| 1 | Author
| Wolf-Walther Du Mont, Mario Grenz | Requires cookie* | | Title
| Bis(trimethylsiloxy)tin(II): A Heterosiloxane as Soft Ligand  | | | Abstract
| Contrary to earlier reports the reaction of sodium trimethylsilanolate with stannous chlo-ride does not yield bis(trimethylsiloxy)tin(II) (1) but a polynuclear compound of the type Sn20(0SiMe3)2 (2). 1 is obtained from the reac-tion of stannocene with trimethylsilanole. The compound is a dimer that gives rapid exchange reactions of terminal and bridging trimethylsil-oxy groups in inert organic solvents. | | |
Reference
| (Z. Naturforsch. 38b, 113—114 [1983]; eingegangen am 10. September 1982) | | |
Published
| 1983 | | |
Keywords
| Oxastannylenes, Heterosiloxanes, NMR Spectra | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0113_n.pdf | | | Identifier
| ZNB-1983-38b-0113_n | | | Volume
| 38 | |
4 | Author
| Dieter Weber, Karl Peters, Hans Georg, Schnering, Ekkehard Fluck | Requires cookie* | | Title
| Kristallstruktur yon Pyrrolidinium-bis(diisopropylphosphinoyl)phosphid, einem System mit zweifach koordiniertem Phosphor Crystal Structure of Pyrrolidinium-bis(diisopropylphosphinoyl)phosphide, a System with Bicoordinated Phosphorus  | | | Abstract
| Pyrrolidinium-bis(diisopropylphosphinoyl)phosphide crystallizes triclinically in the space group Pi with a = 1019.6(8), b = 1271.5(4), c = 999.5(7) pm, a = 100.90(5)°, ß = 91.24(5)°, y = 99.10(5)° and Z = 2 formula units. The mean P-P bond length is 212.2 pm and hence shorter than in derivates in which the electron pairs of the bicoordi-nated phosphorus atom are bonded to one or two M(CO)5-groups. Additional p.-z-d* bonding explains the shortening of the P-P bond. | | |
Reference
| Z. Naturforsch. 38b, 208—211 (1983); eingegangen am 13. Oktober 1982 | | |
Published
| 1983 | | |
Keywords
| Pyrrolidinium-bis(diisopropylphosphinoyl)phosphide, Crystal Structure, NMR Spectra | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0208.pdf | | | Identifier
| ZNB-1983-38b-0208 | | | Volume
| 38 | |
5 | Author
| Herbert Schumann, Karl-Heinz Köhricht, Manfred Meißner | Requires cookie* | | Title
| Organometallphosphin-substituierte Übergangsmetallkomplexe, XIX [1] Carbonyl-dinitrosyl-organometallphosphin-eisen-Komplexe Organometalphosphine-substituted Transition Metal Complexes, XIX [1] Carbonyl Dinitrosyl Organometalphosphine Iron Complexes Die Komplexe der Pseudonickelcarbonyl-Serie  | | | Abstract
| The reactions of dicarbonyl dinitrosyl iron with tri-fertf-butylphosphine, di(feri-butyl)-trimethylsilyl-, -germyl-, -stannyl-phosphine, ferZ-butyl-bis(trimethylsilyl)-, -(germyl)-, -(stannyl)phosphine, as well as with tris(trimethylsilyl)-, -(germyl)-, and -(stannyl)phos-phine result in the elimination of one CO ligand and the formation of the corresponding carbonyl dinitrosyl organometalphosphine iron complexes. The IR, X H, 31 P, 13 C, and 119 Sn NMR spectra of the new complexes are reported and discussed. | | |
Reference
| Z. Naturforsch. 38b, 705—710 (1983); eingegangen am 22. Februar 1983 | | |
Published
| 1983 | | |
Keywords
| Organometal Phosphines, Carbonyl Dinitrosyl Iron Complexes, NMR Spectra | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0705.pdf | | | Identifier
| ZNB-1983-38b-0705 | | | Volume
| 38 | |
6 | Author
| Fritz Seel, Norbert Klein | Requires cookie* | | Title
| N-Methylcarbamoylphosphate, I. Synthese N-Methylcarbamoyl Phosphates, I. Synthesis  | | | Abstract
| Solutions of mono-and bis-N-methylcarbamoyl phosphates in non-aqueous solvents [e.g. acetonitrile, dimethyl formamide, chloroform) and, surprisingly, even in water are readily obtained by the reaction of methyl isocyanate with the solution of an appropriate mono-or dihydrogenphosphate. The course of the reactions and the limited stability of N-methylcarbamoyl phosphate ions in solutions can be monitored through 31 P NMR measurements. Various types of compounds, including a coordination compound of cobalt could.be isolated in crystalline form: [Et3NH]HX, KHX, NH4HX, Na2X • H20, MgX • 4 H20, CaX • H20, SrX • 2 HaO, BaX • H20, ZnX • 5 H20, CdX • 2 H20, [(NH3)5COX]C104, [EtsNHjY, AgY • MeCN, X = MeNHC(0)0P03, Y = [MeNHC(0) 0]2P02. | | |
Reference
| Z. Naturforsch. 38b, 797—803 (1983); eingegangen am 24. Februar 1983 | | |
Published
| 1983 | | |
Keywords
| N-Methylcarbamoyl Phosphates, Preparation, NMR Spectra | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-0797.pdf | | | Identifier
| ZNB-1983-38b-0797 | | | Volume
| 38 | |
7 | Author
| Wieland Krüger, Michael Sell, Reinhard Schmutzler | Requires cookie* | | Title
| A New Synthesis of Organodifluorophosphites and their Reactions with Platinum(II) Complexes  | | | Abstract
| Alkyldifluorophosphites, ROPF2 (R = ^-substituted benzyl group, neopentyl, 1-ada-mantyl) have been obtained by a new method, involving reaction of the appropriate alkyl trimethylsilylether, ROSiMe3 with chlorodifluorophosphine, PF2C1. Reactions of these difluorophosphites with platinum(II) complexes of the type [LaPtCla] (L = PEt3, PPI13) led to products such as irans-[L2PtCl(POF2)] and {[p-XC6H4CH2PPh3]+}2[Pt(POF2)4] 2 -, (X = H, Me, Cl, N02). The ease of carbon-oxygen cleavage in ROPF2 is characteristically related to the nature of the leaving group, R. | | |
Reference
| Z. Naturforsch. 38b, 1074—1080 (1983); received April 25 1983 | | |
Published
| 1983 | | |
Keywords
| Organodifluorophosphites, Difluorophosphonate Complexes, Platinum, NMR Spectra | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-1074.pdf | | | Identifier
| ZNB-1983-38b-1074 | | | Volume
| 38 | |
9 | Author
| Alfred Schmidpeter, Hubert Klehr | Requires cookie* | | Title
| Überführung von Triazaphospholen in Diazaphosphole durch Acetylenaddition/Nitrileliminierung [1] Conversion of Triazaphospholes into Diazaphospholes by Acetylene Addition/Nitrile Elimination [1]  | | | Abstract
| Acetylene di-and (less easily) monocarboxylic esters replace nitriles from the 4,5-position of 1,2,4,3-triazaphosphole rings to give carboxyl derivatives of 1,2,3-diaza-phospholes, presumably by a cycloaddition/cycloreversion mechanism. In cases with a mobile N-substituent alternatively the loss of N2 seemed feasible, but was normally not observed. | | |
Reference
| Z. Naturforsch. 38b, 1484—1487 (1983); eingegangen am 7. Juli 1983 | | |
Published
| 1983 | | |
Keywords
| Dicoordinate Phosphorus, Azaphospholes, Cycloaddition, Cycloreversion, NMR Spectra | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-1484.pdf | | | Identifier
| ZNB-1983-38b-1484 | | | Volume
| 38 | |
12 | Author
| Umlagerung Synthese, Eigenschaften Diphenylphosphinosubstituierter Uracile, Jochen Ellermann, AlfonsA M Demuth | Requires cookie* | | Title
| Chemie polyfunktioneller Moleküle, 74 [1] [1] Synthesis, Rearrangement and Properties of Diphenylphosphino Substituted Uracils  | | | Abstract
| 5-Bromo-uracil (2) with chloro-diphenylphosphine and triethylamine gives 5-bromo-N(1),N(3)-bis(diphenylphosphino)-uracil (3). In moist acetone, 3 is hydrolyzed to 5-bromo-N(l)-diphenylphosphino-uracil (4). 3 reacts with n-butyllithium under rearrangement and, with HCl, under elimination of a PPh2-group, forms C(5)-diphenylphosphino-uracil (7 a). Recrystallization of 7 a from ethanol yields the ethanol-1:1-adduct 7 b. Heating of 7 a in dimethylsulfoxide with D20 yields the N(l),N(3)-dideutero-C(5)-diphenylphosphino-uracil (7 c). All compounds were characterized by infrared, Raman, iH, 31 P NMR and mass spectra. 7 a shows a very small antitumor activity. | | |
Reference
| Z. Naturforsch. 38b, 1165—1172 (1983); eingegangen am 19. Mai 1983 | | |
Published
| 1983 | | |
Keywords
| Diphenylphosphino Substituted Uracils, Rearrangement, NMR Spectra, Vibrational Spectra, Mass Spectra | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-1165.pdf | | | Identifier
| ZNB-1983-38b-1165 | | | Volume
| 38 | |
13 | Author
| Matthias Moll, Behrens* Werner Helmut, Günther Popp, WolfPeter Liehr, Fehlhammer | Requires cookie* | | Title
| Über das [C7H7Fe2(CO)5]--Anion (C7H7 = Cycloheptatrienyl) About the [C7H7Fe2(CO)5]--Anion (C7H7 = Cycloheptatrienyl)  | | | Abstract
| The extremely unstable anionic complex [C7H7Fe2(CO)6]~ (C7H7 = cycloheptatrienyl) which decomposes in polar solvents under CO elimination to give [C7H7Fe2(CO)s]~ can be prepared by deprotonation of C7H8Fe2(CO)6 (C7H8 = cycloheptatriene) with NaN(SiMe3)2 in CßHe-The NMR spectra of [C7H7Fe2(CO)5]~ show the highly fluctional character of this anion in solution. The X-ray structural parameters of Ph4As[C7H7Fe2(CO)5] (space group P2i/n) can be interpreted in terms of a rotation of the tub shaped C7H7 ring against the CO bridged Fe2(CO)5 fragment in the solid state. Consequently, each iron atom is alternatingly rj 3 -or ^-coordinated to the allyl anion and the diene part, respectively, of the anionic 8n system of the cycloheptatrienyl ring. | | |
Reference
| Z. Naturforsch. 38b, 1446—1453 (1983); eingegangen am 7. Juni 1983 | | |
Published
| 1983 | | |
Keywords
| Cycloheptatrienyl Pentacarbonyl Diferrate, IR Spectra, NMR Spectra, X-Ray | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-1446.pdf | | | Identifier
| ZNB-1983-38b-1446 | | | Volume
| 38 | |
16 | Author
| Jochen Ellermann, AlfonsA M Demuth | Requires cookie* | | Title
| Chemistry of Poly functional Molecules, 75 [1] The Reaction of 5-Bromo-uracil with Sodium Diphenylphosphide  | | | Abstract
| 5-Bromo-uracil (1) reacts with sodium diphenylphosphide or a mixture of sodium diphenylphosphide and sodium amide in liquid ammonia to give sodium 5-bromo-uracilate (5 a). From water 5 a crystallizes with one mole H2O yielding 5b. Treatment of 5 a with D2O yields sodium 5-bromo-N-deutero-uracilate-D20 (1/1) (5 c). With chlorodiphenyl-phosphine 5a forms 1-diphenylphosphino-uracil (2). 5a, b, c show N(l)-N(3)-(H/D)-tauto-merism in concentrated D2O solutions already, but in DMSO or Dö-DMSO only in dilute solutions. All the compounds were characterized by infrared, Raman, X H NMR, UV spectra and conductometry. | | |
Reference
| Z. Naturforsch. 38b, 1568—1574 (1983); eingegangen am 6. Juni/2. August 1983 | | |
Published
| 1983 | | |
Keywords
| Sodium 5-Bromo-uracilates, Deutero Derivatives, Tautomerism, NMR Spectra, UV Spectra, Vibrational Spectra | | |
Similar Items
| Find | | DEBUG INFO
| | | | TEI-XML for
| default:Reihe_B/38/ZNB-1983-38b-1568.pdf | | | Identifier
| ZNB-1983-38b-1568 | | | Volume
| 38 | |
|