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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 218-233 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Donor/Acceptor Substituted Aromatic Systems, I. Dicarbonyl (η5 -cyclopentadienyl)(1,2,3-triphenylcyclopropenyl)ironDicarbonyl (η5 -cyclopentadienyl)(1,2,3-triphenylcyclopropenyl)iron (13), the structure of which has been determined by X-ray crystallography, is formed from triphenylcyclopropenylium tetra-fluoroborate or bromide and sodium dicarbonyl(cyclopentadienyl)ferrate. With bromine, iodine, tetrafluoroboric acid, trifluoroacetic acid, and triethyloxonium tetrafluoroborate 13 gives triphenylcyclopropenylium salts (12), with hydrogen halides 1,2-diphenylindene (23), with acyl chlorides in the presence of aluminium chloride 3-acyl-1,2-diphenylindenes (25), and with mercuric chlorides hexaphenylbicyclopropene 14. Irradiation of 13 leads to the (oxocyclobutenyl)iron complex 9e and triphenylcyclobutenone (28). Obviously, 13 does not display any properties of a cyclopropenyl anion.
    Notes: Dicarbonyl (η5 -cyclopentadienyl)1,2,3-triphenylcyclopropenyl)eisen (13), dessen Bindungsverhältnisse durch eine Röntgenstrukturanalyse gesichert wurden, entsteht aus Triphenylcyclo-propenylium-tetrafluoroborat oder -bromid und Natrium-dicarbonyl(cyclopentadienyl)ferrat. Mit Brom, Iod, Tetrafluoroborsäure, Trifluoressigsäure und Triethyloxonium-tetrafluoroborat entstehen aus 13 Triphenylcyclopropenylium-Salze (12), mit Halogenwasserstoffsäuren 1,2-Diphenylinden (23), mit Säurechloriden in Gegenwart von Aluminiumchlorid 3-Acyl-1,2-diphenylindene (25) und mit Quecksilberchlorid Hexaphenylbicyclopropen 14. Die UV-Bestrahlung von 13 ergibt einen (Oxocyclobutenyl)eisen-Komplex (9e) neben Triphenylcyclobutenon (28), Offensichtlich weist 13 keine Cyclopropenyl-Anion-Eigenschaften auf.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 1529-1534 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Donor/Acceptor-substituted Aromatic Systems, IV. 4,5,6-Trihalo-1,2,3-triazinesTetrachlora-and tetrabromocyclopropene react with trimethylsilyl azide to give 4,5,6-trichloro-(2) and 4,5,6-tribromo-1,2,3-triazine (5), respectively. Trihalotriazines are substituted by nucleophiles first at 4- then at 6-position. All chlorine atoms are substituted with sodium methanolate and sodium ethanethiolate.  - The reaction of 1,2-dichloro-3,3-difluoro-1-cyclopropene (6) with diisopropylamine yields 1-chloro-2-diisopropylamino-3,3-difluoro-1-cyclopropene (7).
    Notes: Tetrachlor- und Tetrabromcyclopropen reagieren mit Trimethylsilylazid zu 4,5,6-Trichlor- (2) bzw. 4,5,6-Tribrom-1,2,3-triazin (5). Die Trihalogentriazine werden von Nucleophilen zuerst in 4-, dann in 6-Position angegriffen. Der Austausch aller Chloratome gelingt mit Na-Methanolat und Na-Ethanthiolat.  -  1,2-Dichlor-3,3-difluor-1-cyclopropen (6)setzt sich mit Diisopropylamin zu 1-Chlor-2-diisopropylamino-3,3-difluor-1-cyclopropen (7) um.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 1535-1544 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Donor/Acceptor-substituted Aromatic Systems, V. Reactions of Amino- and Halo-1,2,3-triazinesProtonation of 1,2,3-triazines takes place primarily at N-2, only the tetrafluoroborate of 5-chloro-4,6-bis(dimethylamino)triazine being, however, isolable. Tris(diisopropylamino)-1,2,3-triazine reacts with HBF4 to give 5-diisopropylamino-4-[(diisopropylamino)methylene]-3-isopropyl-2,2-dimethyl-3,4-dihydro-2 H-imidazolium tertrafluoroborate (15).  -  Triazines and methyl iodide form 2-methyl-1,2,3-triazinium iodides; 5-chloro-4,6-bis(dimethylamino)-2-methyltriazinium iodide reacts with malononitrile to yield 4,6-bis(dimethylamino)-2-methyl-1,2,3-triazine-Δ5(2H),α-malononitrile (22). - Quaternary salts of 5-(dialkylamino)-1,2,3-triazines with methyl chloroformate and picryl chloride are hydrolyzed to methyl 4,6-bis(dialkylamino)-5-oxo-2,5-dihydro-1,2,3-triazine-2-carboxylate 27b and 4,6-bis (dialkylamino)-2-picryl-1,2,3-triazin-5(2H)-one (28).  -  From 5-(dialkylamino)-1,2,3-triazines and chlorobis(dialkylamino)cyclopropenylium perchlorates dication salts 24 are obtained, which are hydrolyzed to (5-oxo-2,5-dihydro-1,2,3-triazin-2-yl)-cycloperopenylium perchorates 25.
    Notes: Die Protonierung von 1,2,3-Triazinen erfolgt primär in 2-Position, jedoch ist nur beim 5-Chlor-4,6-bis(dimethylamino)-1,2,3-triazin das entsprechende Tetrafluoroborat isolierbar. Tris(diisopropylamino)-1,2,3-triazin reagiert mit HBF4 zum 5-Diisopropylamino-4-[(diisopropylamino)-methylen]-3-isopropyl-2,2-dimethyl-3,4-dihydro-2H-imidazolium-terafluoroborat (15).  -  Mit Methyliodid erhält man aus den Triazinen 2-Methyl-1,2,3-triazinium-iodide; das 5-Chlor-4,6-bis(dimethylamino)-2-methyltriazinium-iodid setzt sich mit Malononitril zu-4,6-Bis(dimethylamino)-2-methyl-1,2,3-triazin-Δ5(2H),α-malononitril (22) um.  -  Die aus 5-(Dialkylamino)-1,2,3-triazinen mit Chlorameisensäure-methylester und Picrylchlorid erhaltenen Triaziniumsalze lassen sich zu 4,6-Bis (dialkylamino)-5-oxo-2,5-dihydro-1,2,3-triazin-2-carbonsäure-methylester 27b bzw. 4,6-Bis (dialkylamino)-2-picryl-1,2,3-triazin-5(2H)-on (28) hydrolysieren.  -  Aus 5-Dialkylamino-1,2,3-triazinen und Chlorbis(dialkylamino)cyclopropenylium-perchoraten entstehen Dikationsalze 24, deren Hydrolyse (5-Oxo-2,5-dihydro-1,2,3-triazin-2-yl)cyclopropenylium-perchlorate 25 ergibt.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 1514-1528 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Donor/Acceptor-substituted Aromatic Systems, III. Amino-1,2,3-triazines - precursors for AzacyclobutadienesTris-and bis(dialkylamino)cyclopropenylium perchlorates react with potassium azide in methanol to give cyclopropenylium azides, which rearrange to 1,2,3-triazines upon heating in toluene. (Dialkylamino)cyclopropenylium perchlorates yield triazines with potassium azide even at room temperature. 1,2,3-Triazines prepared in that way carry one amino group in 5-position; in case of two or three amino groups, the biggest one occupies the 5-position.  - Tris (dimethylamino)-cyclopropenylium perchlorate (38) reacts with ethyl silverdiazoacetate to give ethyl 4,5,6-tris(dimethylamino)-3-pyridazinecarboxylate (40).  - 3-[2,3-Bis(diisopropylamino)-2-cyclopropen-1-ylidene]-1-triazene carbonitrile is formed from the reaction of chlorobis(diisopropylamino)cyclopropenylium perchlorate (12b) with potassium azide.
    Notes: Tris-und Bis(dialkylamino)cyclopropenylium-perchlorate reagieren mit Kaliumazid in Methanol zu den entsprechenden Cyclopropenylium-aziden, die beim Erhitzen in Toluol in 1,2,3-Triazine übergehen. (Dialkylamino)cyclopropenylium-perchlorate liefern mit Kaliumazid schon bei Raumtemperatur direkt die Triazine. Alle so gewonnenen Triazine tragen eine Aminogruppe in 5-Position; sind 2 oder 3 Aminogruppen vorhanden, besetzt die sterisch anspruchsvollste die 5-Position.  -  Tris(dimethylamino)cyclopropenylium-perchlorat (38) reagiert mit Silberdiazoessigsäure-ethylester zum 4,5,6-Tris(dimethylamino)-3-pyridazincarbonsäure-ethylester (40).  -  Chlorbis(diisopropylamino)cyclopropenylium-perchlorat (12b) ergibt bei der Umsetzung mit Kaliumazid 3-[2,3-Bis(diisopropylamino)-2-cyclopropen-1-yliden]-1-triazencarbonitril (28).
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1979 (1979), S. 1406-1425 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cycloadditions with Dipolar Intermediates, II. - Dipolar Products from AllenecarboxylatesThe allenecarboxylates 2c-c, and in some cases also the allenetri- and allenedicarboxylates 2d and 2e, f react with phosphanes, pyridines, and nucleophilic carbenes or their precursors to give the dipolar 1:1 adducts 10, 11 and 16,18, 20, respectively. These “carbene allene dipoles” represent stable derivatives of trimethylenemethane.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 0044-8249
    Keywords: 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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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 87 (1975), S. 711-712 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 90 (1978), S. 808-810 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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