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  • 11
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 207-212 
    ISSN: 0044-2313
    Keywords: 3,5,7-Trilithiumoxido-tricyclo[2.2.1.02,6]heptaphosphane ; 5-Hydrogen-3,7-dilithiumoxido-tricyclo[2.2.1.02,6]heptaphosphane ; Trilithium Heptaphosphide ; Lithium Pentaphosphacyclopentadienide ; Heptaphosphanortricyclenes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 233. Li3P7O3 and Li2HP7O2 - the First Oxido Heptaphosphanes(3)The novel oxido heptaphosphanes(3) Li3P7O3 (1) and Li2HP7O2 (2) have been obtained by the reaction of trilithium heptaphosphide with cumene hydroperoxide. The compounds 1 and 2 are also formed from lithium pentaphosphacyclopentadienide and cumene hydroperoxide. They are sensitive to oxidation and are pale yellow solids whose structures have been elucidated by means of NMR and IR spectroscopic investigations. In each case, the oxygen atoms are bonded as lithiumoxido groups exocyclically to the heptaphosphanortricyclene skeleton.
    Notes: Die Reaktion von Trilithium-heptaphosphid mit Cumolhydroperoxid führt unter geeigneten Bedingungen zu den neuen Oxido-heptaphosphanen(3) Li3P7O3 (1) und Li2HP7O2 (2). Die Verbindungen 1 und 2 werden auch aus Lithium-pentaphosphacyclopentadienid und Cumolhydroperoxid gebildet. Es sind oxydationsempfindliche, blaßgelbe Feststoffe, deren Struktur durch NMR- und IR-spektroskopische Untersuchungen ermittelt wurde. Die Sauerstoffatome sind jeweils exocyclisch als Lithiumoxido-Gruppen an das Heptaphosphanortricyclen-Gerüst gebunden.
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  • 12
    ISSN: 0044-2313
    Keywords: Diphosphane(4) ; Diborane(6) ; Borane-tetrahydrofuran ; Diphosphane-borane ; Diphosphane-1,2-bis(borane) ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 239. On the Reaction of Diphosphane(4) with Diborane(6) and with THF-Borane: Formation of Diphosphane-borane, P2H4 · BH3, and Diphosphane-1,2-bis(borane), BH3 · P2H4 · BH3Diphosphane(4) always reacts with diborane(6) in the temperature range of -118 to -78°C, to furnish a mixture of diphosphane-borane, P2H4 · BH3 (1), and diphosphane-1,2-bis(borane), BH3 · P2H4 · BH3 (2), in addition to small amounts of triphosphane-1,3-bis(borane), BH3 · P3H5 · BH3, and phosphane-borane, BH3 · PH3, irrespective of the molar ratios of the reactants employed. The formation of the 1 : 1 adduct P2H4 · B2H6 reported in the literature [4] could not be confirmed. The structures of compounds 1 and 2 were investigated by nuclear magnetic resonance spectroscopy which revealed the complete, homolytic cleavage of diborane(6). As a result of the bonding of one BH3 group to diphosphane(4), the Lewis basicity of the other PH2 group is markedly reduced. Similar mixtures of products are obtained when the borane adduct THF · BH3 is employed in an analogous reaction. In the case of a 1 : 1 molar ratio of P2H4 : THF · BH3 at -78°C, the reaction furnishes compound 1 exclusively. This product can be isolated in the pure state and is found to be appreciably more stable than diphosphane(4).
    Notes: Diphosphan(4) reagiert mit Diboran(6) im Temperaturbereich von -118 bis -78°C bei unterschiedlichen Reaktandenverhältnissen stets zu einem Gemisch aus Diphosphan-boran, P2H4 · BH3 (1), und Diphosphan-1,2-bis(boran), BH3 · P2H4 · BH3 (2), mit etwas Triphosphan-1,3-bis(boran), BH3 · P3H5 · BH3, und Phosphan-boran, BH3 · PH3. Die Bildung des in der Literatur beschriebenen 1 : 1-Adduktes P2H4 · B2H6 [4] konnte nicht bestätigt werden. Nach kernresonanzspektroskopischen Strukturuntersuchungen der Verbindungen 1 und 2 findet eine vollständige homolytische Spaltung von Diboran(6) statt. Durch die Bindung einer BH3-Gruppe an Diphosphan(4) wird die Lewis-Basizität der anderen PH2-Gruppe deutlich herabgesetzt. Mit dem Boran-Addukt THF · BH3 entstehen ähnliche Produktgemische. Bei Reaktion im Molverhältnis P2H4 : THF · BH3 = 1 : 1 (-78°C) wird ausschließlich Verbindung 1 gebildet, die rein isolierbar und merklich beständiger als Diphosphan(4) ist.
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  • 13
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 589 (1990), S. 39-50 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 207. Degradation of the Silaphosphacubane (t-BuSiP)4 with Hydrogen Chloride to the Tetraphosphatetrasilabicyclo[2.2.2]octane (t-BuSiP)4H3Cl3The reaction of the silaphosphacubane (t-BuSiP)4 (1) with hydrogen chloride (molar ratio 1:3) yields the compound (t-BuSiP)4H3Cl3 (4), which has been isolated in pure form. According to NMR spectroscopic investigations, 4 is 2,4,6,7-tetra-tert-butyl-2,6,7-trichloro-3,5,8-trihydrogen-1,3,5,8-tetraphospha-2,4,6,7-tetrasilabicyclo[2.2.2]octane and thus the first silaphosphane with a skeleton consisting of three annellated Si3P3 six-membered rings. Compound 4 exists as a mixture of four diastereomers, which are in equilibrium by inversion of the H-substituted P atoms. In the reaction of 4 with DBU (molar ratio 1:3) the silaphosphacubane 1, reobtained.
    Notes: Bei der Reaktion des Silaphosphacubans (t-BuSiP)4 (1) mit Chlorwasserstoff (Molverhältnis 1:3) entsteht die Verbindung (t-BuSiP)4H3Cl3 (4), die in reiner Form isoliert werden konnte. Nach kernresonanzspektroskopischen Untersuchungen handelt es sich um 2,4,6,7-Tetra-tert-butyl-2,6,7-trichlor-3,5,8-trihydrogen-1,3,5,8-tetraphospha-2,4,6,7-tetrasilabicyclo-[2.2.2]octan und damit das erste Silaphosphan, dessen Gerüst aus drei annellierten Si3P3-Sechsringen besteht. Verbindung 4 liegt als Gemisch von vier Diastereomeren vor, die durch Inversion der H-substituierten P-Atome miteinander im Gleichgewicht stehen. Bei der Reaktion von 4 mit DBU (Molverhältnis 1:3) wird das Silaphosphacuban 1 zurückgebildet.
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  • 14
    ISSN: 0044-2313
    Keywords: Tetraisopropyloctadecaphosphane(4) ; 8,14,16, 18-tetraorganyloctacyclo[13.2.1.02,13.03,11.04,9.05,7.06,10.012,17]octadecaphosphanes ; organylpolycyclophosphanes ; conjuncto-phosphane skeletons ; octacyclo[13.2.1.02,13.03,11.04,9.05,7.06,10.012,17]octadecaphosphane ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 219. Tetraisopropyloctadecaphosphane(4), P18i-Pr4  -  Preparation and Structure Determination by Nuclear Magnetic ResonanceTetraisopropyloctadecaphosphane(4) (1) has been obtained by reaction of i-PrPCl2 with P4 and magnesium and subsequent thermolysis of the crude reaction product, and has been isolated in 95% purity. According to NMR-spectroscopic investigations, 1 contains a conjuncto-phosphane skeleton consisting of a P11(5)- and a P9(3)-structural element analogous to that of deltacyclane, joined through a common P2-bridge. Thus, 1 is 8,14,16, 18-tetraisopropyloctacyclo[13.2.1.02,13.03,11.04,9.05,7.06,10.012,17]octadecaphosphane. Compound 1 is formed as a mixture of two configurational isomers 1 a and 1 b, which differ from each other in their spatial arrangements of the isopropyl group at P8.
    Notes: Tetraisopropyl-octadecaphosphan(4) (1) wurde durch Reaktion von i-PrPCl2, P4 und Magnesium und anschließende Thermolyse des Rohproduktes gewonnen und in 95proz. Reinheit isoliert. Nach kernresonanzspektroskopischen Untersuchungen enthält 1 ein Konjunkto-Phosphangerüst aus einem P11(5)-und einem Deltacyclan-analogen P9(3)-Strukturelement, die eine P2-Brücke gemeinsam haben. Demnach handelt es sich bei 1 um 8,14,16,18-Tetraisopropyl-octacyclo[13.2.1.02,13.03,11.04,9.05,7.0 6,10.012,17]octadecaphosphan. Verbindung 1 entsteht als Gemisch von zwei Konfigurationsisomeren 1a und 1b, die sich in der räumlichen Anordnung der Isopropyl-Gruppe an P8 unterscheiden.
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  • 15
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 617 (1992), S. 31-36 
    ISSN: 0044-2313
    Keywords: 1,2-Di-tert-butyldiphosphane ; 1,2,3-Tri-tert-butyltriphosphane ; Tetra-tert-butylcyclotetraphosphane ; 1-(tert-Butylphosphino)-2,3,4-tritert-butylcyclotetraphosphane ; 1-(1,2-Di-tert-butyldiphosphino)-2,3,4-tri-tert-butylcyclotetraphosbhane ; tert-Butylpolyphosphanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 224. On the Thermolysis of 1,2-Di-tert-butyldiphosphane, 1,2,3-Tri-tert-butyltriphosphane, and Tetra-tert-butylcyclotetraphosphaneOn disproportionation of 1,2-di-tert-butyldiphosphane, H(t-Bu)P—P(t-Bu)H (1), 1,2,3-tri-tert-butyltriphosphane, H2(t-BuP)3 (2), is formed which reacts further at temperatures above 100°C to give 1-(tert-butylphosphino)-2,3,4-tri-tert-butylcyclotetraphosphan, P5(t-Bu)4H (4). Compound 4 reacts with 1 or 2 with lengthening of the P-sidechain to furnish the corresponding 1-(1,2-di-tert-butyldiphosphino)-2,3,4-tri-tert-butylcyclotetraphosphane, P6(t-Bu)5H (5). At temperatures above 170°C, 5 disproportionates into the tetra-tert-butylcyclotetraphosphane, (t-BuP)4 (3) which is stable up to about 200°C, and the bicyclo[3.1.0]hexaphosphane P6(t-Bu)4 from which the polycyclophosphanes P9(t-Bu)3 and P8(t-Bu)6 arise during the further course of the thermolysis. These products are finally converted through even more phosphorus-rich and more highly condensed t-butylcyclophosphanes into elemental phosphorus. In each reaction step, varying amounts of the monophosphane derivatives t-BuPH2, (t-Bu)2PH, and (t-Bu)3P are formed. The proposed course of the reaction is further substantiated by the pyrolysis products of pure 2 and 3.
    Notes: Bei der Disproportionierung von 1,2-Di-tert-butyldiphosphan, H(t-Bu)P—P(t-Bu)H (1), entsteht 1,2,3-Tri-tert-butyltriphosphan, H2(t-BuP)3 (2), das oberhalb von 100°C zu 1-(tert-Butylphosphino)-2,3,4-tri-tert-butylcyclotetraphosphan, P5(t-Bu)4H (4), weiterreagiert. Verbindung 4 bildet mit 1 oder 2 unter Verlängerung der P-Seitenkette das entsprechende 1-(1,2-Di-tert-butyldiphosphino)-2,3,4-tri-tert-butylcylotetraphospha, P6(t-Bu)5H (5). Bei Temperaturen über 170°C disproportioniert 5 in das bis etwa 200°C beständige Tetra-tert-butylcyclotetraphosphan, (t-BuP)4 (3), und das Bicyclo[3.1.0]hexaphosphan P6(t-Bu)4, aus denen im weiteren Verlauf der Thermolyse die Polycyclophosphane P9(t-Bu)3 und P8(t-Bu)6 entstehen. Diese gehen schließlich über noch phosphorreichere und höherkondensierte tert-Butylcyclophosphane in elementaren Phosphor über. Bei jedem Reaktionsschritt werden wechselnde Mengen der Monophosphanderivate t-BuPH2, (t-Bu)2PH und (t-Bu)3P gebildet. Der angegebene Reaktionsverlauf wird durch die Thermolyseprodukte von reinem 2 und 3 bestätigt.
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  • 16
    ISSN: 0044-2313
    Keywords: Penta-tert-butylundecaphosphane(5) ; 3,5,6,10,11-penta-tert-butyltetracyclo[5.4.0.02,9.04,8]undecaphosphane ; organylpolycyclophosphanes ; configurational isomers of polycyclic phosphanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 213. Penta-tert-butylundecaphosphane(5), P11(t-Bu)5 - Preparation and Structure Determination by Nuclear Magnetic ResonancePenta-tert-butylundecaphosphane(5) (1) has been obtained by reacting t-BuPCl2, PCl3, and magnesium and subsequently thermolysing the crude reaction product, and has been isolated in 85% purity. According to NMR spectroscopic investigations, the structure of 1 differs from that of the undecaphosphanes P11R5 with smaller alkyl groups reported previously [2, 3]. The P11(5) skeleton of 1 is derived from the P9(5) skeleton, which is analogous to brexane [2, 17], by condensation of a -P(t-Bu)-P(t-Bu)- bridge. Thus 1 is 3,5,6,10,11-penta-tert-butyltetracyclo[5.4.0.02,9.04,8]undecaphosphane. Compound 1 is formed as a mixture of two configurational isomers 1a and 1b, which differ from each other in their spatial arrangements of the tert-butyl groups on P10 and P11.
    Notes: Penta-tert-butyl-undecaphosphan(5) (1) wurde durch Reaktion von t-BuPCl2, PCl3 und Magnesium und anschließende Thermolyse des Rohproduktes gewonnen und in 85proz. Reinheit isoliert. Nach kernresonanzspektroskopischen Untersuchungen hat 1 eine andere Struktur als die bereits bekannten Undecaphosphane P11R5 mit kleineren Alkylgruppen [2, 3]. Das P11(5)-Gerüst in 1 leitet sich von dem P9(5)-Gerüst mit Brexan-Struktur [2, 17] durch Anfügen einer -P(t-Bu)-P(t-Bu)-Brücke ab. Demnach handelt es sich bei 1 um 3,5,6,10,11-Penta-tert-butyl-tetracyclo[5.4.0.02,9.04,8]undecaphosphan. Verbindung 1 entsteht als Gemisch von zwei Konfigurationsisomeren 1a und 1b, die sich in der räumlichen Anordnung der tert-Butylgruppen an P10 und P11 unterscheiden.
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  • 17
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1973-1976 
    ISSN: 0044-2313
    Keywords: 2,3,4,6-Tetra-tert-butyl-2,4-dioxobicyclo[3.1.0]hexaphosphane ; 2,3,4,6-Tetra-tert-butylbicyclo[3.1.0]hexaphosphane ; Cyclophosphane Oxides ; Polycyclic Phosphanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 226. 2,3,4,6-Tetra-tert-butyl-2,4-dioxobicyclo[3.1.0]hexaphosphane, P6Bu4tO2Under suitable conditions, the reaction of tetra-tert-butylhexaphosphane, P6Bu4t (1), with cumene hydroperoxide gives rise to the corresponding dioxide P6Bu4tO2 (3) which could be isolated as the adduct P6Bu4tO2 · 0.7 C9H12O2. According to a complete analysis of the 31P{1H}-NMR spectrum compound 3 is 2,3,4,6-tetra-tert-butyl-2,4-dioxobicyclo[3.1.0]hexaphosphane, in which the oxygen atoms are bonded exocyclically to the five-membered phosphorus ring of 1. When the oxidation reaction proceeds a fission of the bicyclic P6 skeleton takes place.
    Notes: Die Reaktion von Tetra-tert-butylhexaphosphan, P6Bu4t (1), mit Cumolhydroperoxid führt unter geeigneten Bedingungen zu dem entsprechenden Dioxid P6Bu4tO2 (3), das als Addukt P6Bu4tO2 · 0,7 C9H12O2 isoliert werden konnte. Nach einer vollständigen Analyse des 31P{1H}-NMR-Spektrums handelt es sich bei 3 um 2,3,4,6-Tetra-tert-butyl-2,4-dioxobicyclo[3.1.0]hexaphosphan, in dem die Sauerstoffatome exocyclisch an den Phosphor-Fünfring von 1 gebunden sind. Bei fortschreitender Oxydation findet eine Spaltung des bicyclischen P6-Gerüstes statt.
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  • 18
    ISSN: 0044-2313
    Keywords: Diphosphane(4) ; Triphosphane(5) ; Tetraphosphane(6) ; Polyphosphorus Hydrides ; Clathrate Compounds ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 235. On the Preparation of Larger Amounts of Diphosphane(4) in the LaboratoryThe preparation of several hundred grammes of diphosphane(4) by hydrolysis of calcium phosphide in a semicontinuous process as well as the handling of larger amounts of this compound are reported. In comparison with earlier results [12], the yield has been raised by 37 percent with simultaneous increase of the accessible total amount. The white solid which is formed in the preparation and purification of diphosphane(4) is not, as was believed in earlier work [25, 8], triphosphane(5) or another, novel phosphorus hydride but is rather a clathrate compound of diphosphane(4) or the phosphanes PnHn+2 (n = 2-4) and water, respectively.
    Notes: Die Herstellung von mehreren hundert Gramm Diphosphan(4) durch Hydrolyse von Calciumphosphid in einer halbkontinuierlichen Arbeitsweise sowie die Handhabung größerer Mengen dieser Verbindung werden beschrieben. Gegenüber früheren Angaben [12] konnte die Ausbeute um 37 Prozent gesteigert werden bei gleichzeitiger Vergrößerung der zugänglichen Gesamtmenge. Der während der Darstellung und Reinigung auftretende weiße Feststoff ist nicht, wie früher angenommen [25, 8], Triphosphan(5) oder ein anderes neues Phosphorhydrid, sondern vielmehr eine Clathratverbindung von Diphosphan(4) bzw. den Phosphanen PnHn+2 (n = 2-4) und Wasser.
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  • 19
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 198. Hexa-tert-butyldecaphosphane (6), P10 (t-Bu)6  -  Preparation and Structure Determination by 31P-NMR SpectroscopyHexa-tert-butyldecaphosphane(6) (1) has been obtained by reacting a mixture of tert-butyldichlorophosphane and phosphorus trichloride (1:1) with magnesium at 20°C and has been isolated in pure form. According to 31P-NMR spectroscopic investigations 1 has a conjuncto-phosphane skeleton consisting of a bicyclic P6(4) and a monocyclic P4(4) partial structure which are linked through a σ-bond. Hence, compound 1 is 2,4,6-tri-tert-butyl-3-(2,3,4-tri-tert-butylcyclotetraphosphanyl)bicyclo[3.1.0]hexaphosphane and thus represents a new P10R6 structure type. The existence of three constitutional isomers of P10R6 indicates that the structure of polycyclic Pn(m) skeletons (m 〈 n) depends on the synthetic route and on the bulkiness of the substituents.
    Notes: Hexa-tert-butyl-decaphosphan(6) (1) wurde durch Reaktion eines Gemisches von tert-Butyldichlorphosphan und Phosphor(III)-chlorid (1:l) mit Magnesium bei 20°C gewonnen and analysenrein isoliert. Nach 31P-NMR-spektroskopischen Untersuchungen weist 1 ein Konjunkto-Phosphangerüst aus einem bicyclischen P6(4)- und einem monocyclischen P4(4)-Teilgerüst auf, die durch eine σ-Bindung verknüpft sind. Demnach handelt es sich bei Verbindung 1 um 2,4,6-Tri-tert-butyl-3-(2,3,4-tri-tert-butylcyclotetraphosphanyl)bicyclo[3.1.0]hexaphosphan und damit um einen neuen P10R6-Strukturtyp. Die Existenz von drei P10R6-Konstitutionsisomeren belegt die strukturelle Abhängigkeit polycyclischer Pn(m)-Gerüste (m 〈 n) vom Syntheseweg und von der Raumbeanspruchung der Substituenten.
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  • 20
    ISSN: 0044-2313
    Keywords: Tetraisopropyldodecaphosphane(4) ; 3,4,9,10-Tetraorganylpentacyclo-[6.4.O.O2,6.O5,12.O7,11]dodecaphosphanes ; Organylpolycyclophosphanes ; Configurational Isomers of Polycyclic Phosphanes ; Inversion of Phosphorus in Polycyclic Phosphanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Chemistry of Phosphorus. 212. Tetraisopropyldodecaphosphane(4), P12i-Pr4 - Preparation, Properties, and Molecular DynamicsAccording to an earlier crystal structure analysis, tetraisopropyldodecaphosphane(4) (1) exhibits the symmetry C2, and the substituents are arranged in all-trans position [3]. We have now found by NMR spectroscopic studies that in solution a second configurational isomer of the symmetry CS (1b) exists in addition to the molecule present in the crystal (1a). The transformation of 1a into 1b, which can only occur through a quasi synchronous inversion at the atoms P3 and P4 or P9 and P10, takes place at a noticeable rate already below room temperature.
    Notes: Tetraisopropyl-dodecaphosphan(4) (1) weist nach einer früheren Kristallstrukturanalyse die Symmetrie C2 mit all-trans-Anordnung der Substituenten auf [3]. Durch kernresonanzspektroskopische Studien konnte jetzt in Lösung neben dem im Kristall vorliegenden Molekül (1a) ein zweites Konfigurationsisomer der Symmetrie CS (1b) aufgefunden werden. Die Umwandlung von 1a in 1b, die nur durch quasi-synchrone Inversion an den Atomen P3 und P4 oder P9 und P10 erfolgen kann, läuft bereits unterhalb Raumtemperatur mit merklicher Geschwindigkeit ab.
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