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  • Articles  (40)
  • Wiley-Blackwell  (39)
  • American Institute of Physics (AIP)  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 10-12 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A scanning optical profilometer is described which can simultaneously and independently measure the differential phase/amplitude variation of light reflected off an object surface. This information may then be interpreted as topographical and reflectivity variation of the object surface. The system is based on a heterodyne interferometer and uses two beams to probe the surface. The theoretical sensitivity of the system is 3×10−3 mrad in phase and 3 in 105 in reflectivity variation, both measured in a 1 kHz bandwidth. Preliminary measurements of film thickness and reflectivity variation are presented. This system also has potential applications for imaging objects with minute structural variations.
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  • 2
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tertiary phosphinedichlorides and hydrazinedichloride as a single phase liquid, give phosphine-azinium-dichlorides R3P—NH—NH—PR3⊐Cl2. Triarylphosphine-azinium-dichlorides can be deprotonated to phosphineazines, R3P = N—N = PR3, by liquid ammonia, while the mixed aryl-alkyl- and the pure alkyl-derivatives need potassium amide. The stability of phosphineazines decrease with replacing aryl- by alkyl-groups. Phosphinedichlorides, the starting materials, were prepared by reacting phosphines with COCl2.
    Notes: Tertiäre Phosphindichloride reagieren mit Hydraziniumdichlorid in der Schmelze zu Phosphinaziniumdichloriden, R3P—NH—NH—PR3⊐Cl2. Die Triarylphosphinazinium-dichloride können schon mit fl. NH3 zu den roten Phosphinazinen, R3P = N—N—N = PR3, dehydrochloriert werden. Bei den gemischten Arylalkyl- und den Alkylderivaten gelingt die Deprotonierung erst mit Kaliumamid. Mit zunehmender Substitution der Aryl- durch Alkylreste nimmt die Stabilität der Phosphinazine rasch ab. Die für die Darstellung der Phosphinaziniumdichloride benötigten tertiären Phosphindichloride wurden durch Phosgenierung der Phosphine gewonnen.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 363 (1968), S. 183-190 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Triphenylphosphine-azine, Ph3P = N—N = PPh3, shows the typical chemical behaviour of phosphonium ylides. Reactions with aldehydes lead to azines and triphenylphosphineoxide, showing phosphazine, Ph3P = N—N = CHR, as an intermediate, which can be isolated. Carbon dioxide forms an unstable diisocyanate, caught by aniline as the anilide of hydrazodicarbonic acid. In the 1:1 compound with dimethylester of acetylene dicarbonic acid the C2-unit, according to the IR spectrum, is thought to be placed in between the —P = N-group.
    Notes: Triphenylphosphinazin, Ph3P = N—N = PPh3, zeigt das für Phosphoniumylide charakteristische Reaktionsverhalten. Die mit Aldehyden zu Azinen und Triphenylphosphinoxid führende Reaktion verläuft über die isolierbare Zwischenstufe des Phosphazins, Ph3P = N—N = CHR. Mit CO2 bildet sich unbeständiges Diisocyanat, das mit Anilin als Hydrazodicarbonsäuredianilid abgefangen wurde. Für die bei der Umsetzung mit Acetylendicarbonsäuredimethylester gebildete 1:1-Verbindung wird auf Grund des IR-Spektrums eine Einschiebung der C2-Einheit des Acetylens in eine P = N-Gruppe angenommen.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 361 (1968), S. 203-208 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The reaction of triphenylphosphine-dihalides with N2H4 · 2 HCl in a single-phase-liquid-state was investigated.Ph3PC2 undergoes condensation with both NH2 groups, forming triphenylphosphine-azinium-dichloride, [Ph3PNH—NHPPh3] 2 Cl-. Ph3PBr2 and Ph3PJ2, however, cause redox reactions, giving salts of bis-(triphenylphosphine)-nitride, halogen and ammonium halides.
    Notes: Es wurde die Schmelzreaktion der Triphenylphosphindihalogenide mit N2H4 · 2 HCl untersucht. Während mit Ph3PCl2 an beiden NH2-Gruppen HCl-Kondensation unter Bildung des Triphenylphosphinaziniumdichlorids, [Ph3P—NH—NH—PPh3] Cl2 erfolgt, finden mit Ph3PBr2 und Ph3PJ2 Redoxreaktionen statt. Dabei entstehen Bis-(triphenylphosphin)nitrid-Salze, elementares Halogen und Ammoniumhalogenide.
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  • 5
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Phosphoric Acid Ester Chlorides, Phosphinic Acid Chlorides, Diphosphoric Acid Tetraesters, and Phosphinic Acid Anhydrides by Action of the System Triphenylphosphine/Carbon Tetrachloride on Phosphoric Acid Esters and Phosphinic AcidsPhosphoric acid mono- and diesters and phosphinic acids react with triphenylphosphine/carbon tetrachloride to acid chlorides or corresponding acid anhydrides. In presence of triethylamine only acid anhydrides can be obtained.
    Notes: Phosphorsäurehalbester und Phosphinsäuren reagieren mit dem Reagenz Triphenylphosphin/Tetrachlorkohlenstoff teilweise zu Säurechloriden, teils auch zu den betreffenden Säureanhydriden. In Gegenwart von Triäthylamin erfolgt stets die Bildung von Säureanhydriden.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 348 (1966), S. 175-178 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: (C6H5)2SeCl2 and anhydrous NH3 react in methylene chloride giving the salt-like bis-[diphenylselenide]-nitride chloride, [ø 2Se=N=Se ø2]X (X = Cl), from which, by metathetic interactions, salts with X = Br, N3, IO4, 1/3 [FeIII(CN)6] have been prepared. Solutions of these salts in methanol exhibit good electrical conductivities.
    Notes: (C6H5)2SeCl2 und gasförmiges NH3 reagieren in Methylenchlorid zu dem salzartig gebauten Bis-[diphenylselenid]-nitrid-chlorid. Durch doppelte Umsetzungen wurden daraus das Bromid, Azid, Perjodat und Hexacyanoferrat (III) hergestellt. Die Lösungen der Salze in Methanol zeigen gute elektrische Leitfähigkeit.
    Additional Material: 1 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 406 (1974), S. 131-144 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Preparation of Silylated Alkylene-Bisiminophosphoranes and the Cyclisation with Phosphorus(V) Fluorides thereofNew silylated bisiminophosphoranes of the type Ph2P(NSi(CH3)3)(CH2)n Ph2P(NSi(CH3)3) 2a, b and c (n = 1, 2, 3) and the similary structured cyclic siline 5 are prepared by reaction of the corresponding alkylene-bisphosphines with silylazides.Using etheric HCl, the opened chain compounds 2a and b, are desilylated; they undergo condensation reactions with fluorophosphoranes PhxPF5-x(x = 0, 1) - the same as 5 - splitting off fluorosilane forming the partially fluorinated ionic diphosphaza-phosphonium ring systems 7a, b and 8.
    Notes: Die Synthese neuartiger, silylierter Bisiminophosphorane des Typs Ph2P(NSi(CH3)3)—(CH2)(n)—PPh2(NSi(CH3)3) 2a, b und c mit n = 1, 2, 3 und des analog gebauten cyclischen Silins 5 erfolgt durch Umsetzung der betreffenden Alkylenbisphosphine mit Silylaziden. Die offenkettigen Vertreter 2a und b werden von ätherischer HCl desilyliert; sie kondensieren - ebenso wie 5 - mit den Fluorphosphoranen PhxPF5-x(x = 0, 1) unter Fluorsilanabspaltung zu den ionischen, partiell fluorierten Diphosphazaphosphonium-Ringsystemen 7a, b und 8. Die Identifizierung und Charakterisierung der Reaktionsprodukte erfolgt vor allem durch 19F- und 31P-NMR-Spektroskopie.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 417 (1975), S. 161-170 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Reaction of Cyclophosphanes with Carbon Tetrachloride and AminesThe cleavage of phenylcyclophosphanes with carbon tetrachloride leads to the chloro-trichloromethyl-phosphine 2a; tetracyclohexycyclotetraphosphine decomposes in the same manner to the diphosphane 3. Methyl-and ethylcyclophosphanes give with carbon tetrachloride the monoquaternary salts 4c and 4d. The cleavage products 5, 2d and 6 are also formed. The tris-(amino)-phosphonium salts 7a-j and the chloromethylphosphonium chloride 8a are obtained by reaction of amines with cyclophosphanes and carbon tetrachloride. All phosphonium chlorides are isolated and charakterized as perchlorates.
    Notes: Phenylcyclophosphane werden durch Tetrachlorkohlenstoff zum Chlor-trichlormethyl-phosphin 2a, Tetracyclohexylcyclotetraphosphan zum Diphosphan 3 abgebaut. Methyl-und Äthylcyclophosphane bilden mit Tetrachlorkohlenstoff die monoquartären Salze 4c bzw. 4d. Daneben entstehen die Spaltprodukte 5 bzw. 2d und 6. Durch die Einwirkung von Aminen auf Cyclophosphane und Tetrachlorkohlenstoff werden die Tris(amino)-phosphoniumsalze 7a,/-j und das Chlormethylphosphoniumchlorid 8a erhalten. Alle Phosphoniumchloride werden als Per-chlorate isoliert und charakterisiert.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 428 (1977), S. 125-128 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Simple Method of Preparing Bis(trimethylsilyl)esters of the Mono-, Di-, and Trisulfuric AcidHexamethyl disiloxane 1 reacts with one mole sulfurtrioxide under insertion giving bistrimethylsilylsulfate 2. Through further stepwise insertion of sulfur trioxide the silylester of disulfuric acid 3 and the silylester of trisulfuric acid 4 are obtainable.
    Notes: Hexamethyldisiloxan 1 reagiert mit einem Mol Schwefeltrioxid unter Einschiebung zu Bistrimethylsilylsulfat 2. Durch weitere stufenweise Insertion des Schwefeltrioxids läßt sich daraus über den Silylester der Dischwefelsäure 3 auch der Silylester der Trischwefelsäure 4 gewinnen.
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  • 10
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Phosphorus-Carbon-Halogen Compounds. 16. On the Reaction of Alkyldiphenylphosphanes with Tetrachloromethane and a Convenient Preparation of (α-Chloroalkyl)diorganylphosphanesThe reaction of alkyldiphenylphosphanes with carbon tetrachloride in aprotic solvents gives (dichloromethyl)alkyldiphenylphosphonium chloride and (α-chloroalkyl)diphenylphosphanes. Their formation is attributed to the dehydrochlorination of the intermediate dichloroalkyl diphenylphosphoranes by the ylid (dichloromethylene)alkyldiphenylphosphorane, also formed intermediately. In protic solvents the ylids abstract protons while the dichlorophosphoranes remain unchanged. Dehydrochlorination of alkylsubstituted dichlorophosphoranes by means of tertiary amines turned out to be a convenient synthesis of (α-chloroalkyl)diphenylphosphanes.
    Notes: Bei der Umsetzung von Alkyldiphenylphosphanen mit Tetrachlorkohlenstoff werden in aprotischen Lösungsmitteln(Dichlormethyl)alkyldiphenyl phosphoniumchlorid und (α-Chloralkyl)diphenylphosphane wurde in der Dehydrochlorierung erhalten. Ihre Entstehung wir auf eine Dehydrochlorierung der intermediär gebildeten Dichloralkyldiphenylphosphorane durch das ebenfalls zwischendurch entstandene Ylid (Dichlormethylen)alkyldiphenylphosphoran zurückgeführt. In protischen Solventien abstrahieren die Ylide Protonen vom Lösungsmittel, wobei die Dichlorphosphorane intakt bleiben. Ein bequemes Verfahren zur Synthese von (α-Chloralkyl)diphenylphosphanen wurde in der Dehydrochlorierung alkylsubstituierter Dichlorphosphorane mit tert. Aminen gefunden.
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