@article{HegmannChristlPetersetal.1988, author = {Hegmann, Joachim and Christl, Manfred and Peters, Karl and Peters, Eva-Maria and Schnering, Hans Georg von}, title = {Die Reaktionskaskade von 6-Oxo-5-phenyl-1,3,4-oxadiazin-2-carbons{\"a}ure-methylester und 1,3-Butadienen zu konjugierten und nichtkonjugierten Cyclopentenonen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58421}, year = {1988}, abstract = {F{\"u}nfgliedrige Carbocyclen sind Bauelemente zahlreicher NaturstofTe und daher attraktive Syntheseziele. Da bisher kein Syntheseverfahren mit großer Anwendungsbreite bekannt ist, sind neue Methoden willkommen. Wir berichten hier {\"u}ber Umsetzungen des Titelheterocyclus 1 mit l,3-Butadienen 1; diese Reaktionen, obwohl vielstufig, liefern im Eintopfverfahren konjugierte und nichtkonjugierte Cyclopentenone und gestatten auch die F{\"u}nfringanellierung.}, subject = {Organische Chemie}, language = {de} } @article{ChristlLangHerzogetal.1985, author = {Christl, Manfred and Lang, Reinhard and Herzog, Clemens and Stangl, Roland and Peters, Karl and Peters, Eva-Maria and Schnering, Hans Georg von}, title = {Reaktion von Homobenzvalen mit Tetracyanethylen : Bildung eines Tetracyandihydrobarbaralan- und eines Tetracyancyclopropan-Derivats}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-31839}, year = {1985}, abstract = {In den Reaktionen von Tetracyanethylen (TCNE) und 5,6-Dichlor-2,3-dicyan-p-benzochinon mit Benzvalen haben wir k{\"u}rzlich die ersten Beispiele f{\"u}r die lange gesuchte einstufige 1,4-Cycloaddition eines Alkens an ein Vinylcyclopropan gcfunden(I~J. Sie ist als [(.,2.+.2s)+ 112J-Prozeß der Dicls-Alder-Addition nahe verwandtllbl. Allerdings entsteht das betreffende TCNE-Addukt, ein Dihydrosemibullvalen-Derivat, nur in einer Ausbeute von wenigen Prozent. Die Hauptprodukte gehen aus einer Zwitterionischen Zwischenstufe hervor, die durch Anlagerung von TCNE an die Benzvalen-n-Bindung resultiert. Professor Rolf Huisgen zum 65. Geburtstag gewidmet}, subject = {Chemie}, language = {de} } @article{BringmannHartungGoebeletal.1992, author = {Bringmann, Gerhard and Hartung, Thomas and Goebel, Lothar and Schupp, Olaf and Ewers, Christian L. J. and Schoener, Bernd and Zagst, Rainer and Peters, Karl and Von Schnering, Hans Georg and Burschka, Christian}, title = {Novel concepts in directed biaryl synthesis, IX: Synthesis and structure of benzonaphthopyranones, useful bridged model precursors for stereoselective biaryl syntheses}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-46635}, year = {1992}, abstract = {A practicable two-step procedure for the preparation of a series of lactone-type bridged biaryls 7 as favorable substrates for subsequent atropisomer-selective ring-opening reactions is described. Due to the efficiency of the coupling step, which tolerates even a telt·butyl group next to the biaryl axis and avoids problems of regioselectivity, a variety of differently substituted representatives is prepared. These cover a broad range of steric hindrance and thus molecular distortion. The structures are investigated mainly by NMR spectroscopy and X-ray diffraction, showing the lactones 7 to be helically distorted, depending on the size of the residues R.}, subject = {Chemie}, language = {en} } @article{KauppSchnering1993, author = {Kaupp, Martin and Schnering, Hans Georg von}, title = {Gaseous Mercury(IV) Fluoride, HgF\(_4\): An ab Initio Study}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-60038}, year = {1993}, abstract = {No abstract available}, subject = {Anorganische Chemie}, language = {en} } @article{KauppSchnering1994, author = {Kaupp, Martin and Schnering, Hans Georg von}, title = {Ab Initio Comparision of the (MX\(_2\))\(_2\) Dimers (m=Zn, Cd, Hg; X F, Cl, H), and Study of Relativistic Effects in Crystalline HgF\(_2\)}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-59971}, year = {1994}, abstract = {No abstract available}, subject = {Anorganische Chemie}, language = {en} } @article{KauppSchnering1994, author = {Kaupp, Martin and Schnering, Hans Georg von}, title = {Origin of the Unique Stability of Condensed-Phase Hg\(_2 ^{2+}\). An ab Initio Investigation of M\(^I\) and M\(^{II}\) Species (M= Zn, Cd, Hg)}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-59981}, year = {1994}, abstract = {No abstract available}, subject = {Anorganische Chemie}, language = {en} } @article{KauppSchnering1994, author = {Kaupp, Martin and Schnering, Hans Georg von}, title = {The Dominance of Linear 2-Coordination in Mercury Chemistry: Quasirelativistic and Nonrelativistic ab Initio Pseudopotential Study of (HgX\(_2\))\(_2\) (X=F, Cl, Br, I, H)}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-59995}, year = {1994}, abstract = {No abstract available}, subject = {Anorganische Chemie}, language = {en} } @article{KauppDolgStolletal.1994, author = {Kaupp, Martin and Dolg, Michael and Stoll, Hermann and Schnering, Hans Georg von}, title = {Oxidation State +IV in Group 12 Chemistry : Ab Initio Study of Zinc(IV), Cadmium(IV), and Mercury(IV) Fluorides}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-60018}, year = {1994}, abstract = {No abstract available}, subject = {Anorganische Chemie}, language = {en} } @article{KauppSchnering1993, author = {Kaupp, Martin and Schnering, Hans Georg von}, title = {Molekulares Quecksilber(IV)-fluorid, HgF\(_4\): eine ab-initio-Untersuchung}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-60021}, year = {1993}, abstract = {No abstract available}, subject = {Anorganische Chemie}, language = {de} } @article{HegmannChristlPetersetal.1988, author = {Hegmann, Joachim and Christl, Manfred and Peters, Karl and Peters, Eva-Maria and Schnering, Hans Georg}, title = {Conjugated and Nonconjugated Cyclopentenones by a Reaction Cascade from Methyl 6-0xo-5-phenyl-1,3,4-oxadiazine-2-carboxylate and 1,3-Butadienes}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-30207}, year = {1988}, abstract = {No abstract available}, language = {en} }