ZfN: Search Results

1	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
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/39/ZNB-1984-39b-1037.pdf
	Identifier	ZNB-1984-39b-1037
	Volume	39

2	Author	Alfred Gieren, Viktor Lamm, RobertC H Addon, M. Artin, L. Kaplan, M.John Perkins, Peter Flowerday	Requires cookie*
	Title	Vergleichende Röntgenstrukturanalysen von Naphthothiadiazinen und isovalenzelektronischen Naphthotriazinen-I-nstitut für B iochem ie, A bt. Strukturforschung I, D-8033 Martinsried
	Abstract	Röntgenstrukturanalysen von Acenaphthyleno[5,6-cd][l,2,6]-thiadiazin, 2-Methyl-2 H-acenaphthyleno[5,6-de]-l,2,3-triazin und Naphtho[l,8-de]thiadiazin Comparison of Naphthothiadiazines and Isoelectronic Naphthotriazines by X-Ray Structural Analysis X-Ray Structural Analyses of A cenaphthyleno[5,6-cd][l,2,6]thiadiazine, 2-M ethyl-2H -acenaphthyleno[5,6-de]-l,2,3-triazine and N ap h th o [l,8-de]thiadiazine We have performed an X-ray structural analysis of the sulphur diimide 1 and the isoelectronic triazine 2. In addition we found two crystal m odifications o f the sulphur diimide 3, which is an analogue o f the previously characterized 4, but the m odification suitable for X-ray analysis (tetra gonal, ß) was disordered. From the bond lengths o f 1 and 2 results, that in both cases there is only
	Reference	Z. Naturforsch. 39b, 975 (1984); eingegangen am 27. D ezem ber 1983
	Published	1984
	Keywords	Sulphur D iim ides, 1, 2, 3-Triazines, X -R ay, Bonding Relationships
	Similar Items	Find
	DEBUG INFO
	TEI-XML for	default:Reihe_B/39/ZNB-1984-39b-0975.pdf
	Identifier	ZNB-1984-39b-0975
	Volume	39