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1.
On the Reaction of Halomethylphosphonium Halides, [R3PCYnX3–n]X, with Phosphanes, R′3P The results of the reaction of 19 different halomethylphosphonium halides, [R3PCYnX3–n]X (R = Ph, n-Bu, Me2N, Et2N; Y = H, F; X = Cl, Br, I; n = 0–2), with Ph3P, n-Bu3P, and (R2N)3P are presented. As reaction products bisphosphonium salts, [R3P? CYnX2–n? PR′3]X2, and phosphoranylphosphonium salts, [R3P=CY? PR′3]X, or reduced (halo)methyl-phosphonium salts, [R3PCHYnX2–n]X, are obtained. [Ph3PCBrF2]Br and [Bu3PCBrF2]Br react with R′3P by trans-alkylation forming [R′3PCBrF2]Br. The factors influencing the course of the reaction are discussed.  相似文献   

2.
On the Reaction of Silver with Carbon Dioxide Mechanical activation of metallic silver in a CO2 atmosphere was shown to oxidize the silver. The resulting monovalent silver was found by a wet chemical procedure to be made up of Ag+ ions, while the Ag2CO3 was determined from Debye-Scherrer patterns. During mechanical treatment CO2 and the CO formed are absorbed within the solid. The reaction equation 2 Ag + 2 CO2 ← Ag2CO3 + CO is suggested for the reaction, giving a positive free enthalpy of 212 kJ/mol. This high amount of energy is locally supplied during the mechanical treatment of the metallic silver.  相似文献   

3.
Zusammenfassung Die Wechslersche Reaktion auf Polyvinylchloridpolymere (PVC) mit Pyridin, durch die in Gegenwart methanolischer Natronlauge auftretende Braunschwarzfärbung der Lösung gekennzeichnet, daher aber nur im Rahmen dieser Bedingungen charakteristisch, beruht auf einer Reihe von Spaltungsvorgängen, die, wie wahrscheinlich gemacht werden konnte, zum Teil zum Glutacondialdehyd (Natriumenolat) als Zwischenprodukt führen. Dadurch ist zugleich eine Verschärfung des PVC-Nachweises möglich, indem man den Glutacondialdehyd in saurer Lösung mit -Naphthylamin kondensiert, den entstandenen Pentamethinfarbstoff mit Amylalkohol extrahiert und dessen Umschlag von Rot nach Gelb und wieder nach Rot mit Lauge und Säure zur weiteren Charakterisierung heranzieht.  相似文献   

4.
The removal of phenyl groups from disilane derivatives with HCl and HBr to form silicon-halogen bonds has been studied in a variety of methylphenyldisilanes to establish the possible range of application. Besides the preparation of several new compounds, a convenient method is described for the synthesis of certain disilane derivatives which have until now been accessible only with difficulty.  相似文献   

5.
Triphenylphosphine reacts with thionyl chloride to give [Ph3PCl]Cl, Ph3PO and Ph3PS the formation of the anions S(O)Cl and SCl being discussed; the crystal structure of [Ph3PCl]Cl · S(O)Cl2 is reported.  相似文献   

6.
The first product identified from the reaction of chloroacetone (1) with phenylhydrazine is 2-phenylazo-propene (2). Two further isolated products are methylglyoxal bisphenylhydrazone4 and the addition product of4 and2, its structure6 has been derived from spectroscopic data (1H-nmr and uv).

1. Mitt. über Additionsprodukte von Hydrazinderivaten an Azoolefine.  相似文献   

7.
8.
On the Reaction of Fluorophosphanes with Silylazides . The fluorophosphanes Ph2PF ( 1 ), PhOPF2 ( 2 ), C5H10NPF2 ( 3 ), (Et2N)PF2 ( 4 ), and (Et2N)2PF ( 5 ) react with Me3SiN3 via azidophosphanes R3?nP(N3)n to oligo- and polyphosphazenes, (RR′P?N)n. (iPr2N)2PF ( 6 ), however, is oxidized by Me3SiN3 yielding the N-silylated phosphazene (iPr2N)2PF?N? SiMe3 ( 7 ). tBuPh2SiN3 is considerably less reactive. On contrary to Me3SiN3 it even oxidizes 5 and 1 forming (Et2N)2FP?N? SiPh2tBu ( 10 ) and Ph2FP?N? SiPh2tBu, resp.  相似文献   

9.
Zusammenfassung Es wurde die Reaktion von COS mit reinem Hydrazinhydrat und in Gegenwart von NaOH bzw. Natriumalkoholaten untersucht. Dabei konnten in kristallisierter Form das Na-Salz der Hydrazinmonothiocarbonsäure sowie das Dihydrazonium- und das Dinatriumsalz der Hydrazin-N,N-bismonothiocarbonsäure, letzteres wasserfrei und als Pentahydrat, erhalten werden. Durch Umsatz der genannten Na-Salze mit Methyl- oder Äthyljodid und Benzylchlorid wurden die S-Ester der Hydrazinmonothio-und der Hydrazin-N,N-bismonothiocarbonsäure dargestellt. Eine vergleichende Betrachtung der bereits bekannten Reaktionsarten von CO2, COS und CS2 mit Hydrazinhydrat wird angestellt.Herrn Prof. Dr.E. Hayek, Innsbruck, zum 60. Geburtstag in Dankbarkeit gewidmet.  相似文献   

10.
11.
Summary The reaction of dichlorodiorganosilanes with dialkylphosphonates is described. Depending on the reaction conditions diorganosilyl-bis(O-alkylphosphonates)R 2Si[OP(O)H(OR)]2 and diorganosilylphoshonates [-R2Si-OP(O)HO-], respectively, are formed.Using this type of reaction, O-alkoxysilyl O-alkylphosphonates can be obtained both by interaction of dialkylphosphonates with dichlorodialkoxysilanes or chlorodialkoxyalkylsilanes, respectively.
Herrn Professor Dr. E. Hengge anläßlich seines 60. Geburtstages gewidmet  相似文献   

12.
The series of ,-diiodopermethylpolysilanes, I(SiMe 2) n I, (n=4–6) andX(SiMe 2)4 X, (X=Cl, Br) has been prepared by the action of halogen on the corresponding cyclic compounds (SiMe 2) n . The mass spectra, NMR-, IR- andRaman-spectra of these compounds have been recorded.
Herrn Prof. Dr.Josef Schurz zum 60. Geburtstag gewidmet.  相似文献   

13.
Reaction of Imidodiphosphoryl Tetrachloride with Phosphorus Pentachloride Imidodiphosphoryl tetrachloride quantitatively reacts with PCl5 to form, HCl, POCl3, and Cl3P?N? POCl2. The mechanism of the reaction is discussed. Using 32P-labeled PCl5 was proved that the attack of the PCl5 to imidodiphosphoryl tetrachloride does occur about an oxygen atom.  相似文献   

14.
Zusammenfassung Die Umsetzung von Diketen (1) mit Cyclanonanilen (2) gibt als Hauptprodukte 5.6-Polymethylen-4-pyridone (5) neben, geringen Mengen von 4-Pyronderivaten (4). Bei der Umsetzung von1 mit Aralkylketonanilen6 entstehen, außer den entsprechenden 4-Pyridonen8 beträchtliche Mengen an 1-Phenyl-1.5-bis-(phenylamino)-1.4-hexadien-3-onen (7), welche beim Erhitzen mit HCl Ringschluß zu8 erleiden. Benzoylessigester (9) reagiert mit1 zum 3-Acetyl-4-hydroxy-6-phenyl-2-pyron (11).
Syntheses of heterocycles, CLIII: Reaction of diketene with ketone aniles
The reaction of diketene (1) with cyclanone aniles (2) gives mainly 5.6-polymethylene-4-pyridones (5) besides some 4-pyrone derivatives (4). The action of1 on aralkyl ketone aniles (6) yields the corresponding 4-pyridones (8), and a considerable amount of 1-phenyl-1.5-bis-(phenylamino)-1.4-hexadien-3-ones (7). The latter undergo ring closure (with HCl) affording the 4-pyridones (8). Diketene (1) reacts with ethyl benzoylacetate (9) yielding 3-acetyl-4-hydroxy-6-phenyl-2-pyrone (11).


Aus der DissertationI. Herbst, Universität Graz, Februar 1968.  相似文献   

15.
The reaction of fluorosilanes with lithium salts of bulky amines like tetramethyl-piperidine and di-tert. butylamine leads to stable aminofluorosilanes of the type R-SiF2-NRR [R=F, C(CH3)3, C6H5, C6H4N(CH3)2]. Lithium salts of silylamines react analogously: R2Si(NR-SiF2R)2 (R=R= =CH3, R=C6H5). An eight membered Si–N-ring is obtained in the reaction of a disubstituted silylaminofluorosilane with the dilithium salt of a silylamine. The mass-,1H-, and19F-NMR spectra of the above mentioned compounds are reported.  相似文献   

16.
Zusammenfassung Es konnte festgestellt werden, daß bei Reaktionstemperaturen zwischen 190° und 230°C keine direkte Addition von Stickoxid-Gas an metallisches Na unter Bildung von Nitrosylnatrium. NaNO, stattfindet. Vielmehr konnte gezeigt werden, daß die Reaktion analog der von Natriumoxid mit Stickoxid-Gas unter Bildung von Natriumnitrit. Natriumhyponitrit, Natriumoxid und geringer Mengen Natriumdioxonitrat (II) (Natriumhydronitrit) abläuft.Mit 2 AbbildungenVon diesem Institut Herrn Prof. Dr.O. Kratky. Graz. zum 60. Geburtstag gewidmet.  相似文献   

17.
On the Reaction of Aluminium with Heavy Metal Chlorides in Molten Salts The conversion of aluminium in an equimolar AlCl3—NaCl melt with heavy chlorides (PbCl2, CdCl2, CuCl2) to AlCl3 is effected in the temperature range of 620—780 K according to the time-concentration course as a reaction of first order. From the temperature dependence the apparent activation energies have been calculated. They are in the order of magnitude of the activation energies for the diffusion of the corresponding metal ions in molten salts.  相似文献   

18.
Lithium salts of hydrazines react with fluorosilanes under formation of fluorosilylhydrazines and LiF. Five membered rings are obtained in the reaction of bis(fluorosilyl)-hydrazines with lithiated amines. The mass,1H-and19F-nmr spectra of the compounds are reported.
  相似文献   

19.
Reaction of tert -Butyl-phosphaalkyne with Molybdenum Complexes The reaction of tBuC≡P with [(CH3CN)3Mo(CO)3] leads to the complex [Mo(CO)4〈Mo(CO)24-P3CtBu){η4-P2(CtBu)2}〉] 1 as well as to the alkyne complexes [Mo(CO)4〈{P3(CtBu)2}{Mo(CO)2(CtBu)}{η3-P2(CtBu)2}〉] 2 and [Mo(CtBu){η4-P2(CtBu)2(CO)}{η5-P3(CtBu)2}] 3 . All compounds are characterized by X-ray structural analysis, by NMR- and IR spectroscopy and by mass spectrometry. In complex 1 a 1,3-diphosphacyclobutadiene and a 1,2,4-triphosphacyclobutadiene are connected by two molybdenum carbonyl centres. In 2 a 1,3-diphosphacyclobutadiene is π- and a novel 1,2,4-triphospholyl ligand is σ-bonded at two Mo centres. A characteristic feature of 3 besides a π co-ordinated 1,2,4-triphospholyl ligand is a 3,4-diphosphacyclopentadienone as ligand, formed via CO insertion during the cyclodimerisation of two phosphaalkynes.  相似文献   

20.
Reaction of 3-methyl-1,3-oxazolidine with phthalic anhydride in chloroform leads to ring opening and higher oligomers2 are formed. These are cleaved by addition of protic solvents and 2-methylaminoethyl hydrogenphthalate3 a is obtained. Other 1,3-oxazolidines and succinic anhydride behave similarly.
Herrn Prof. Dr. Dr. h. c.Karl Kratzl mit den besten Wünschen zum 70. Geburtstag gewidmet.  相似文献   

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