Gitterschwingungsspektren. XVI. FIR-Spektren und Schwingungsanalyse von Dichalkogeniden und Diphosphiden des Eisens,Rutheniums, Osmiums und Platins

Lattice Vibration Spectra. XVI. FIR Spectra and Vibration Analysis of Dichalcogenides and Diphosphides of Iron, Ruthenium, Osmium, and Platinum The FIR absorption spectra of pyrite type compounds RuS₂, RuS_2–xSe_x, RuSe₂, RuTe₂, OsS₂, OsSe₂, and PtP₂ as well as loellingite type phosphides FeP₂, RuP₂, and OsP₂ are reported. For RuS₂, RuSe₂, RuTe₂, OsS₂, and PtP₂ all of the five infrared allowed modes (k = 0) are observed. As a first result of a numerical normal coordinate treatment vibration forms of pyrite structure are communicated. The spectra show that lattice forces of corresponding sulfides, tellurides, and phosphides are about the same strength, but increase strongly by substitution of iron by ruthenium and especially of ruthenium by osmium. The lattice constants of the RuS_2–xSe_x solid solution obey Vegard's rule.     

Literatur. Benzin, Benzinersatzstoffe und Mineralschmiermittel, ihre Untersuchung, Beurteilung und Verwendung

Ohne Zusammenfassung     

Gymnemagenin,Struktur und O-Isopropylidenderivate Glykoside und Aglykone. 313. Mitteilung

Several O-isopropylidene derivatives of gymnemagenin ( 5 ), a hexahydroxytriterpene from the leaves of Gymnema sylvestre R. Br. have been prepared, which may perhaps be useful to correlate gymnemagenin with other triterpenes. From the data obtained we conclude that gymnemagenin is 3β, 16β, 21β, 22α, 23, 28-hexahydroxy-olean-12-ene.     

Fluoralkyl- und Fluorarylborazinderivate, 1. Mitt.

Zusammenfassung N-Fluoralkyl- und B-Fluorarylborazinderivate wurden dargestellt und charakterisiert. Die IR-Spektren werden angegeben und teilweise zugeordnet.

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N-Fluorolkyl- and B-Fluoroarylborazines have been preparcd. The IR-spectra are recorded and partially assigned.

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Borchelate und Bormetallchelate, 4. Mitt.

The i.r., u. v.,¹H n.m.r.,¹³C n.m.r., and¹¹B n.m.r. spectra of several substituted diphenylboron chelates derived from salicylaldehyde azomethines were compared with respect to the influence of the amine substituentR. O–B–N-6-ring constitution of the chelates29–32 [R=OH, NH₂, NHC₆H₅, N(CH₃)₂] can be deduced from the spectra.

Als 3. Mitt. gilt:F. Umland undE. Hohaus mit Beiträgen vonW. Riepe, K. Brodte, C. Schleyerbach undD. Szonn. Untersuchungen über borhaltige Ringsysteme vom Chelattyp. Forschungsbericht des Landes Nordrhein-Westfalen Nr. 2538. Opladen: Westdeutscher Verlag. 1976.     

Cyclopolymerisation. 11. Mitt. Polyelektrolyte und Polyampholyte aus N-Alkyl-N, N-diallylaminen und Methacrylamid

Ohne Zusammenfassung     

Zur Chemie und Strukturchemie der Phosphide und Polyphosphide. 20. Darstellung,Struktur und Eigenschaften der Alkalimetallmonophosphide NaP und KP

Chemistry and Structural Chemistry of Phosphides and Polyphosphides. 20. Preparation, Structure, and Properties of the Alkali Metal Monophosphides NaP and KP The monophosphides NaP and KP were prepared by reaction of the elements in sealed glass ampoules at 725 K and 765 K, respectively. NaP yields as black reflecting needles, whereas KP is formed as microcrystalline substance with colour of coke. The compounds react very rapidly with aqueous reagents forming solid polymeric yellow phosphanes (PH)_x and partially gaseous products. NaP and KP crystallize in the novel orthorhombic NaP type (P 2₁2₁2₁; a = 603,8 pm; b = 564.3 pm; c = 1 014.2 pm and a = 650.0 pm; b = 601.6 pm; c = 1 128.8 pm; Z = 8, respectively) characterized by onedimensional infinite ¹∞(P^?) helices of covalent twofold bonded P-atoms with mean bond length P? P = 223.9 pm. The compounds can be described as Zintl-phases with M⁺ and P^? with respect to the structure. The range of existence of the NaP type and the LiAs type structure can be separated by the radii ratios. The volume increment for P^? is V(P^?) = 18.0 cm³mol^?1. For the bond energy E(P? P) in the monophosphides a value of 248 kJ · mol^?1 is calculated. The structures are discussed in detail together with related compounds.     

Bismalondialdehydverbindungen, 2. Mitt.: Darstellung und Reaktionen von Bipyrazolen und Biisoxazolen

Starting from 4-ethynyl-4H-pyrane-3,5-dicarbaldehyde (3 a) methane derivatives were obtained with substituents being five membered rings containing N-atoms—such as 4,4-dipyrazolylketone and 4,4-dipyrazolyl-4-triazolylmethane. Reactions of the new methane derivatives were studied.

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Viminolon,Strukturbeweis. Glykoside und Aglykone, 315. Mitteilung

Reduction of di-O-benzoyl-viminolon ( 1 ) with LiAlH₄ gave a mixture of 17-isopregn-5-ene-heptols. Treatment of this mixture with NaIO₄ produced the amorphous 12-O-formyl sarcostinketone (= 12-O-formyl-3β, 8β, 12β, 14β-tetrahydroxy androst-5-en-20-one) ( 4 ). This together with former results proves the structure of 1 .     

Funktionelle Monomere und Polymere. 37. Mitt. Zur Synthese und Polymerisation von Styrolderivaten,die Adenin und Cytosin enthalten

Ohne Zusammenfassung     

Funktionelle Monomere und Polymere. 37. Mitt. Zur Synthese und Polymerisation von Styrolderivaten, die Adenin und Cytosin enthalten

Ohne Zusammenfassung