GLORIA

GEOMAR Library Ocean Research Information Access

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
    Electronic Resource
    Electronic Resource
    Bis[platinum(II)] and Bis[palladium(II)] Complexes of .alpha.,.omega.-Dicarboxylic Acid Bis(1,2,4-triaminobutane-N4) Amides (1995)
    s.l. : American Chemical Society
    Inorganic chemistry 34 (1995), S. 2316-2322 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00113a011
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    4,6-Diamino-1,3,5-triaza-2-phosphapentalene (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 3213-3226 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 4,6-Diamino-1,3,5-triaza-2-phosphapentalenesThe title compounds 5 are formed easily from the 4,6-dicyano-1,3,2-diazaphosphole derivatives 7-9 and dialkylamines. MNDO calculations, NMR and electron spectra as well as an X-ray structure investigation (5b) consistently show their pentalene π-system to divide extensively into a positively charged 2-azaallyl and a negatively charged 1,3,2-diazaphospholyl part. This is caused on the one hand by the 4,6-amino substituents and on the other hand by N-1,3 as well as by P-2. 5 is methylated in 1-position.
    Notes: Die Titelverbindungen 5 bilden sich leicht aus den 4,5-Dicyan-1,3,2-diazaphosphol-Derivaten 7-9 und Dialkylaminen. MNDO-Rechnungen, NMR- und Elektronenspektren sowie eine Röntgen-Strukturuntersuchung (5b) zeigen übereinstimmend eine weitgehende Aufgliederung des Pentalen-π-Systems in einen positiv geladenen 2-Azaallyl- und einen negativ geladenen 1,3,2-Diazaphospholyl-Teil. Dazu tragen einerseits die 4,6-Aminosubstituenten und andererseits sowohl N-1,3 wie auch P-2 bei. 5 läßt sich in 1-Stellung methylieren.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861191103
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    O/NMe2 exchange in the reaction of 4-benzylidene-5-oxazolones with phosphorous tris(dimethylamide) (1988)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 2067-2069 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 4-Benzylidene-5-oxazolones 5 do not react with P(OMe)3; with P(NMe2)3 they give rise to 4-α-[bis(dimethylamino)phosphoryl]benzyl-5-dimethylaminooxazoles 6. This behavior differs from that of the corresponding pyrazolones and isoxazolones and is attributed to a decreased stability of the dipolar adduct resulting from a β attack of phosphorus.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19881211128
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    2-Phosphaindolizines (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 475-480 
    Details
    ISSN: 0009-2940
    Keywords: 1,3-Azaphosphole, annulation to pyridine ; 2-Phosphaindolizines ; Pyridinium bromides, 1,2-dialkyl ; Phosphorus(III) chloride, condensation with CH2 groups ; Calculations, MNDO ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240309
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    1,4,2-Diazaphospholothiazoles and -pyridines by a Hantzsch-Type Condensation Using Chloromethyldichlorophosphane (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 581-587 
    Details
    ISSN: 0009-2940
    Keywords: Anellated azaphospholes ; Hantzsch-type [3 + 2] cyclocondensation ; Chloromethyldichlorophosphane ; Regioselectivity ; 31P-, 1H-, 13C-NMR spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The [3 + 2] cyclocondensation of 2-amino-1,3-thiazoline, 2-aminopyridines, 2- and 4-aminopyrimidines, 2-aminopyrazine, and 2-aminoquinoline with chloromethyldichlorophosphane in the presence of triethylamine yields regiospecifically 5,6-dihydrothiazolo[2,3-e][1,4,2]diazaphosphole (3), 1,4,2-diazaphospholo[4,5-α]pyridines (12), 1,4,2-diazaphospholo[4,5-α]pyrimidines (15), 1,4,2-diazaphospholo[4,5-e]pyrimidine (17), 1,4,2-diazaphospholo[4,5-α]pyrazine (19), and [1,4,2]diazaphospholo[4,5-α]quinoline (22), respectively. Using 2-amino-1,3-thiazole (4) and 2-aminobenzothiazoles 8, we obtained mixtures of the 1,5- and 4,5-anellated 1,4,2-diazaphospholes 5/6, 9a/10a and 9b/10b, while in the case of the methyl derivative 8c only the [1,4,2]diazaphospholo[5,4-b][1,3]benzothiazole 10c was formed. In the reaction of 2-aminothiazole and 2-aminopyrazine with Chloromethyldichlorophosphane the bis(diazaphospholo)-substituted chloromethylphosphanes 7 and 20 could be detected. The new anellated 1,4,2-diazaphospholes are colorless to pale yellow crystalline moisture-sensitive solids.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280610
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Ylidylphosphorsulfide, -selenide, -disulfide, -sulfidselenide und -diselenide (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 1207-1219 
    Details
    ISSN: 0009-2940
    Keywords: Ylide-substituted phosphorus ; Phosphorus sulfides ; Phosphorus selenides ; Thioxophosphanes ; Selenoxo-phosphanes ; Dithioxophosphoranes ; Diselenoxophosphoranes ; Alkylation reactions ; Selenadiphosphirane ; 2,5,7-Triselena-1,3,4,6-tetraphosphanorbornane ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ylidylphosphorus Sulfides, Selenides, Disulfides, Sulfide Selenides, and DiselenidesWe report on the first stable monomeric phosphorus mono-chalcogenides 2, 8 and the first stable dichalcogenides 4, 10 without bulky or intramolecularly coordinating substituents. They are stabilized by a high contribution of the zwitterionic resonance formula, which follows both from the NMR spectra and from an X-ray structure determination. Their preparation starts from triphenylphosphoniumylidyl-dichlorophosphanes 1. For the monochalcogenides they are treated with sodium sulfide or selenide or better with bis(trimethylsilyl) sulfide or selenide. In case of the C-phenyl and C-meta-tolyl representatives and also of the C-trimethylsilyl compound a number of secondary, partly novel products are obtained. - The dichalcogenides result from the reaction with sodium disulfide and diselenide, respectively, or from the oxidation of the monochalcogenides. - Alkylation of the monochalcogenides results in ylidylalkylchalcogenophosphenium salts 13, 15. In solution they are in equilibrium with more or less of the covalent form 14, 16, depending on the anion and on the solvent. Alkylation is often accompanied by secondary reactions. A diselenide loses selenium on alkylation.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951281212
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Bildung und Charakterisierung des Dinatrium-tetraphosphendiids (tBu3Si)NaP-P=P-PNa(SitBu3) und seines Dimeren (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 135-140 
    Details
    ISSN: 0009-2940
    Keywords: Synthesis ; Phosphorus ; Supersilyloligophosphides ; Crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reaction of P4 in THF or DME with 2 R*Na (R* = SitBu3) at -78°C leads quantitatively to deep red THF or DME adducts of R*NaP-P=P-PNaR* (3). According to 31P NMR, the P4 skeleton 3 is cis-configurated. On the other hand, reaction of P4 in TBME with 2 R*Na at -78°C leads quantitatively to (R*NaP)4 (4), a [2+2] cycloadduct of 3, the Na4P8 skeleton of which according to X-ray structure analysis forms a double cube with four P atoms in the second layer and two P and two Na atoms in alternating positions in the first and in the third layer (the Na atoms are coordinated with donors). By resolving the THF adduct 3 in TBME (the TBME adduct of 4 in THF) the compound 4 (the compound 3) is rapidly formed under reversal of the P-P=P-P configuration by way of [2+2] cycloaddition (by way of [2+2] cycloreversion). 3 and 4 are sensitive to oxidation and to protolysis. With TCNE, 3 is oxidized to R*2P4 (bicyclic P4 skeleton), with CF3SO3H, 3 may be transformed into R*3P5Na2 X 4 THF or in (R*P3)3 and R*PH2.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971300123
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    1λ5,3λ5-Diphosphol-Derivate aus Bis(diphenylphosphino)methan und Propargylbromiden (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 67-71 
    Details
    ISSN: 0009-2940
    Keywords: Propargylphosphonium ions ; CC-Proton shifts ; 1,3-Diphosphole derivatives, cationic ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1λ5,3λ5-Diphosphole Derivatives from Bis(diphenylphosphino)methane and Propargyl BromidesThe two title reagents 2 and 3 form a five-membered 1,3-diphosphole ring by nucleophilic interaction of the two phosphino groups of 2 with the methylene carbon atom and the adjacent acetylenic carbon atom of 3. (Phosphinomethyl)propargylphosphonium, diphosphafulvenium and diphospholium bromides (4, 6, and 1) result and can be isolated from consecutive steps of this reaction. By hydrolysis the diphospholium rings of 1 and 6 are selectively opened at the PCP unit to yield four different isomeric (phosphinoylpropenyl)phosphonium bromides 8 - 11.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921250112
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Vier- und fünfgliedrige Phosphorheterocyclen, 69. 1,3,2-Diaza-/1,2-Azaphosphol-Umwandlung mit Acetylenen (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 410-419 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Four- and Five-membered Phosphorus Heterocycles, 69. 1,3,2-Diaza- to 1,2-Azaphosphole Conversion by AcetylenesThe still missing most simple azaphosphole representatives, the 1H-1,2-azaphospholes (7, 8) become available by the regioselective addition of various acetylenes to 1,3,2-diazaphosphole-4,5-dicarbonitriles (3, 4). The results are elucidated by means of a detailed and comparative discussion of the 31P, 13C, and 1H NMR spectra. The new 1,2-azaphospholes are remarkably insensitive against hydrolysis and oxidation.
    Notes: Die bislang noch fehlenden einfachsten Vertreter der Azaphosphole, die 1H-1,2-Azaphosphole (7, 8) werden durch die regioselektive Addition unterschiedlicher Acetylene an 1,3,2-Diazaphosphol-4,5-dicarbonitrile (3, 4) zugänglich. Die Ergebnisse werden durch eine detaillierte vergleichende Diskussion der 31P-, 13C- und 1H-NMR-Spektren abgesichert. Die neuen 1,2-Azaphosphole sind bemerkenswert unempfindlich gegen Hydrolyse und Oxidation.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190204
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Ylidyl-dihalogenphosphane - Strukturbilder einer sich anbahnenden Dissoziation (1995)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 128 (1995), S. 379-393 
    Details
    ISSN: 0009-2940
    Keywords: Ylides, dichloro- and dibromophosphanyl- ; Enamines, dichlorophosphanyl- ; Phosphonium ions, chlorophosphaalkenyl- ; Stereoelectronic (anomeric) effect and anionic hyperconjugation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ylidyl-dihalophosphanes Provide Structural Snapshots on Their Way to DissociationThe reaction of phosphonium ylides with phosphorus trihalides has been studied for the synthesis of ylidyl-dihalophos-phanes (= dihalophosphanyl ylides) Ph3P=CR—PX2 3, X = Cl, and 9, X = Br. Compounds 3, R = aryl, are readily prepared from the phosphonium bromides [Ph3P—CH2R]Br, compounds 3, R = alkyl, SiMe3 or PCl2, and 9 are obtained from silylylides Ph3P=CR—SiMe3, compound 3, R = PPh3+ results from the addition of PCl3 to the hexaphenylcarbodiphosphorane. A (β-morpholinovinyl)dichlorophosphane 12 has also been prepared. Ylides 3 are oxidized by sulfur and selenium and are converted to ylidyl-chlorophosphenium (= chloro-phosphaalkenyl-phosphonium) salts [Ph3P—CR=PCl]AlCl4 10. In the 31P-NMR spectra of 3 and 9 the geminal coupling 2JPP indicates the phosphorus lone pair to be synperiplanar to the phosphonio group. In one case the P(III)—C rotation barrier has been estimated from VT-31P-NMR spectra. By X-ray crystallography the structures of 3, R = Me, 2,6-Cl2C6H4, 4-NO2C6H5, PCl2, of 9, R = Me (two molecules), SiMe3, of an ylidyl-selenophosphonyl dichloride (11b), and of 12 have been analyzed. They provide representatives for the full range of rotation from the symmetric conformer with two equal P—X bonds to the conformer with one P—X bond perpendicular to the PCP plane and with this bond being extremely elongated. Thus, they map out the pathway to P—X bond breaking. On this way the initial charge transfer from the ylidic carbon to the antibonding P—X orbital ends up in a π donation and P—X dissociation.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19951280410
    Location Call Number Limitation 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...