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41	Author	Teresa Borowiak3, Irena Wolska3, Herbert Mayrb, Janusz Baranc	Requires cookie*
	Title	X-Ray Structure4]non-2-ene
	Abstract	of 6(is)-[2(Z)-(Hydroxyimino)-2-phenylethyIidene]-7,7,8,8,9,9-hexamethyl-3-phenyl-l,2-oxazaspiro[4. The X-ray crystallographic structure of the title compound, a product of a 1,3-dipolar cy cloaddition reaction of benzonitrile oxide to 3,3,4,4,5,5-hexamethyl-l,2-bis(methylene)cyclo-pentane, has been determined. Colourless plates crystallize in the orthorhombic space group Pbca with cell dimensions a = 13.698(2), b = 11.836(2), c = 29.157(4) A, V= 4727.2(1.2)A3, Z = 8, 3736 reflections, final R(F) = 0.063 and wR(F2) = 0.166. The crystals are racemic, the molecules of opposite chirality form centrosymmetric dimers via intermolecular hydro gen bonds O-H -N between their oxime groups. The molecules are highly strained and the geometrical consequences of the steric strain are discussed.
	Reference	Z. Naturforsch. 56b, 354—358 (2001); received November 27 2000
	Published	2001
	Keywords	1, 3-Dipolar Cycloaddition Product, Oxime, Isoxazoline
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	TEI-XML for	default:Reihe_B/56/ZNB-2001-56b-0354.pdf
	Identifier	ZNB-2001-56b-0354
	Volume	56

42	Author	S.	Requires cookie*
	Title	Strahlenchemische Cycloadditionen mit Äthylen und Acetylen (Produktbildung und Lösungsmittelwahl)
	Abstract	R a d ia tio n Chemical C ycloaddition Reactions w ith Ethylene and Acetylene M a n f r e d J . M i r e a c h 1, M a r l i s F. M i r b a c h 1 u n d A l f o n s S a u The (2 + 2) cycloadditions of maleic acid anhydride (MSA) and 1,3-cyclohexadiene (CHD) to ethylene and acetylene were initiated with gamma-rays in different solvents. The four-membered ring products were formed with high selectivity and surprisingly high energy yields in solvents with triplett energies smaller than ethylene and acetylene but higher than MSA and CH D resp. In benzonitrile as a solvent MSA reacts with ethylene to give cyclobutane-l,2-dicarboxylic acid anhydride (1) (G = 0.04) and with acetylene to give cyclobut-3-ene-l,2-dicarboxylic acid anhydride (2) (G = 3.7). The cyclobutene derivative (2) is formed in >80% yield and the bicyclopropyl derivative (3), which is the main product in the photochemical reaction, with a yield of <20%. 1,3-Cyclohexadiene was also added to ethylene to give bicyclo(4,2,0)oct-2-ene (G = 0.4) and bicyclo(2,2,2)oct-2-ene (G = 0.1) under gamma irradiation in methylnaphthalene as a solvent. Under similar conditions addition to acetylene gave bicyclo(4,2,0)octa-2,7-diene (G = 0.04) and bicyclo(2,2,2)octa-2,5-diene (G = 0.3), respectively.
	Reference	(Z. Naturforsch. 32b, 281—284 [1977]; eingegangen am 6. Oktober 1976)
	Published	1977
	Keywords	Cycloaddition, Ethylene, Acetylene, Maleic Acid Anhydride, 1, 3-Cyclohexadiene
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	TEI-XML for	default:Reihe_B/32/ZNB-1977-32b-0281.pdf
	Identifier	ZNB-1977-32b-0281
	Volume	32

43	Author	Gerd-Volker Röschenthaler	Requires cookie*
	Title	Über die Reaktionen von Phosphanen MenP [OCH(CF3 )2] 3_" mit Hexafluoraceton Reactions of Phosphanes MenP[OCH(CF3)2]3-n with Hexafluoroacetone
	Abstract	The stable phosphanes Me2POCH(CF3)2 and MeP[OCH(CF3)2]2 have been prepared and reacted with hexafluoroacetone yielding 1,2-oxaphosphetanes. The analogous reaction with Me2PF was carried out giving a 1 : 1 : 1 mixture of a 1,3,2-, a 1,3,4-dioxaphospholane, and a 1,2-oxaphosphetane. P[OCH(CF3)2]3 did not react with hexafluoroacetone. The new compounds were characterized by NMR, mass spectrometry and elemental analysis.
	Reference	Z. Naturforsch. 33b, 131—135 (1978); eingegangen am 12. September 1977
	Published	1978
	Keywords	Dimethylhexafluoroisopropoxyphosphane, Methyl-bis(hexafluoroisopropoxy)phosphane, 1, 2-Oxaphosphetanes, Oxyphosphoranes, Hexafluoroacetone
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	TEI-XML for	default:Reihe_B/33/ZNB-1978-33b-0131.pdf
	Identifier	ZNB-1978-33b-0131
	Volume	33

44	Author	Krystyna Lesiak, WojciechJ. Stec	Requires cookie*
	Title	The Stereochemistry of P-N Bond Cleavage in the Staudinger -Wittig-type Reaction of 2-Anilido-3,4-dimethyl-5-phenyl-l,3,2-oxazaphospholidine-2-thiones
	Abstract	Both isomers of 2-anilido-3,4-dimethyl-5-phenyl-l,3,2-oxazaphospholidine-2-thiones (2 a and 2 b) derived from (—)ephedrine were obtained and converted to corresponding 2-thiomethyl derivatives (3 a and 3 b). The Staudinger-Wittig-type reaction of P-N bond cleavage was found to proceed with full retention of configuration at P-atom involved into five-membered ring system.
	Reference	Z. Naturforsch. 33b, 782—785 (1978); received March 28 1978
	Published	1978
	Keywords	1, 3, 2-Oxazaphospholidines, (—)Ephedrine, Thioanilides, Thioesters, Stereochemistry
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	TEI-XML for	default:Reihe_B/33/ZNB-1978-33b-0782.pdf
	Identifier	ZNB-1978-33b-0782
	Volume	33

45	Author	W. L. Driessen, P.L A Everstijn	Requires cookie*
	Title	Metal(II) Complexes of 1,2,5-Oxadiazole
	Abstract	A series of new coordination compounds is reported with 1,2,5-oxadiazole (ODZ) as the ligand, viz. [M(ODZ)3](SbCl 6)2 with M = Mg(II), Mn(U), Fe(II), Co(II), Ni(II), and Zn(II). The metal ions are in a regular octahedral environment of six nitrogen atoms. The ligands function as bidentate bridges between the metal ions.
	Reference	Z. Naturforsch. 33b, 1120—1123 (1978); received June 12 1978
	Published	1978
	Keywords	Transition Metal Ions, 1, 2, 5-Oxadiazole, Ligand Field Spectra, IR
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	Identifier	ZNB-1978-33b-1120
	Volume	33

46	Author	Heinz-Peter Schuchmann, Heinz Bandmann, Clemens Von Sonntag	Requires cookie*
	Title	The 185 nm Photolysis of 1,4-Dioxane in the Liquid Phase
	Abstract	The main products in the 185 nm photolysis of neat 1,4-dioxane are formaldehyde (0 = 0.25), glycol monovinyl ether (0.17), and ethylene (0.15). Some hydrogen (0.04), carbon monoxide (0.01), acetaldehyde (0.03), oxetane (0.04), and bidioxanyl (0.01) are also formed. On N20-saturation, the quantum yields of these products are diminished by about 30%, and N2 (0.59) and hydroxydioxane (0.4) become the main products. They are thought to be formed in the reaction sequence hv dioxane > • dioxane* dioxane* + N20 > • dioxane + N2 + O O + dioxane > • hydroxydioxane In aqueous dioxane, photoionisation is possible due to a greater lowering of the ionisa-tion threshold. In dioxane/water 20:80 the main products are H2 (0.50) and bidioxanyl (0.45), most likely formed in consequence of (dioxane)aq (dioxane)aq + eäq (dioxane)Jq • (dioxane-H)-+ H+ eäq + H+ > H-H-+ dioxane >-H2 + (dioxane-H)-2 (dioxane-H)- • bidioxanyl
	Reference	Z. Naturforsch. 34b, 327—332 (1979); received October 6 1978
	Published	1979
	Keywords	Photolysis, 1, 4-Dioxane, Photoionisation, Energy Transfer, Quantum Yields
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	Identifier	ZNB-1979-34b-0327
	Volume	34

47	Author	Richard Goetze, Heinrich Nöth	Requires cookie*
	Title	Zur Kenntnis von 1.3.2-Dithiaborolen [2] Contributions to the Chemistry of Boron, 112 [1] 1,3,2-Dithiaboroles [2]
	Abstract	Several methods were used to prepare a series of boron substituted 1,3,2-dithiaborols. The NMR data of this new class of compounds indicate in comparison to 1,3,2-dithia-borolanes, that the heterocycle can be looked at as a 6 jt-electron system. A high degree of analogy in the mass spectrometric fragmentation of dithiaborolanes and dithiaborols exists, however, the parent ion of 2-methyl dithiaborol is more stable than that of the saturated analogon.
	Reference	Z. Naturforsch. 35b, 1212—1221 (1980); eingegangen am 30. Januar 1980
	Published	1980
	Keywords	1, 3, 2 -Dithiaboroles, n B NMR Spectra, 13 C NMR Spectra
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	Identifier	ZNB-1980-35b-1212
	Volume	35

48	Author	Herbert Meier, Johannes Zountsas, Oswald Zimmer	Requires cookie*
	Title
	Abstract	A X H and 13 C NMR spectroscopical study is performed on the basis of 37 1,2,3-selena-diazoles. Besides the discussion of chemical shifts and coupling constants of X H and 13 C, selenium satellites were measured providing 1 H 77 Se and 13 C 77 Se coupling constants.
	Reference	Z. Naturforsch. 36b, 1017—1022 (1981); eingegangen am 16. April 1981
	Published	1981
	Keywords	NMR Spectra, 1, 2, 3-Selenadiazoles, 77 Se Coupling
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	TEI-XML for	default:Reihe_B/36/ZNB-1981-36b-1017.pdf
	Identifier	ZNB-1981-36b-1017
	Volume	36

49	Author	Udo Plücken, Herbert Meier	Requires cookie*
	Title	Lanthanide Induced Shifts in the »H and 13 C Nuclear Magnetic Resonance Spectroscopy for Structure Elucidations of Thiadiazole Oxides
	Abstract	A systematic investigation of the LIS-method for structure elucidations is performed on the basis of thermally generated monoxides of 1,2,3-thiadiazoles. A calculation process for the evaluation of lanthanide induced shifts according to the McConnell-Robertson equa-tion was developed. The program can be applied to underdetermined systems with fewer variables than chemically not equivalent X H plus 13 C nuclei. A quality criterium for the method is given by 4-phenyl-l,2,3-thiadiazole-3-oxid -wellknown by an X-ray analysis.
	Reference	Z. Naturforsch. 36b, 1305—1314 (1981); eingegangen am 21. Aprü 1981
	Published	1981
	Keywords	1, 2, 3-Thiadiazole-oxides, LIS Measurements, LIS Computer Program
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	Identifier	ZNB-1981-36b-1305
	Volume	36

50	Author	Waldemar Adam, Omar Cueto	Requires cookie*
	Title	3,3-Dimethyl-4 [2-methyl-l-propenyl] -1,2-dioxetane: Its Thermal Stability and Chemiluminescent Properties
	Abstract	The alkenyl-substituted 1,2-dioxetane (1) was prepared by photosensitized singlet oxygenation of 2,5-dimethyl-2,4-hexadiene and its activation and excitation parameters determined. It is shown that dioxetane (1) is comparable in its thermal stability to alkyl-substituted dioxetanes and an inefficient chemical source of electronic excitation.
	Reference	Z. Naturforsch. 36b, 1653—1654 (1981); received June 29 1981
	Published	1981
	Keywords	1, 2-Dioxetanes, Chemüuminescence, Activation Parameters, Excitation Yields, Solvent Effects
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	Identifier	ZNB-1981-36b-1653
	Volume	36

51	Author	Elli Theodoridou, Pantelis Karabinas, Dimitrios Jannakoudakis	Requires cookie*
	Title	Elektrochemisches Verhalten der Nitrophenole und ihrer Reduktionsprodukte an Graphitelektroden, II Mechanismus und Kinetik Electrochemical Behavior of the Nitrophenols and their Reduction Products at Graphite Electrodes, II Mechanism and Kinetic
	Abstract	The mechanism of the electrochemical reactions of l-nitro-2-naphthol, o-nitrophenol and p-nitrophenol at carbon fibre electrodes is investigated in aqueous solutions with pH= 1-10. The above nitrophenols are reduced to the corresponding amines, which are reoxidized to quinone imines. As the quinone imines are partially hydrolysed to quinones, the kinetic of this hydrolysis reaction is also examined. In the case of l-nitro-2-naphthol the hydrolysis rate constant of 1,2-naphthoquinone imine is estimated as a function of pH by cyclic voltammetry.
	Reference	(Z. Naturforsch. 37b, 97—101 [1982]; eingegangen am 14. September 1981)
	Published	1982
	Keywords	Cyclic Voltammetry, Graphite Electrodes, o-Nitrophenol, 1, 2-Naphthoquinoneimine
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	TEI-XML for	default:Reihe_B/37/ZNB-1982-37b-0097.pdf
	Identifier	ZNB-1982-37b-0097
	Volume	37

52	Author	Cornelia Lensch, Oskar Glemser	Requires cookie*
	Title	Darstellung und Reaktionen von S.N-Bi8(heptafluorisopropyl)schwefelfluoridimid Preparation and Reactions of S,N-Bis(heptafluoroisopropyl)sulphurfluoride Imide
	Reference	Z. Naturforsch. 37b, 401—403 (1982); eingegangen am 8. Dezember 1981
	Published	1982
	Keywords	Sulphur-amide, N-hexafluoroisopropyl, S -[2 -chlorine-1, 1, 1, 3, 3, 3 -hexafluoro]isopropyl, Sulphurfluoride-imide, N-heptafluoroisopropyl, S-[2-chlorine-l, l, l, 3, 3, 3-hexafluoro]isopropyl, Sulphur-imide, N-heptafluoroisopropyl, S-dimethoxy
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	TEI-XML for	default:Reihe_B/37/ZNB-1982-37b-0401.pdf
	Identifier	ZNB-1982-37b-0401
	Volume	37

53	Author	Martin Hoch, Dieter Rehder	Requires cookie*
	Title	Carbonylniobium Chemistry, IV [1] Derivatives of ^ 5 -C5H5Nb(CO)4 with Tridentate Phosphines
	Abstract	The photo-induced reaction between CpNb(CO)4 and Ph2P(CH2)2PR(CH2)2PPh2 (L; R = Ph, Cy) yields the chelated five-membered ring complexes cis-[CpNb(CO)2L] (two isomers in the case of R = Cy). The uncordinated PPI12 group reacts with CpNb(CO)3THF to form CpNb(CO)2(ia-L)CpNb(CO)3. IR, 31 P and 93 Nb NMR spectra are discussed and compared with corresponding data of the analogous vanadium complexes.
	Reference	Z. Naturforsch. 38b, 446—448 (1983); received December 17 1982
	Published	1983
	Keywords	Carbonylniobium, 1, 4, 7-Triphosphaheptanes, 31 P NMR, 93 Nb NMR
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	TEI-XML for	default:Reihe_B/38/ZNB-1983-38b-0446.pdf
	Identifier	ZNB-1983-38b-0446
	Volume	38

54	Author	Hans-Ulrich Höfs, Rüdiger Mews, Mathias Noltemeyer, GeorgeM. Sheldrick, Martin Schmidt, Gerald Henkel, Bernt Krebs	Requires cookie*
	Title	Reactions of Fluorinated Nitriles with Sulphur(II) Chlorides; Crystal Structure of 2,4,6-Tris(difluorosulphoximido)-l,3,5-triazene at 170 K
	Abstract	The addition of CF3SC1 (2) to the fluorinated nitriles RfCN[Rf = CF3 (3), NSF2 (4), NSOF2 (5)] leads to N-perfluoromethanesulphenyl-formylimidoylchlorides CF3S-N = C(C1)/?/ (6, 11, 12). From the reactions of SC12 (1) with (3) and (5), which yielded the N-sulphenyl-chlorides C1S-N = C(C1)-R/ (7, 13), it proved possible also to isolate the oxidation product [CF3CC12NSC12 (8)] and an oligomer of the nitrile [(NCNSOF2)3 (14)]. Dechlorination of 7 with Hg gives the corresponding di-and tri-sulphides (CF3C(Cl) = N-)2Sa; (9, 10, x — 2, 3). Crystals of (14) are triclinic with a = 1133.6(5), b = 1332.6(5), c = 1715.1(8) pm, a = 109.31(3), ß = 105.30(3), y = 97.84(3)° at 170 K, Z = 8, space group P I. The structure was refined to R = 0.028 for 8290 diffractometer data with F > 4cr(F). The four crystallo-graphically independent molecules adopt similar unsymmetrical conformations. N-Sulphenylacetimidoyl halides of the type RC(X)=N-S-Y are important in preparative chem-istry for several reasons: (a) When Y is a halogen, it may be readily exchanged, leading to a chemistry analogous to that of the perhaloalkylsulfenylhalides RhaiSCl [1, 2]. Examples of such substitution reac-tions have already been reported [2, 3], (b) When the substituent X on the triply-coordinated carbon is a halogen, the -M effect of the imino-nitrogen facilitates nucleophilic attack. Hard nucleophiles (fluoride, alcohols, amines) tend to replace X [4], soft nucleophiles the sulphur-substituent Y. (c) The >C=N-S-system may be regarded as a shortened diene, in which the second double bond is replaced by the oxidisable sulphur atom; instead of the usual 1,4-addition this results in 1,3-addition with simul-taneous oxidation of the sulphur [5]. One of the simplest examples of this class of com-pounds , chlorosulphenylchloroformylimidoylchloride may be prepared in several ways; the synthesis [6] from C1CN and SC12 opens a general route to the N-sulphenylimidoyl derivatives [4, 7-9]: C1CN + SC12 C1S-N=CC12 1 RCN + R'SCl -> R'S-N=CC1R 2 * Reprint requests to Prof. R. Mews. 0340-5087/83/0400-0454/$ 01.00/0 We report here an investigation of the corresponding addition of CF3SCI and SC12 to the fluorinated nitriles N = C-CF3, N = C-NSF2 and N = C-NSOF2. Experimental
	Reference	Z. Naturforsch. 38b, 454—459 (1983); eingegangen am 8. November 1982
	Published	1983
	Keywords	Crystal Structure, Perfluoromethanesulphenylformylimidoylchlorides, N-Sulphenylchlorides, 1, 3, 5 -Triazenes
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	TEI-XML for	default:Reihe_B/38/ZNB-1983-38b-0454.pdf
	Identifier	ZNB-1983-38b-0454
	Volume	38

55	Author	M. Torres, A. Clement, 0. P. Strausz	Requires cookie*
	Title	Argon-Matrix Isolation of Bis(carbomethoxy)thiirene: Formation of Acyl and Carbalkoxythioketenes
	Abstract	Photolysis of argon-matrix isolated 4,5-bis(carbomethoxy)-l,2,3-thiadiazole with A = 254 or 265 nm resulted in the almost quantitative formation of bis(carbomethoxy)-thiirene (3g). Photolysis of 3g could only be carried out by long irradiation times at short wavelength A = 210nm and resulted mainly in extensive fragmentation instead of the formation of bis(carbomethoxy)thioketene, confirming earlier predictions that substituents, especially electron-withdrawing ones, should stabilize the thiirene ring. Methylcarboethoxy and methylacetylthioketene were obtained, however, in the argon-matrix photolysis or flow thermolysis of 4-methyl-5-carboethoxy-or 4-carboethoxy-5-methyl-l,2,3-thiadiazole and 4-acetyl-5-methyl-l,2,3-thiadiazole, respectively.
	Reference	Z. Naturforsch. 38b, 1208—1212 (1983); received June 6 1983
	Published	1983
	Keywords	Thiirene, Thioketene, 1, 2, 3-Thiadiazole, Thio-Wolff Rearrangement
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	TEI-XML for	default:Reihe_B/38/ZNB-1983-38b-1208.pdf
	Identifier	ZNB-1983-38b-1208
	Volume	38

56	Author	Susanna Kerschl, Bernd Wrackmeyer	Requires cookie*
	Title	Organoborierung von Alkinylstannanen, XIV [1]
	Abstract	Organoborierung von Bis(alkinyl)stannanen: Mechanismus und Anwendung der 119Sn—NMR-Spektroskopie O rganoboration of Alkynylstannanes, XIV [1] O rganoboration of Bis(alkynyl)stannanes: M echanism and Application of 119Sn NM R Spectroscopy Dimethylbis(phenylethynyl)stannane (1) reacts with trialkylboranes, BR3 (2), to give bis(al-kenyl stannanes (5) (R = C2H5), l-bora-4-stanna-2,5-cyclohexadienes (6) (R = C2H5, C3H7'), 1-stanna-2,4-cyclopentadienes (7) (R = C2H5) and l-stanna-3-cyclopentenes (8) (R = CH3, C2H5). I3C and uySn NMR data prove the structure of the reaction products (5 to 8). 119Sn NMR is useful (i) for following the course of the reaction (mechanism!) and (ii) for quantitative analysis of the product distribution. Deorganoboration reactions play an important role in the formation of the various heterocyclic systems.
	Reference	Z. Naturforsch. 39b, 1037—1041 (1984); eingegangen am 24. Februar 1984
	Published	1984
	Keywords	et Alkynylstannanes, Organoboration, Mechanism, 1, ySn NMR Spectra, 13C NMR Spectra
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	TEI-XML for	default:Reihe_B/39/ZNB-1984-39b-1037.pdf
	Identifier	ZNB-1984-39b-1037
	Volume	39

57	Author	Christa Pomp, Stefan Drüeke, Heinz-Josef Küppers, Karl Wieghardt, Carl Krüger, Bernhard Nuber, Johannes Weiss	Requires cookie*
	Title	Synthese
	Abstract	von [LRe(CO) 3 ] + -Komplexen mit makrocyclischen Liganden Die Kristallstrukturen von 1,4,7-TriazacycIononan-tricarbonyl-rhenium(I)-thiocyanat und 1,4,7-Trithiacyclononan-tricarbonyl-rhenium(I) -bromid-hemihy drat Synthesis of [LRe(CO) 3 ]" Complexes with Macrocyclic Ligands The Crystal Structures of l,4,7-Triazacyclononane-tricarbonyl-rhenium(I) Thiocyanate and of l,4,7-Trithiacyclononane-tricarbonyl-rhenium(I) Bromide Hemihydrate The tridentate macrocyclic ligands 1,4,7-triazacyclononane, its thia analogue 1,4.7-trithia-cyclononane, l-oxa-4,7-diazacyclononane, and N,N',N"-trimethyl-l ,4,7-triazacyclononane react with Re(CO) 5 Br in dimethylformamide to yield colorless, air-stable [LRe(CO) 3 ]Br complexes (L = tridentate macrocycle). With Mn(CO) 5 Br only the cyclic amines react to af-ford yellow-orange [LMn(CO),]Br complexes whereas 1.4,7-trithiacyclononane does not give stable complexes of manganese. The crystal structures of [([9]aneN 3)Re(CO) 3 ](NCS) and [([9]aneS 3)Re(CO) 3 ]Br-1/2 H : 0 have been determined. The former crystallizes in the orthorhom-bic space group Pbca (a = 12/763(4), b = 12.662(5), c = 17.472(9) Ä; Z = 8); whereas the latter crystallizes in the monoclinic space group P2,/c (a = 9.444(1). b = 11.797(2), c = 28.095(3) Ä. ß = 90,86(1); Z = 8).
	Reference	Z. Naturforsch. 43b, 299—305 (1988); eingegangen am 9. Oktober 1987
	Published	1988
	Keywords	Crystal Structure, 1, 4, 7-Triazacyclononane 1, 47-Trithiacyclononane Complexes
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	Identifier	ZNB-1988-43b-0299
	Volume	43

58	Author	Rene Csuk, BrigitteI. Glänzer	Requires cookie*
	Title	Biocatalytical Transformations, III [1] Regioselective Enzymic Deacetylations of Laevoglucosane Triacetate
	Abstract	Several hydrolytic enzymes (porcine liver esterase, lipase from wheat germ type I, and the lipase from rhizopus javanicus) efficiently deacetylate laevoglucosane triacetate (2) with good re-gioselectivity into diacetylated laevoglucosane derivatives (3—5).
	Reference	Z. Naturforsch. 43b, 1355—1357 (1988); received June 3 1988
	Published	1988
	Keywords	1, 6-Anhydro Sugar, Laevoglucosane Triacetate, Deacetylation, Enzymes, Lyophilized Yeast
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	Identifier	ZNB-1988-43b-1355
	Volume	43

59	Author	G.Erhard Himbert, Dieter Faul, Michael Barz	Requires cookie*
	Title	Cycloadditionen, XIX [1] Umsetzungen von Butadiinyl-und Hexatriinyl-amin-Derivaten mit Nitriloxiden Cycloadditions, XIX [1] Reactions of Butadiynyl-and Hexatriynyl-amine Derivatives with Nitrile Oxides
	Abstract	Butadiyn-and hexatriynamines l a -g , bearing silyl-, trichlorvinyl-and amino groups, resp. in the co-position o f their acetylenic system add nitrile oxides 3 at their first C/C-triple bond to give the 5-am inoisoxazoles 4, whereas the analogous oligoynam ines 11—1, bearing a hydrogen in the co-position, add the nitrile oxides 3 at their terminal C/C-triple bond to give the
	Reference	Z. Naturforsch. 46b, 955 (1991); eingegangen am 15. N ovem ber 1990
	Published	1991
	Keywords	Butadiynyl-, Hexatriynyl-amines, Isoxazoles, Cycloaddition, 1, 3-Addition, Cyclization
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	Identifier	ZNB-1991-46b-0955
	Volume	46

60	Author	Michael Feist, Sergej Trojanov, Erhard Kemnitz	Requires cookie*
	Title	Die Kristallstrukturen von 1,4-Dimethylpiperazinium-tetrabromo- cobaltat(II) und -zinkat(II), (dmpipzH2) [Mn Br4] (M = Co, Zn)
	Abstract	The Crystal Structures of 1,4-Dimethylpiperazinium Tetrabromocobaltate(II) and -Zincate(II), (dmpipzH2) [MHBr4] (M = Co, Zn) The compounds (dmpipzH2)[MnBr4] (M = Co, Zn) crystallize at room temperature from equi-molar solutions of 1,4-dimethylpiperazine and MBr2 • n H20 in 3M HBr. (dmpipzH2)[CoBr4] is isotypic with the homologous chlorometalates of Co and Zn and crystallizes in the mono clinic space group P2,/m with a = 6.424(3), b = 14.588(6), c = 7.102(6) A, ß = 90.87(6)°, Z = 2. (dmpipzH2)[ZnBr4], however, crystallizes in the monoclinic space group P2,/c with a = 7,605(5), b = 13,760(9), c = 13,286(7) Ä, ß = 93,03(6)°, Z = 4. Both structures con tain centrosymmetric cations (dmpipzH2)2+ in the chair form and slightly distorted tetrahedra [MBr4]2~ with a mirror plane in the case ofM = Co. Several distances N- • -Brin both structures are interpreted in terms of N-H- • Br hydrogen bonds which are favoured by the packing in the case of M = Zn.
	Reference	(Z. Naturforsch. 51b, 9—13 [1996]; eingegangen am 12. Juni 1995)
	Published	1996
	Keywords	1, 4-Dimethylpiperazinium Tetrabromometalates(II), Cobalt, Zinc, Crystal Structure
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	Identifier	ZNB-1996-51b-0009
	Volume	51

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