mit X = X′ = CH3, H, Cl, Br, J, OCH3, NHCH3, N(CH3)2, C4H3 sowie X = Cl, X′ = NHSi(CH3)2Cl werden mitgeteilt und zugeordnet. Das Si4N2-Skelett gibt zu lagekonstanten, charakteristischen Infrarotbanden und RAMAN-Linien Anlaß.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 363 (1968), S. 24-32 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The infrared and Raman spectra of PS43- and P2S64- are reported, assigned on the basis of Td and D3d symmetry, respectively, and compared with SiCl4 and Si2Cl6 for which complete infrared spectra are given. The PS stretching force constants (2.53 and 2.78 mdynes/Å) are smaller than the values for the SiCl bond in the corresponding isoelectronic species SiCl4 (3.03) and Si2Cl6 (2.92 mdynes/Å).
    Notes: Die Infrarot- und Raman-Spektren von PS43- (Na3PS4 · 8H2O) und P2S64- (Na4P2S6 · 6 H2O) werden mitgeteilt, den Normalschwingungen für die Punktgruppen Td bzw. D3d zugeordnet und mit den vervollständigten Spektren der isoelektronischen Molekeln SiCl4 und Si2Cl6 verglichen. Die PS-Valenzkraftkonstanten (2,53 im PS43-, 2,78 mdyn/Å im P2S64-) sind deutlich kleiner als die entsprechenden Parameter der SiCl-Bindung (3,03 bzw. 2,92 mdyn/Å).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 321 (1963), S. 208-216 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: We succeeded in synthesizing four formerly unknown compounds having a silicon urea framework, , by the interactions between C6H5NCO and silyl amines; Si(NCO)4 and NH3; urea and hexamethyl disilazane.
    Notes: Es gelang, durch Umsetzung von Phenyl-N-cyanat mit Silylaminen, von Siliciumtetra-N-cyanat mit Ammoniak und von Harnstoff mit Hexamethyldisilazan die bisher unbekannten Verbindungen I-IV mit dem Silicium-Harnstoff-Gerüst aufzubauen. Ihre chemischen und physikalischen Eigenschaften werden mitgeteilt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 360 (1968), S. 97-103 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The infrared and Raman spectra of several F5TeOH derivatives (see Inhaltsübersicht) are reported and assigned. The F5Te group exhibits characteristic frequencies which are only little affected by the rest of the molecule.
    Notes: Die Infrarot- und Raman-Spektren folgender F5TeOH-Derivate wurden aufgenommen und gedeutet: F5TeOH, F5TeOTeF5, F5TeOSO2OH, F5TeOSO2F, F5TeOSO2Cl und F5TeOSO2 OTeF5. Die F5Te-Gruppenschwingungen werden durch den Rest der Molekel nur unwesentlich beeinflußt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 365 (1969), S. 243-254 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The cleavage of trimethylsilyl amines Me3SiNRR′ by TiCl4 yields dialkylaminotitanium compounds RR′NTiCl3 (R, R′ = CH3, C2H5, iso-C3H7). According to their properties and their far infrared spectra these compounds are halogen-bridged oligomers which react with an excess of Me3SiNRR′ to products of the formula (RR′N)≤1.8TiCl≥2.2. If R is C6H5, the aminotitanium derivatives have only the approximate composition RR′NTiCl3. From the reaction of TiCl4 with Me3SiNHC6H5 only TiCl4 · 2 C6H5NH2 could be obtained.
    Notes: Die Spaltung von Trimethylsilyl-diorganylaminen Me3SiNRR′ mit TiCl4 eignet sich zur Darstellung von Dialkylamino-titanchloriden RR′NTiCl3 (R, R′ = CH3, C2H5, iso-C3H7). Diese Verbindungen sind, wie aus ihren vollständigen IR-Spektren hervorgeht, über Cl-Atome zu Oligomeren verbrückt. Mit überschüssigem Me3SiNRR′ schreitet die Substitution des TiCl4 nur bis zur Grenzformel (RR′N)≤1,8TiCl≥2,2 fort. Ist R = C6H5, so besitzen die Reaktions-produkte nur angenähert die Zusammensetzung RR′NTiCl3. Die Reaktion von Me3SiNHC6H5 mit TiCl4 ergibt als einziges einheitliches Produkt TiCl4 · 2 C6H5NH2.
    Additional Material: 2 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 370 (1969), S. 275-282 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The cleavage of R2NSi(CH3)3 (R = CH3, C2H5) by TiBr4 yields R2NTiBr3. The compounds (R2N)2TiBr2 and (R2N3)TiBr were obtained by metathesis from TiBr4 and Ti(NR2)4. Properties, 1H-NMR and far-infrared spectra of all dimethylamino- and diethyl-amino titanium bromides are reported. Only the R2NTiBr3 derivatives associate frorming TiBrTi bridges.
    Notes: Die Spaltung von R2NSi(CH3)3 (R = CH3, C2H5) mit TiBr4 eignet sich zur Darstellung von R2NTiBr3, während (R2N)2TiBr2 und (R2N)3TiBr in guten Ausbeuten aus TiBr4 und Ti(NR2)4 erhalten wurden. Eigenschaften, 1H-KMR- und IR-Spektren 〈 700 cm-1 aller Dimethylamino- und Diäthylamino-titanbromide werden beschrieben. Stärkere Assoziation über TiBrTi-Brücken tritt nur bei den R2NTiBr3-Verbindungen auf.
    Additional Material: 4 Tab.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 319 (1963), S. 244-252 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A favourable process for synthesizing alkoxy disilazanes, [(RO)3Si]2NH, is based on the direct introduction of NH3 into a reaction mixture consisting of SiCl4 and the respective alcohols, followed by distillation of the reaction products (tetraalkoxy silanes, hexaalkoxy disilazanes, alkoxy poly- and cyclosilazanes) from the reaction vessel. This method is applicable to SiCl4, RSiCl3, RR′SiCl2 (R, R′ = CH3; CH2CH) as well as to alcohols containing the groups —CH2OH; 〉CHOH; —CH = CH—CH2OH. There is no difficulty to prepare kg-quantities in 30% to 50% yields.New disilazanes are described.
    Notes: Alkoxydisilazane lassen sich am günstigsten in einer Eintopfreaktion darstellen, indem man direkt in das Reaktionsgemisch aus Alkoholen und Siliciumtetrachlorid Ammoniak einleitet und die in ihren Siedepunkten weit auseinanderliegenden Produkte  -  Tetraalkoxysilane, Hexaalkoxydisilazane und Alkoxypoly- sowie Alkoxycyclosilazane  -  destilliert. Das Verfahren ist anwendbar bei primären, sekundären, substituierten und ungesättigten Alkoholen einerseits und Siliciumtetrachlorid, Mono- und Diorganochlorsilanen andererseits. Die Ausbeuten betragen 30-50%; es lassen sich ohne Schwierigkeit kg-Mengen an Disilazanen erzeugen. Die neu dargestellten Verbindungen sind mit ihren physikalischen Daten aus Tab. 3 zu ersehen.
    Additional Material: 6 Tab.
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