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1

Kokain

Steinke, Katrin, Jose, Elena, Siehl, Hans-Ullrich, Zeller, Klaus-Peter, Berger, Stefan

Journal:

Chemie in unserer Zeit

Year:

2013

Language:

german

File:

PDF, 922 KB

german, 2013

2

Natural Products (Isolation, Structure Elucidation, History) || Terpenoids

Sicker, Dieter, Zeller, Klaus-Peter, Siehl, Hans-Ullrich, Berger, Stefan

Year:

2019

Language:

english

File:

PDF, 9.29 MB

english, 2019

3

1 H- und 13 C-NMR-Spektroskopie

Findeisen, Matthias, Siehl, Hans-Ullrich, Berger, Stefan

Journal:

Chemie in unserer Zeit

Year:

2016

Language:

german

File:

PDF, 1.72 MB

german, 2016

4

COSY- und HSQC-NMR-Spektroskopie

Findeisen, Matthias, Siehl, Hans Ullrich, Berger, Stefan

Journal:

Chemie in unserer Zeit

Year:

2017

Language:

german

File:

PDF, 1017 KB

german, 2017

5

HMBC- und NOESY-NMR-Spektroskopie

Findeisen, Matthias, Siehl, Hans Ullrich, Berger, Stefan

Journal:

Chemie in unserer Zeit

Year:

2017

Language:

german

File:

PDF, 1.25 MB

german, 2017

6

Linderazulen aus einer invasiven Pflanze

Keltsch, Nils, Munzert, Viola, Zeller, Klaus‐Peter, Siehl, Hans‐Ullrich, Berger, Stefan, Sicker, Dieter

Journal:

Chemie in unserer Zeit

Year:

2019

Language:

german

File:

PDF, 2.67 MB

german, 2019

7

Unusually Stable Vinyl Cations

Thomas Müller, Rita Meyer, Dirk Lennartz, Hans-Ullrich Siehl

Journal:

Angewandte Chemie International Edition

Year:

2000

Language:

english

File:

PDF, 170 KB

english, 2000

8

Karminsäure

Schulze, Franziska, Titus, Juliane, Mettke, Peter, Berger, Stefan, Siehl, Hans-Ullrich, Zeller, Klaus-Peter, Sicker, Dieter

Journal:

Chemie in unserer Zeit

Year:

2013

Language:

german

File:

PDF, 1009 KB

german, 2013

9

Thymochinon - das Gelbe vom Öl

Spiller, Sandro, Mettke, Peter, Siehl, Hans-Ullrich, Zeller, Klaus-Peter, Sicker, Dieter, Berger, Stefan

Journal:

Chemie in unserer Zeit

Year:

2014

Language:

german

File:

PDF, 1.99 MB

german, 2014

10

Wie unsere Nase die enantiomeren Linaloole unterscheidet

Prasse, Agneta, Siehl, Hans-Ullrich, Zeller, Klaus-Peter, Berger, Stefan, Sicker, Dieter

Journal:

Chemie in unserer Zeit

Year:

2014

Language:

german

File:

PDF, 2.64 MB

german, 2014

11

Mit der Eberesche vom Heimatlied zur Frühstücksmagarine

Selg, Christoph, Geißler, David, Sicker, Dieter, Siehl, Hans-Ullrich, Zeller, Klaus-Peter, Berger, Stefan

Journal:

Chemie in unserer Zeit

Year:

2016

Language:

german

File:

PDF, 2.39 MB

german, 2016

12

Estragol aus Estragon

Prasse, Agneta, Zeller, Klaus-Peter, Siehl, Hans-Ullrich, Berger, Stefan, Sicker, Dieter

Journal:

Chemie in unserer Zeit

Year:

2018

Language:

german

File:

PDF, 2.26 MB

german, 2018

13

Natural Products (Isolation, Structure Elucidation, History) || Coloured Compounds

Sicker, Dieter, Zeller, Klaus-Peter, Siehl, Hans-Ullrich, Berger, Stefan

Year:

2019

Language:

english

File:

PDF, 7.32 MB

english, 2019

14

Natural Products (Isolation, Structure Elucidation, History) || Carbohydrates and Glycosides

Sicker, Dieter, Zeller, Klaus-Peter, Siehl, Hans-Ullrich, Berger, Stefan

Year:

2019

Language:

english

File:

PDF, 4.45 MB

english, 2019

15

Natural Products (Isolation, Structure Elucidation, History) || Chemical Substances Index

Sicker, Dieter, Zeller, Klaus-Peter, Siehl, Hans-Ullrich, Berger, Stefan

Year:

2019

File:

PDF, 142 KB

2019

16

Natural Products (Isolation, Structure Elucidation, History) || General Subject Index

Sicker, Dieter, Zeller, Klaus-Peter, Siehl, Hans-Ullrich, Berger, Stefan

Year:

2019

Language:

english

File:

PDF, 163 KB

english, 2019

17

Natural Products (Isolation, Structure Elucidation, History) || Name Index

Sicker, Dieter, Zeller, Klaus-Peter, Siehl, Hans-Ullrich, Berger, Stefan

Year:

2019

File:

PDF, 135 KB

2019

18

Natural Products (Isolation, Structure Elucidation, History) || Front Matter

Sicker, Dieter, Zeller, Klaus-Peter, Siehl, Hans-Ullrich, Berger, Stefan

Year:

2019

Language:

english

File:

PDF, 198 KB

english, 2019

19

Natural Products (Isolation, Structure Elucidation, History) || Quantum Chemical Calculation

Sicker, Dieter, Zeller, Klaus-Peter, Siehl, Hans-Ullrich, Berger, Stefan

Year:

2019

Language:

english

File:

PDF, 204 KB

english, 2019

20

Natural Products (Isolation, Structure Elucidation, History) || Appendix

Sicker, Dieter, Zeller, Klaus-Peter, Siehl, Hans-Ullrich, Berger, Stefan

Year:

2019

Language:

english

File:

PDF, 149 KB

english, 2019

21

Natural Products (Isolation, Structure Elucidation, History) || Aromatic Compounds

Sicker, Dieter, Zeller, Klaus-Peter, Siehl, Hans-Ullrich, Berger, Stefan

Year:

2019

Language:

english

File:

PDF, 2.74 MB

english, 2019

22

Experimental and quantum chemical investigation of the stereochemical dependence of spin coupling constants in symmetrical strained alkenes

Stefan Berger, Adolf Krebs, Bernd Thölke, Hans-Ullrich Siehl

Journal:

Magnetic Resonance in Chemistry

Year:

2000

Language:

english

File:

PDF, 64 KB

english, 2000

23

Preface

Hans-Ullrich Siehl, Marie-Françoise Ruasse

Journal:

Journal of Physical Organic Chemistry

Year:

2000

Language:

english

File:

PDF, 8 KB

english, 2000

24

Biomimetic rearrangement of the 2-cyclopentyl-2-propyl cation

Valerije Vrček, Hans-Ullrich Siehl, Olga Kronja

Journal:

Journal of Physical Organic Chemistry

Year:

2000

Language:

english

File:

PDF, 72 KB

english, 2000

25

Ungewöhnlich stabile Vinylkationen

Thomas Müller, Rita Meyer, Dirk Lennartz, Hans-Ullrich Siehl

Journal:

Angewandte Chemie

Year:

2000

Language:

german

File:

PDF, 170 KB

german, 2000

26

Umsetzung eines Vinylfluorides mit Antimonpentafluorid. Versuche zur Erzeugung eines stabilen Vinylkations

Dipl.-Chem. Hans-Ullrich Siehl, Dr. James C. Carnahan jr., Dipl.-Chem. Lothar Eckes, Prof. Dr. Michael Hanack

Journal:

Angewandte Chemie

Year:

1974

Language:

german

File:

PDF, 192 KB

german, 1974

27

Hypercarbon Chemistry. Von G. A. Olah, G. K. Surya Prakash, R. E. Williams, L. D. Field und K. Wade. John Wiley, New York 1987. 311 S., geb. $ 69.95 – ISBN 0-471-06473-4

Hans-Ullrich Siehl

Journal:

Angewandte Chemie

Year:

1988

Language:

german

File:

PDF, 276 KB

german, 1988

28

Das erste persistente β-Silyl-substituierte Vinyl-Kation

Priv.-Doz. Dr. Hans-Ullrich Siehl, Frank-Peter Kaufmann, Prof. Dr. Yitzhak Apeloig, Vivina Braude, David Danovich, Armin Berndt, Prof. Dr. Nikolaos Stamatis

Journal:

Angewandte Chemie

Year:

1991

Language:

german

File:

PDF, 502 KB

german, 1991

29

Die Suche nach einem isolierbaren Silyl-Kation muß weitergehen

Prof. Dr. Paul Von Ragué Schleyer, Peter Buzek, Dr. Thomas Müller, Prof. Dr. Yitzhak Apeloig, Priv.-Doz. Dr. Hans-Ullrich Siehl

Journal:

Angewandte Chemie

Year:

1993

File:

PDF, 616 KB

1993

30

Hydrocarbon Chemistry. 1. Auflage. Von G. A. Olah und Á. Molnár. Wiley-Interscience, New York, 1995. 632 S., geb. 134.90 DM. ISBN 0-471-11359-X

Hans-Ullrich Siehl, Alexander Christian Backes

Journal:

Angewandte Chemie

Year:

1996

Language:

german

File:

PDF, 316 KB

german, 1996

31

Reaction of a Vinyl Fluoride with Antimony Pentafluoride. Spectroscopic Evidence for a Stable Vinyl Cation

Dipl.-Chem. Hans-Ullrich Siehl, Dr. James C. Carnahan Jr., Dipl.-Chem. Lothar Eckes, Prof. Dr. Michael Hanack

Journal:

Angewandte Chemie International Edition

Year:

1974

Language:

english

File:

PDF, 205 KB

english, 1974

32

Book Review: Hypercarbon Chemistry. By G. A. Olah, G. K. Surya Prakash, R. E. Williams, L. D. Field, and K. Wade

Hans-Ullrich Siehl

Journal:

Angewandte Chemie International Edition

Year:

1988

Language:

english

File:

PDF, 148 KB

english, 1988

33

The First Persistent β-Silyl-Substituted Vinyl Cation

Priv.-Doz. Dr. Hans- Ullrich Siehl, Dipl.-Chem. Frank-Peter Kaufmann, Prof. Dr. Yitzhak Apeloig, Viviana Braude, David Danovich, Prof. Dr. Armin Berndt, Nikolaos Stamatis

Journal:

Angewandte Chemie International Edition

Year:

1991

Language:

english

File:

PDF, 508 KB

english, 1991

34

The Search for an Isolable Silyl Cation Must Continue

Prof. Dr. Paul von Ragué Schleyer, Peter Buzek, Dr. Thomas Müller, Prof. Dr. Yitzhak Apeloig, Prof. Dr. Hans-Ullrich Siehl

Journal:

Angewandte Chemie International Edition

Year:

1993

Language:

english

File:

PDF, 371 KB

english, 1993

35

Book Review: Hydrocarbon Chemistry. By G. A. Olah and Á. Molnár

Hans-Ullrich Siehl, Alexander Christian Backes

Journal:

Angewandte Chemie International Edition

Year:

1996

Language:

english

File:

PDF, 321 KB

english, 1996

36

(Phthalocyaninato)eisen(II)- und -ruthenium(II)- Verbindungen mit Isocyaniden als axialen Liganden

Uwe Keppeler, Wolfram Kobel, Hans-Ullrich Siehl, Michael Hanack

Journal:

European Journal of Inorganic Chemistry

Year:

1985

File:

PDF, 567 KB

1985

37

Gold Catalysis: Deuterated Substrates as the Key for an Experimental Insight into the Mechanism and Selectivity of the Phenol Synthesis

A. Stephen K. Hashmi, Matthias Rudolph, Hans-Ullrich Siehl, Masato Tanaka, Jan W. Bats, Wolfgang Frey

Journal:

Chemistry - A European Journal

Year:

2008

Language:

english

File:

PDF, 229 KB

english, 2008

38

ChemInform Abstract: Silyl-Substituted Carbocations

Hans-Ullrich Siehl, Thomas Muller

Journal:

Year:

1999

File:

PDF, 23 KB

1999

39

Calculation of NMR Parameters in Carbocation Chemistry

Hans-Ullrich Siehl, Valerije Vrcek

Journal:

Year:

2005

File:

PDF, 8 KB

2005

40

Influence of N-Alkyl Substituents and Counterions on the Structural and Mesomorphic Properties of Guanidinium Salts: Experiment and Quantum Chemical Calculations

Martin Butschies, Dr. Sven Sauer, Elena Kessler, Prof. Dr. Hans-Ullrich Siehl, Dr. Birgit Claasen, Dr. Peter Fischer, Dr. Wolfgang Frey, Prof. Dr. Sabine Laschat

Journal:

Year:

2010

Language:

english

File:

PDF, 601 KB

english, 2010

41

CCSD(T) calculation of NMR chemical shifts: consistency of calculated and measured 13C chemical shifts in the 1-cyclopropylcyclopropylidenemethyl cation

John F. Stanton, Jürgen Gauss, Hans-Ullrich Siehl

Journal:

Chemical Physics Letters

Year:

1996

Language:

english

File:

PDF, 308 KB

english, 1996

42

An application of the consistent charge equilibration (CQEq) method to guanidinium ionic liquid systems

Masato Tanaka, Hans-Ullrich Siehl

Journal:

Chemical Physics Letters

Year:

2008

Language:

english

File:

PDF, 218 KB

english, 2008

43

Stable vinyl cations 4: Carbon-13 nmr spectroscopic observation of an α-ferrocenyl-vinyl cation

Ernst-Wilhelm Koch, Hans-Ullrich Siehl, Michael Hanack

Journal:

Tetrahedron Letters

Year:

1985

Language:

english

File:

PDF, 188 KB

english, 1985

44

Editorial

Hans-Ullrich Siehl, Eduardo Humeres, Norihiro Tokitoh

Journal:

Journal of Physical Organic Chemistry

Year:

2003

Language:

english

File:

PDF, 25 KB

english, 2003

45

NMR Spectroscopic and quantum chemical characterization of the (E )− and (Z )− isomers of the penta-1,3-dienyl-2-cation

Hans-Ullrich Siehl, Thomas Müller, Jürgen Gauss

Journal:

Journal of Physical Organic Chemistry

Year:

2003

Language:

english

File:

PDF, 90 KB

english, 2003

46

NMR Spectroscopic and quantum chemical characterization of the (E)- and (Z)- isomers of the penta-1,3-dienyl-2-cation

Hans-Ullrich Siehl, Thomas Müller, Jürgen Gauss

Journal:

Journal of Physical Organic Chemistry

Year:

2003

Language:

english

File:

PDF, 27 KB

english, 2003

47

Quantum chemical calculation of structures and NMR chemical shifts of substituted buta-1,3-dienyl-2-cations

Hans-Ullrich Siehl, Sandra Brixner

Journal:

Journal of Physical Organic Chemistry

Year:

2004

Language:

english

File:

PDF, 124 KB

english, 2004

48

Electronic Properties of Furyl Substituents at Phosphorus and Their Influence on 31P NMR Chemical Shifts

Ackermann, Marco, Pascariu, Aurelia, Höcher, Thomas, Siehl, Hans-Ullrich, Berger, Stefan

Journal:

Journal of the American Chemical Society

Year:

2006

Language:

english

File:

PDF, 235 KB

english, 2006

49

Orthoamides and Iminium Salts LXXII: N,N,N′,N′,N′′,N′′,N′′′,N′′′-Octamethyl-(but-2-yne)-bis(amidinium) Tetrafluoroborate: The First Bis-amidinium Salt of Acetylenedicarboxyclic Acid. A New Superelectrophile?

Dr. Konstantin Drandarov, Dr. Ioannis Tiritiris, Olga Wassiljew, Prof. Dr. Hans-Ullrich Siehl, Prof. Dr. Willi Kantlehner

Journal:

Chemistry - A European Journal

Year:

2012

Language:

english

File:

PDF, 365 KB

english, 2012

50

The 1-Phenyl-1-(trimethylsilyl)ethyl Cation: An NMR Spectroscopic and Computational Study of the α-Silyl Effect in Benzyl Cations

Arseni Kostenko, Bernhard Müller, Frank-Peter Kaufmann, Yitzhak Apeloig, Hans-Ullrich Siehl

Journal:

European Journal of Organic Chemistry

Year:

2012

Language:

english

File:

PDF, 324 KB

english, 2012