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Facet Publication Year 1980 [X]
Facet section ZfN Section B [X]

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81	Author	Gerd Meyer	Requires cookie*
	Title	Halogen-Elpasolithe, VI [1] Erste Iod-Elpasolithe, Cs^M™^ (B 1 = Li, Na) Halo-Elpasolites, VI [1] The First Iodo-Elpasolites, Cs2B I M III I6 (Bi=Li, Na)
	Abstract	Some iodo elpasolites Cs2LiM m I6 (M 111 = Sc, Lu, Tm, Ho) and Cs2NaM I i I I6 (M»i = Sc, Lu, Tm, Er) have been prepared for the first time. According to Guinier-Simon X-ray powder photographs they belong to the elpasolite type structure (cubic K2NaAlF6-type and its tetra-gonal distorted variety: Cs2NaMIe) or to the Cs2LiGaF6-type structure (trigonal: Cs2LiMIe). The compounds Cs2LiTmX6 (X = CI, Br, I) are further characterized by Raman spectra and magnetic susceptibilities.
	Reference	Z. Naturforsch. 35b, 394—396 (1980); eingegangen am 28. November 1979
	Published	1980
	Keywords	Iodides, Elpasolites, Rare Earths
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	Identifier	ZNB-1980-35b-0394_n
	Volume	35

82	Author	Jürgen Evers, Gilbert Oehlinger, Armin Weiss	Requires cookie*
	Title	Einkristalldaten der Hochdruck- Hochtemperaturphase von BaGe2 Structural Refinement of the High Pressure - High Temperature Phase of BaGe2
	Abstract	A single crystal investigation of the high pressure -high temperature phase of BaGe2 (a-ThSi2 type of structure) has been performed. Space group I4i/amd has been derived from rotation, Weissenberg and precession photo-graphs. On a four-circle-diffractometer 1082 reflections with 0 < Ä < 8, 0 < fc < 8, 24 < Z < 24 have been measured with filtered Mo-radiation. This results in 296 independent reflections. Data of the complete structural analysis are sum-marized in Tabs. I and II. The final i?-values are = 6.09%, = 4.19%, 7?g = 4.95%.
	Reference	Z. Naturforsch. 35b, 397—398 (1980); eingegangen am 21. November 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0397_n
	Volume	35

83	Author	G. Rettig, H. P. Latscha	Requires cookie*
	Title	Die Reaktion von Antimon(V)-chlorid mit p-Benzoehinon The Reaction of Antimony(V) Chloride with p-Benzoquinone
	Abstract	2>-Benzoquinone, Antimony(V) Chloride The reaction of p-benzoquinone with an excess of SbCls gives 2,3,5,6 -tetrachloro -p -benzoquinone ("Chloranil") in high purity and almost quantitative yield. 2,6-and 2,5-dichloro-p-benzoquinone could be identified as inter-mediate products.
	Reference	Z. Naturforsch. 35b, 399—400 (1980); eingegangen am 5. Dezember 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0399_n
	Volume	35

84	Author	R. Battaglia, P. Mastropasqua, H. Kisch	Requires cookie*
	Title	Übergangsmetallkomplexe von Diazenen, XIV [1] Photochemische Darstellung und Reaktionen von (^ 1 -2.3-Diazanorbornen)Fe2(7y 5 -C5H5)2(CO)s Transition Metal Complexes of Diazenes, XIV [1] Photochemical Synthesis and Reactions of (^ 1 -2,3-Diazanorbornene)Fe2(^ 5 -C5H5)2(CO)3
	Abstract	Diazene Complexes Irradiation of (^ 5 -C5H5)2Fe2(CO)4 in the pres-ence of 2,3-diazanorbornene affords (^ 1 -2,3-diazanorbornene)-Fe2(?? 5 -C5H5)2(CO)3 (1) and small amounts of (^ 2 -2,3-diazanorbornene)Fe2-(7? 5 -C5H5)2(CO)2 (2). 1 is converted into 2 upon heating but not upon photolysis.
	Reference	Z. Naturforsch. 35b, 401—402 (1980); eingegangen am 18. Dezember 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0401_n
	Volume	35

85	Author	Dieter Brodalla, Rüdiger Kniep	Requires cookie*
	Title	(H30)[A13(H2P04)6(HP04)2] * 4 H20 - ein Al-O-P vernetztes Phosphat mit Oxoniumionen enthaltenden Hohlräumen (H30)[Al3(H2P04)6(HP04)2] * 4 H20 - a <g Al-O-P Linked Phosphate with Hollows Containing Oxonium Ions
	Abstract	The crystal structure of (H30)[Al3(H2P04)6(HP04)2] • 4 H20 contains layers consisting of AIOÖ octahedra which share vertices with 02P(0H)2 and 03P(0H) tetra-hedra. Within these layers there are vacancies (hollows) which are occupied by H30+ species. Water molecules are fixed between neigh-bouring layers by hydrogen bonds. The identity of some other related phosphates is discussed with respect to the crystal structure described in this paper.
	Reference	Z. Naturforsch. 35b, 403—404 (1980); eingegangen am 23. Oktober 1979
	Published	1980
	Keywords	Acid Aluminium Phosphates, Oxonium Ion, Crystal Structure
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	Identifier	ZNB-1980-35b-0403_n
	Volume	35

86	Author	Michael Davis	Requires cookie*
	Title	A Comment on the Paper "Benzo-U 4 , 2-thiazol, a New Bicyclic lOjr-System"
	Abstract	Heterocycle, 2,1-Benzisothiazole The "novel 107i-system" reported earlier is a 2,1-benzisothiazole, a well-known heterocyclic system.
	Reference	Z. Naturforsch. 35b, 405 (1980); received September 3 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0405_n
	Volume	35

87	Author	B. Thiele, W. Grunwald, D. Rink, Breitinger	Requires cookie*
	Title	G
	Abstract	Beim Druck wurden die Verbindungslinien in Tab. V weggelassen; die vervollständigte Tab. V sieht folgendermaßen aus: Tab. V. Korrelationsdiagramm für MT1C14 (M = K, Rb, TI)*. Raumgruppe I 4i/a-CV Z = 4, Z' = 2 (primitive Zelle).
	Reference	Z. Naturforsch. 35b, 406 (1980)
	Published	1980
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	Identifier	ZNB-1980-35b-0406_e
	Volume	35

88	Author	K. Barlos, H. Nöth	Requires cookie*
	Title	Beiträge zur Chemie des Bors, CIX [1] Neue Fünfringheterocyclen des Bors: Triazaborolidine mit Silicium, Phosphor uud Arsen als Ringglieder Contribution to the Chemistry of Boron, CIX [1] New Five-Membered Heterocycles of Boron: Triazaborolidines Containing Silicon, Phosphorus and Arsenic as Ring Atoms
	Abstract	l,2,4-Triaza-3-sila-5-borolidines, l,2,4-Triaza-3-phospha-5-borolidines, l,2,4-Triaza-3-arsa-5-borolidines, NMR Spectra l,2,4-Triaza-3-sila-5-borolidines (1) are accessible via N,N'-dilithio-N,N'-dimethyl-hydrazine and Br(CH3)B-NCH3-Si(CH3)2Br or by transsilylation of the permethyl derivative of 1. Similarly, phosphorus halides replace the (CH^Si group of heptamethyl-triaza-3-sila-5-borolidine (2), affording triaza-3-phospha-5-borolidines, while ASCI3 yields 3-chloro-l,2,4,5-tetrametbyl-l,2,4-triaza-3-arsa-5-borolidine. Nucleophilicreplacements at the P atom of 3-chloro-triaza-3-phospha-5-borolidine (9) are readily achieved. Surprisingly, the various substituents at the P atom of the new heterocyclic systems have little in-fluence on <5 n B, in contrast to 6 1 !!. This is attributed to n-and cr-effects. It is assumed that the new ring systems are nonplanar.
	Reference	Z. Naturforsch. 35b, 407—414 (1980); eingegangen am 30. November 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0407
	Volume	35

89	Author	Kleomenis Barlos, Heinrich Nöth	Requires cookie*
	Title	Beiträge zur Chemie des Bors, CX [1] Synthese und Reaktionen von Sila-und Phosphaborazinen Contributions to the Chemistry of Boron, CX [1] Synthesis and Reactions of Sila-and Phosphaborazines
	Abstract	Silaborazines, A 3 -Phosphaborazines, A 5 -Phosphaborazines, NMR Spectra The synthesis of permethylated silaborazines starting from Br(CH3)B-NCH3-Si(CH3)2Br or Br(CH3)B-NSi(CH3)3-Si(CH3)2Br is described. These may in turn be used to prepare phosphaborazines, since phosphorus halides replace selectively the sila group from the silaborazines. The P-Cl bond of P-chloro-pentamethylphosphaborazine is more reactive than the P-N and B-N bonds of the ring and allows selective nucleophilic substitution reactions at phosphorus. The NMR data of the new compounds suggest a nonplanar ring-configuration. Silaborazine
	Reference	Z. Naturforsch. 35b, 415—420 (1980); eingegangen am 14. Dezember 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0415
	Volume	35

90	Author	Udo Kunze, S.Budhi Sastrawan	Requires cookie*
	Title	Reaktivität metallorganischer Komplexe mit Zinn-Metall-Bindung, IV [1] S02 -Insertion an phosphinsubstituierten und anionischen Triorganozinn-Komplexen des Chroms, Molybdäns und Wolframs Reactivity of Organometallic Complexes Containing Tin-Metal Bonds, IV [1] SO2 Insertion into Phosphine Substituted and Anionic Triorganotin Complexes of Chromium, Molybdenum and Tungsten
	Abstract	The trans phosphane and phosphite substituted organotin complexes of molybdenum 1-4 are prepared by thermolysis or photolysis of the tricarbonyl parent compounds. The phosphane complexes 1 and 2 react readily with liquid sulfur dioxide by absorption of 1-3 moles of SO2 depending on temperature. IR and NMR spectra indicate cleavage of tin-carbon bonds only yielding insertion products of the sulfinato-0 type la-c and 2a-c. The phosphite complexes 3, 4 are less reactive and yield a di-insertion 3 a and a mono-insertion compound 4 a. The anionic triphenyltin derivatives of chromium, molybdenum and tungsten 5-7 undergo facile cleavage of 1 (Cr) or 3 (Mo, W) tin-phenyl bonds. The course of SO2 insertion into 1-7 reveals a distinct activation of the Sn-C bond in organotin transition metal complexes by substitution with stronger donor molecules or reduction to anionic species.
	Reference	Z. Naturforsch. 35b, 421—427 (1980); eingegangen am 14. November/28. Dezember 1979
	Published	1980
	Keywords	S02-Insertion, Organotin Complexes, Phosphane Ligand, Phosphite Ligand, Anionic Complexes
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	Identifier	ZNB-1980-35b-0421
	Volume	35

91	Author	Joseph Grobe, Michael Keil, Bernd Schneider, Heinz Zimmermann	Requires cookie*
	Title	Elektrochemische Synthesen, II [1] Theoretische Aspekte der elektrochemischen Synthese von Komplexen Electrochemical Syntheses, II [1] Theoretical Aspects of the Electrochemical Synthesis of Complexes
	Abstract	A theoretical model for the electrochemical synthesis of transition metal complexes in low oxidation states has been developed on the basis of Pearson's HSAB concept. A MO description is used to discuss the important practical implications of the model.
	Reference	Z. Naturforsch. 35b, 428—432 (1980); eingegangen am 17. Dezember 1979
	Published	1980
	Keywords	Electrochemical Synthesis, Metal Complexes, Low Oxidation States
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	Identifier	ZNB-1980-35b-0428
	Volume	35

92	Author	JohannW. Buchler, Kiong-Lam Lay, Harald Stoppa	Requires cookie*
	Title	Metallkomplexe mit Tetrapyrrol-Liganden, XXIV [1] Zur Kenntnis der Platin(IV)-Porphyrine Metal Complexes with Tetrapyrrole Ligands, XXIV [1] On the Knowledge of Platinum(IV) Porphyrins
	Abstract	The first platinum(IV) porphyrin, dichloromeso-tetra(jo-tolyl)porphinatoplatinum(IV) [Pt(TPP)Cl2], is prepared by oxidation of the corresponding platinum(II) complex [Pt(TTP)] with hydrogen peroxide in acidic media and treatment with hydrogen chloride. Pt(TTP)Cl2 is thermally stable up to 200 °C. Electrochemical reduction yields Pt(TTP), presumably by a two-electron step. The platinum-to-porphyrin jr-backbonding known to exist in Pt(TTP) decreases on oxidation to Pt(TTP)Cl2 but does not vanish. An improved synthesis of Pt(TTP) is described. Evidence for the accessibility of Pt(OEP)Cl2 and Pd(TTP)Cl2 is also presented.
	Reference	Z. Naturforsch. 35b, 433—438 (1980); eingegangen am 7. Januar 1980
	Published	1980
	Keywords	Platinum Porphyrins, Palladium Porphyrins, Electronic Absorption Spectra, Electrochemistry of Metalloporphyrins
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	Identifier	ZNB-1980-35b-0433
	Volume	35

93	Author	Bernd Wrackmeyer	Requires cookie*
	Title	Vergleich zwischen n B-und 13 C-chemischen Verschiebungen dreifach koordinierter Borverbindungen und Carbenium-Ionen Comparison between n B and 13 C Chemical Shifts of Three-Coordinate Boron Compounds and Carbenium Ions
	Abstract	The relationship between U B chemical shifts (<5 n B) of trigonal boranes and 13 C® chemical shifts (<5 13 C®) of carbenium ions was found to be more complex than previously reported. The trends observed allow for the comparison of (pp) n bonding between boron and suitable substituents with the TT-charge derealization in carbenium ions. In case of the ferrocenyl boranes and ferrocenyl carbenium ions the markedly different trend in the shielding of 11 B and 13 C® favours a fulvene-like structure for the substituted cyclopenta-dienyl ring in the latter. Structural features are analogously reflected by <5 U B and d 13 C® data for both series of compounds. Comparison of <5 13 C data of organoboranes and carbe-nium ions can be useful in conformational studies. Einführung
	Reference	Z. Naturforsch. 35b, 439—446 (1980); eingegangen am 5. November/14. Dezember 1979
	Published	1980
	Keywords	Boranes, Carbenium Ions, 13 C NMR Spectra, U B NMR Spectra
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	Identifier	ZNB-1980-35b-0439
	Volume	35

94	Author	Heinz-Gerhard Köhn, Anton Melier	Requires cookie*
	Title	Zur Chemie des l-Aza-2-bora-3-oxacyclopentansystems The Chemistry of the l-Aza-2-bora-3-oxacyclopentane System
	Reference	Z. Naturforsch. 35b, 447—453 (1980); eingegangen am 15. Oktober/10. Dezember 1979
	Published	1980
	Keywords	l-Aza-2-bora-oxacyclopentanes, Dimers and Trimers, B-Silylamino Derivatives, Bis(trimethylsilyl)ethanolamines
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	Identifier	ZNB-1980-35b-0447
	Volume	35

95	Author	Georg Süß-Fink	Requires cookie*
	Title	N-H-Aktivierung an Os3 -Clustern
	Abstract	Darstellung und Charakterisierung von Os3(CO)n(NH3), Os3(CO)n(NHC6H10) und OS3(CO)10(/,-H)(/,-NC6H10) N-H Activation on 0s3 Clusters. Preparation and Characterization of Os3(CO)n(NH3), Os3(CO)n(NHC6Hi0) and Os3(CO)io(^-H)(/a-NC6Hio) The ammonia complex Os3(CO)N(NH3) was prepared by aminoxide induced carbonyl substitution of Os3(CO)I2. Upon heating one hydrogen atom in Os3(CO)N(NH3) is trans-ferred onto the metal frame to yield the complex OS3(CO)IO(JU-H)(/^-NH2). Reaction of OS3(CO)H(NH3) with cyclohexanone affords the ketimine complex Ös3(CO)N(NHC6HIO), which can be transformed thermally into Os3(CO)io(/I-H)(i«-NC6Hio). The N-H bond of the ketimine ligand is activated under milder conditions than that of the ammonia ligand.
	Reference	Z. Naturforsch. 35b, 454—457 (1980); eingegangen am 27. Dezember 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0454
	Volume	35

96	Author	Shinzi Kato, Shunji Yamada, Hideyuki Goto, Kiyomitsu Terashima, Masateru Mizuta, Tomonori Katada	Requires cookie*
	Title	A Convenient Preparation Method of Anhydrous Lithium, Potassium, Rubidium and Cesium Dithiocarboxylates
	Abstract	Anhydrous Alkali Metal Dithiocarboxylates, Metal Hydride It has been found that a series of anhydrous alkali metal dithiocarboxylates are readily obtained in good yields by the reaction of dithio acid with metal hydride (LiH, NaH, KH), n-butyl lithium, or rubidium or cesium acetates, respectively. Their spectral data were compared.
	Reference	Z. Naturforsch. 35b, 458—462 (1980); received December 7 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0458
	Volume	35

97	Author	DavidW. Allen, J. David, BarrieG. Buckland, Hutley	Requires cookie*
	Title	Electronic Effects of Aryl and Heteroaryl Groups on the Rate of Nucleophilic Displacement of Chlorine from 5-Heteroaryl(or Aryl)-2-chloropyrimidines by Piperidine
	Abstract	The kinetics of nucleophilic displacement of chlorine from a series of 2-chloro-5-hetero-aryl(or aryl)pyrimidines by piperidine have been studied in order to assess the electronic effects of the 5-substituent. The observed order of reactivity is 5-(l-methylpyrrol-2-yl) < 5-7>-anisyl < 5-f>-tolyl < 5-phenyl < 5-(2-thienyl) < 5-(2-furyl) < 5-(m-chlorophenyl). The reactions are enthalpy-controlled and the rate data can be explained as a consequence of the electron-withdrawing or electron-donating ability of the 5-substituent. Synthetic routes to the compounds studied are also described.
	Reference	Z. Naturforsch. 35b, 463—467 (1980); received November 19 1979
	Published	1980
	Keywords	5-Substituted Pyrimidines, Nucleophilic Displacement, Kinetic Studies, Heteroaryl Substituents
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	Identifier	ZNB-1980-35b-0463
	Volume	35

98	Author	DavidW. Allen, DavidJ. Buckland, BarrieG. Hutley	Requires cookie*
	Title	Electronic Effects of Aryl and Heteroaryl Groups on the Rate of Quaternization of 5-Aryl(or Heteroaryl)pyrimidines
	Abstract	5-Substituted Pyrimidines, Quaternization Reactions, Kinetics, Heteroaryl Substituents The kinetics of quaternization of a series of 5-aryl-and 5-heteroarylpyrimidines with phenacyl bromide in acetonitrile have been studied in order to assess the electronic effects of the 5-substituent. The observed order of reactivity is 5-(l-methylpyrrol-2-yl) > 5-p-anisyl >5-(2-furyl) >5-p-tolyl > 5-(2-thienyl) >phenyl > 5-(m-chlorophenyl). The reactions are enthalpy controlled and the rate data can be accounted for in terms of the electron-withdrawing or donating ability of the 5-substituent. The substituent effects of the 2-fury 1-and 2-thienyl groups in the above reaction are significantly different from those observed in the piperidinolysis of 2-chloro-5(2-heteroaryl)pyrimidines.
	Reference	Z. Naturforsch. 35b, 468—470 (1980); received November 19 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0468
	Volume	35

99	Author	Shozi Yamashita, Giiti Tomita	Requires cookie*
	Title	The Recombination Luminescence of Tryptophan in Aqueous Glasses, I Quenching Effect of Electron Scavengers
	Abstract	Recombination Luminescence, Tryptophan, Trapped Electron, Electron Scavenger The quenching effect of Se(>4— and NO3 -(scavenger for trapped electrons) on the delayed luminescence ('recombination luminescence') caused by the recombination of trapped electrons with mother tryptophan cations was investigated in aqueous 9 M NaOH and 9.5 M LiCI glasses at 77 K. The results show that the trapped electrons responsible for the recombination fluorescence were deep-trapped ones in 9 M NaOH glasses and shallow-and deep-trapped ones in 9.5 M LiCI glasses. However, trapped electrons participating in the recombination phosphorescence were almost shallow-trapped ones in the two glasses. The distribution of the trapped electrons is discussed.
	Reference	Z. Naturforsch. 35b, 471—474 (1980); received July 18/December 21 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0471
	Volume	35

100	Author	WolfgangW. Schoeller», U. H. Brinker	Requires cookie*
	Title	Towards a Classification of Singlet Carbenes
	Abstract	Olefines, Singlet Carbenes According to one-electron perturbation theory singlet carbenes can be classified as (a) electrophilic, (b) nucleophilic or (c) ambiphilic in their addition properties towards olefines. The nucleophilicity of the cr-orbital in :CXiX2 should increase with decreasing electronegativity of Xi (X2).
	Reference	Z. Naturforsch. 35b, 475—476 (1980); received July 6/November 7 1979
	Published	1980
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	Identifier	ZNB-1980-35b-0475
	Volume	35

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