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
  • Chemistry  (30)
  • Fluoro(organyl)phosphanes  (1)
  • Halomethylphosphonium Halides  (1)
  • Organylfluorophosphanes  (1)
  • Methanediphosphonic Acid Derivatives
  • 1990-1994  (14)
  • 1985-1989  (16)
Collection
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 531 (1985), S. 73-81 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of the Two-component Systems P(OR)3 - x(NR2)x (x = 0-3)/CCl4 and P4/CCl4 with HF-DonatorsThe combination of organylammonium fluorides and carbon tetrachloride is a good agent for oxidative fluorination of trivalent phosphorus compounds. As oxidation products [(RO)PF5]- and (RO)2P(O)F are obtained from P(OR)3, (Et2N)2P(O)F and (Et2N)2(EtO)PF2 from P(OEt)(NEt2)2 as well as (Et2N)3PF2 and [(Et2N)3PF]+ from P(NEt2)3. In the system R2NH/CCl4/Et3N · n HF P4 is fast oxidized forming [HPF5]-, R2NH · PF5 and (R2N)2P(O)F. In the case of simultaneous addition of alcohols [(RO)PF5]-, (RO)3PO and (R2N)2P(O)F are formed. The reactions are controlled by the nucleophilic power and the concentration of fluoride, the acidity of the system, and the temperature.
    Notes: Die Kombination von Organylammoniumfluoriden mit Tetrachlorkohlenstoff stellt ein gutes Agens zur oxydativen Fluorierung von trivalenten Phosphorverbindungen dar. Aus P(OR)3 werden als Oxydationsprodukte [(RO)PF5]- und (RO)2P(O)F, aus P(OEt)(NEt2)2 (Et2N)2P(O)F und (Et2N)2(EtO)PF2 und aus P(NEt2)3 (Et2N)3PF2 und [(Et2N)3PF]+ erhalten. P4 wird im System R2NH/CCl4/Et3N · n HF in kurzer Zeit zu [HPF5]-, R2NH · PF5 und (R2N)2P(O)F abgebaut. Bei gleichzeitigem Alkoholzusatz entstehen [(RO)PF5]-, (RO)3PO und (R2N)2P(O)F. Die Reaktionen sind über die Nukleophilie und Konzentration der Fluoridionen, die Acidität der Systeme und die Temperatur steuerbar.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 530 (1985), S. 207-212 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Properties of Pentafluorophosphates, YPF5- (Y = OR, NHAr), and PF5-Amine Adducts, PF5 · NHR2In the presence of secondary amines instead of hexafluorophosphates, PF6-, PF5-amine adducts, PF5 · NHR2, are obtained by the reaction of PCl5 with alkylammonium fluorides in acetonitrile.The additional presence of alcohols or phenol leads to the formation of alkoxy- or aroxypentafluorophosphates, ROPF5-. The PF5-amine adducts can be converted into ROPF5- or arylimidopentafluorophosphates, ArNHPF5-, resp., by treating with alcohols or aryl amines, resp.
    Notes: Bei der Umsetzung von PCl5 mit Alkylammoniumfluoriden in Acetonitril werden in Gegenwart sec. Amine anstelle von Hexafluorophosphaten, PF6-, PF5-Amin-Addukte, PF5 · HNR2, und bei zusätzlicher Anwesenheit von Alkoholen bzw. Phenol, Alkoxy- bzw. Aroxypentafluorophosphate, ROPF5-, erhalten. Die PF5-Amin-Addukte setzen sich mit Alkoholen oder Arylaminen zu ROPF5- bzw. Arylimidopentafluorophosphaten, ArNHPF5-, um.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 523 (1985), S. 180-186 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of the Two-component System Trialkylphosphite/Carbon Tetrachloride with Nucleophiles Containing Hydrogen. 2. Reaction with Ammonia and AminesAmmonia and primary amines react with the two-component system trialkylphosphite/carbon tetrachloride yielding diester-amides of phosphoric acid, (RO)2P(O)NHR′. If an excess of amine is used compounds of the type ROP(O)(NHR′)2 and OP(NHR′)3 are formed too. By the reaction of (RO)3P/CCl4 in presence of secondary and tertiary amines the first reaction product is (RO)2P(O)CCl3 which yields with the amine [NRR′R″R″′]+[Cl3CP(OR)O2]-; (R = Et, Bu).
    Notes: Ammoniak und primäre Amine reagieren mit dem Zweikomponenten-system Trialkylphosphit/Tetrachlokohlenstoff zu Diesteramiden der Phosphorsäure, (RO)2P(O)NHR′. Bei Aminüberschuß werden auch Verbindungen des Typs ROP(O)(NHR′)2 und OP(NHR′)3 gebildet. Bei der Reaktion von (RO)3P/CCl4 in Gegenwart sekundärer und tertiärer Amine entsteht zunächst (RO)2 P(O)CCl3, das mit dem Amin zu [NRR′R″R′]+[Cl3CP(OR)O2]- reagiert; (R = Et, Bu).
    Additional Material: 2 Tab.
    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 539 (1986), S. 187-190 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of N-Alkyl-bis(difluorophosphoryl)amides, RN(POF2)2, with Silylated Nucleophiles and Et2NSF3N-Alkyl-bis(difluorophosphoryl)amides, RN(POF2)2 (R = Me, Et), react in any case with silylated nucleophiles such as Me3SiOMe and Me3SiNEt2 under cleavage of the PNP bridge forming derivatives of di- and monofluorophosphoric acid. In their reaction with Et2NSF3 (RNPF3)2 and OPF3 or PF5, resp., are obtained. The compounds F2P(O)—NR—PF4 and RN(PF4)2 postulated as intermediates are not stable.
    Notes: N-Alkyl-bis(difluorophosphoryl)amide, RN(POF2)2 (R = Me, Et), reagieren mit den silylierten Nukleophilen Me3SiOMe und Me3SiNEt2 in jedem Fall unter Spaltung der PNP-Brücke zu Di- und Monofluorophosphorsäurederivaten. Bei der Reaktion mit Et2NSF3 werden OPF3 bzw. PF5 und (RNPF3)2 erhalten. Die als Zwischenprodukte angenommenen Verbindungen F2P(O)—NR—PF4 und RN(PF4)2 sind nicht stabil.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 539 (1986), S. 183-186 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigations on the Oxidation of N-Alkyl-bis(difluoro-phosphorus(III))amidesOxidation of RN(PF2)2 by N2O4 in n-hexane leads to bis(difluorophosphoryl)amides, RN(POF2)2 (R = Me, Et), in good yields. Only one phosphorus atom is oxidized by phenylazide resulting in the formation of 1.3-diphenyl-2.4-bis(difluorophosphorus(III)-N-alkyl-amido)-2.2.4.4-tetrafluoro-diaza-λ5,λ5 diphosphetidines, [F2P—N(R)—PF2NPh]2.
    Notes: Die Oxydation von RN(PF2)2 mit N2O4 in n-Hexan führt in guten Ausbeuten zu den Bis(difluorophosphoryl)-amiden RN(POF2)2 (R = Me, Et). Mit Phenylazid wird nur ein Phosphoratom oxydiert und es werden 1,3-Diphenyl-2,4-bis(difluorophosphor(III)-N-alkylamido)-2,2,4,4-tetrafluoro-diaza-λ5,λ5-diphosphetidine, [F2P—N(R)—PF2NPh]2, erhalten.
    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 563 (1988), S. 167-172 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tetraphenyl Imidodiphosphate as Ligand in Fluoro Complexes. 1. Fluoro Complexes of TitaniumIn acetonitrile TiF4 reacts with tetraphenyl imidodiphosphate forming two tetrafluoro (I, II) and three trifluoro complexes (III, IV, V) as well as one difluorotitanium complex (VI). The difluoro complex VI is exclusively formed by sing an excess of the ligand. VI was isolated and analytically characterized. The constitution and configuration of the complexes are concluded from 19F and 31P n.m.r. data. The tetraphenyl imidodiphosphate is only bidentately bonded, i.e. as chelate or bridging ligand; in the substitution complexes III-VI it is coordinated as anion.
    Notes: TiF4 bildet mit Imidodiphosphorsäuretetraphenylester in CH3CN zwei Tetrafluoro- (I, II) und drei Trifluorokomplexe (III, IV, V) sowie einen Difluorotitan-Komplex (VI). Mit Ligandenüberschuß entsteht ausschließlich der Difluorokomplex, der isoliert und elementar-analytisch charakterisiert wurde. Die Konstitutions- und Konfigurationsaussagen zu den übrigen Komplexen basieren auf 19F- und 31P-NMR-Untersuchungen. Der Imidodiphosphorsäureestr ist in den Komplexen stets zweizähnig als Chelat- oder Brückenligand gebunden; in den Substitutions-komplexen III-VI ist er in seiner anionischen Form enthalten.
    Additional Material: 1 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 589 (1990), S. 235-239 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Studies on the Absorption of SiF4 at Silica PowdersThe absorption of SiF4 at silica powder was investigated in dependence on temperature and pressure. It starts at about 800 K. In the range of 800 K up to 1160 K the amount of SiF4 absorbed within 24 hours increases with temperature, and at a constant temperature (880 K) with the filling pressure of SiF4 (2 kPa-30 kPa). Desorption of SiF4 was proved experimentally at temperature above 1273 K. It is connected with crystallization of silica into β-cristobalite.
    Notes: Es wurde die Druck- und Temperaturabhängigkeit der Sorption von SiF4 an Kieselglaspulvern untersucht. Die Sorption setzt bei etwa 800 K ein. Von 800 K bis 1160 K nimmt der in 24 Stunden absorbierte SiF4-Anteil mit der Temperatur zu. Bei konstanter Temperatur (880 K) wächst die absorbierte Menge mit dem Ausgangsdruck (2 kPa - 30 kPa). Die Desorption ist bei Temperaturen ≥ 1273 K experimentell nachweisbar und mit der Kristallisation des Kieselglaspulvers zu β-Cristobalit verbunden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of Diphenylfluorophosphane with Aldehydes. Crystal Structure of [α-(Difluorodiphenyl-λ5-phosphanyl)] Piperonyl DiphenylphosphiniteDiphenylfluorophosphane, Ph2PF, reacts with aldehydes forming phosphinito phosphoranes, Ph2F2P—CHR—O—PPh2. [α-(Difluorodiphenyl-λ5-phosphanyl)] piperonyl diphenyl-phosphinite, obtained by the reaction of Ph2PF with piperonal, crystallizes in the triclinic space group P1 with a = 969.3 pm, b = 2360 pm, c = 607,3 pm, α = 88.33°, β = 102.79°, γ = 92.40° and Z = 2.
    Notes: Diphenylfluorphosphan, Ph2PF, reagiert mit Aldehyden unter Bildung von Phosphinitophosphoranen, Ph2F2P—CHR—O—PPh2. Der mit Piperonal erhaltene Diphenyl-phosphinigsäure-[α-(difluorodiphenyl-λ5-phosphanyl)]piperonylestr kristallisiert in der triklinen Raumgruppe P1 mit a = 969,3 pm, b = 2360 pm, c = 607,3 pm, α = 88,33°, β = 102,79°, γ = 92,40° und Z = 2.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 590 (1990), S. 120-126 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Oxidative Derivatization of 1,3,2-Dioxaphosphorinanes Using Carbon Tetrachloride as Oxidant2-Alkoxy- and 2-dialkylamido-1,3,2-dioxaphosphorinanes react with CCl4 in presence or absence of protic nucleophiles under ring opening forming acyclic derivatives of phosphates. 2-Anilido-1,3,2-dioxaphosphorinane, however, forms 2-amido-2-phenylimido-1,3,2-dioxaphosphorinanes (6) retaining the heterocyclic ring system. The latter are also obtained in the reaction of 2-dialkylamido-1,3,2-dioxaphosphorinanes with CCl4 and aniline. 2-Amino-2-oxo-1,3,2-dioxaphosphorinanes (8) are prepared from 2-hydrido-2-oxo-1,3,2-dioxaphosphorinane (7) by means of the Atherton-Todd reaction. In combination with the Staudinger reaction the latter yields N(2-oxo-1,3,2-dioxaphosphorinanyl)phosphazenes (10).
    Notes: 2-Alkoxy- und 2-Dialkylamido-1,3,2-dioxaphosphorinane reagieren mit CCl4 bei An- und Abwesenheit protischer Nucleophile unter Ringöffnung zu acyclischen Phosphorsäureesterderivaten. 2-Anilido-1,3,2-dioxaphosphorinan wird dagegen unter Erhalt des heterocyclischen Ringsystems in 2-Amido-2-phenylimido-1,3,2-dioxaphosphorinane (6) überführt. Letztere werden auch bei der Umsetzung von 2-Dialkylamido-1,3,2-dioxaphosphorinane mit CCl4 und Anilin erhalten. Aus 2-Hydrido-2-oxo-1,3,2-dioxaphosphorinan (7) sind mit Hilfe der Atherton-Todd-Reaktion 2-Amido-2-oxo-1,3,2-dioxaphosphorinane (8) und in Kombination mit der Staudinger-Reaktion N-(2-Oxo-1,3,2-dioxaphosphorinanyl)phosphazene (10) darstellbar.
    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 615 (1992), S. 66-72 
    ISSN: 0044-2313
    Keywords: Fluoridolysis ; oxidative fluorination ; fluorophosphates ; fluorophospholanes ; fluorospirophosphoranes ; triethylamin-HF-adducts ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Fluorination of Dioxa- and OxazaphospholanesThe fluoridolysis of cyclic esters and esteramides of phosphorous acid (1, 2, 4, 5, 7, 11, and 12,) using the acid fluorination reagent Et3N · nHF (n 〉 1) or an excess of a basic composed agent (n 〈 1) yields in all cases HPF5- (3,). With stoichiometric amounts of fluoride, however, the fluorophospholanes (4,) and (5,) as well as fac.- and mer.-o- (6a, 6b,) and the spirocyclic fluorohydridophosphate (8,) are obtained. (13,) reacts to (14,) and the spirocyclic compound (15,) gives (16,). The fluorophosphoranes (18,), (19,), and (21,) are obtained by oxidative fluorination of the spiro- or bicyclic P—H compounds 11, 12, and 20, with CCl4/Et3N · nHF (n 〈 1). The oxidative fluorination of the cyclic triesters of phosphorous acid 7, and 23, leads to the cyclic fluorophosphates (22,) and 16, as well as 6., The compounds 18, 19, and 22, are also formed by oxidative fluorination of elemental phosphorus, P4, in the presence of the corresponding bifunctional nucleophile.
    Notes: Die Fluoridolyse cyclischer Ester und Esteramide der phosphorigen Säure (1, 2, 4, 5, 7, 11, und 12,) mit dem sauren Fluorierungsagens Et3N · nHF (n 〉 1) ergibt ebenso wie mit überschüssigem basischen Fluorierungsmittel (n 〈 1) in allen Fällen HPF5- (3). Mit stöchiometrischen Mengen Fluorid werden dagegen die Fluorphospholane (4,) und (5,) sowie fac.- und mer.-o- (6a, 6b,) und das spirocyclische Fluorohydridophosphat (8,) erhalten. (13,) reagiert zu (14,) und die Spiroverbindung (15,) ergibt (16,). Durch oxidative Fluorierung mit der Reagenzkombination · nHF (n 〈 1) werden aus den spiro- bzw. bicyclischen P—H-Verbindungen 11, 12, und 20, die Fluorphosphorane (18,), (19,) und (21) erhalten. Die oxidative Fluorierung cyclischer Triester der phosphorigen Säure (7, 23,) führt zu den cyclischen Fluorophosphaten (22,) und 16, sowie 6., Die Verbindungen 18, 19, und 22, entstehen auch bei der oxidativen Fluorierung von P4 in Gegenwart des entsprechenden bifunktionellen Nucleophils.
    Additional Material: 4 Tab.
    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...