Former group members

Katharina Thum





Dr. Johannes Martin

 Johannes Martin  




Alexander Friedrich



Dr. Holger Elsen

 Holger Elsen











Dr. Steffen Brand












Dr. Christian Fischer

Christian Fischer











Dr. Gerd Ballmann

Gerd Ballmann 




















Dr. Thomas Gentner

Thomas Gentner 





















Dr. Jürgen Pahl

Jürgen Pahl


















Dr. Heiko Bauer

Heiko Bauer 

















Heiko Bauer finished his studies with a Diploma degree in 2008 in the group of Prof. Helmut Sitzmann at the Technical University of Kaiserslautern (Title: "Vinylferrocene"). He went on with his PhD in the group of Prof. Helmut Sitzmann, which he could finish successfully in 2013 with a thesis about "Alkylcyclopentadienyl complexes of iron, nickel and zirconium". To continue his research about alkylcyclopentadienyl complexes, he staid one year further at the Technical University of Kaiserslautern, before moving to the Friedrich-Alexander University Erlangen-Nürnberg in 2014, where he is currently a postdoctoral researcher in the group of Prof. Sjoerd Harder (Inorganic and Metalorganic Chemistry).



H. Bauer, M. Alonso, C. Färber, H. Elsen, J. Pahl, A. Causero, G. Ballmann, F. De Proft, S. Harder, Nat. Catal. 2018, 1, 40-47.


"Imine hydrogenation with simple alkaline earth metal catalysts"

DOI: 10.1038/s41929-017-0006-0


H. Bauer, L. Orzechowski, A. Escalona, G. Jansen, S. Harder, Organometallics 2017, 36, 4883-4890.

"Synthesis an d Structure of a Dimeric Iminophosphorane Stabilized Zinc Carbene: (ZnCR2)2 "

DOI: 10.1021/acs.organomet.7b00755


B. D. Roach, T. Lin, H. Bauer, R. S. Forgan, S. Parsons, D. M. Rogers, F. J. White, P. A. Tasker, Aust. J. Chem. 2017, published online.

"Salicylaldehyde Hydrazones: Buttressing of Outer-Sphere Hydrogen-Bonding and Copper Extraction Properties"

DOI: 10.1071/CH16639


H. Bauer. M. W. Wallasch, G. Wolmershäuser, Y. Sun, H. Sitzmann, Eur. J. Inorg. Chem. 2017, 505–510.

„Iron(III) Half-Sandwich Complexes of the Two-Legged Piano-Stool [CpFe(aryl)Cl] Type from the Corresponding Aryliron(II) Precursors"

DOI: 10.1002/ejic.201601026


H. Bauer, J. Weismann, D. Saurenz, C. Färber, M. Schär, W. Gidt, I. Schädlich, G. Wolmershäuser, Y. Sun, S. Harder, H. Sitzmann, J. Organomet. Chem. 2016, 809, 63–73.

„Chromocene, ferrocene, cobaltocene, and nickelocene derivatives with isopropyl and methyl or trimethylsilyl substituents”

DOI: 10.1016/j.jorganchem.2016.02.038


J.-Y. Chung, C. Schulz, H. Bauer, Y. Sun, H. Sitzmann, H. Auerbach, A. J. Pierik, V. Schünemann, A. Neuba, W. R. Thiel, Organometallics 2015, 34, 5374–5382.

„Cyclopentadienide Ligand CpC- Possessing Intrinsic Helical Chirality and its Ferrocene Analogues”

DOI: 10.1021/acs.organomet.5b00673


J. Intemann, H. Bauer, J. Pahl, L. Maron, S. Harder, Chem. Eur. J.  2015, 21, 11452–11461.

„Calcium Hydride Catalyzed Highly 1,2-selective Pyridine Hydrisilylation”

DOI: 10.1002/chem.201501072


G. Y. Vollmer, M. W. Wallasch, D. Saurenz, T. Eger, H. Bauer, G. Wolmershäuser, M. Prosenc,  H. Sitzmann, Organometallics 2015, 34, 644–652.

„Benzylidyne Bridges from Diphenylacetylene and a Methylidyne Bridge from Methylmagnesium chloride”

DOI: 10.1021/om501236h


H. Bauer, A. Glöckner, A. C. Tagne Kuate, S. Schäfer, Y. Sun, M. Freytag,  M. Tamm, M. D. Walter, H. Sitzmann, Dalton Trans. 2014, 43, 15818-15828.

„How big is a Cp? Novel cycloheptatrienyl zirconium complexes with tri-, tetra- and pentasubstituted cyclopentadienyl ligands”

DOI: 10.1039/c4dt01581a


H. Bauer, D. Weismann, G. Wolmershäuser, Y. Sun, H. Siztmann, Eur. J. Inorg. Chem. 2014, 3072-3084.

„Iron-mediated formation of a 2-Butyne Ligand from Ethylmagnesium Bromide“

DOI: 10.1002/ejic.201402143


S. Schäfer, H. Bauer, J. Becker, Y. Sun, H. Sitzmann, Eur. J. Inorg. Chem. 2013, 5694 – 5700.

„Cyclononatetraenyl-Indenyl Transformation and a Zirconium(III) Trimer from Bulky Alkylcyclopentadienylzirconium Chlorides“

DOI: 10.1002/ejic.201300885


H. Bauer, Y. Sun, H. Sitzmann, Acta Cryst. 2012, E68, m1450.


DOI: 10.1107/S1600536812041360


A. Glöckner, H. Bauer, M. Maekawa, T. Bannenberg, C. G. Daniliuc, P. G. Jones, Y. Sun, H. Sitzmann, M. Tamm, M. D. Walter, Dalton Trans. 2012, 41, 6614.

„How bis is a Cp? Cycloheptatrienyl zirconium complexes with bulky cyclopentadienyl and indenyl ligands”

DOI: 10.1039/c2dt12132h


H. Bauer, Y. Sun, H. Sitzmann, Acta Cryst. 2011, E67, m1184.


DOI: 10.1107/S1600536811028510





Dr. Benjamin Freitag

 Benjamin Freitag












Dr. Andrea Causero

Andrea Causero

















Dr. Brant Maitland

Dr. Brant Maitland
















Dr. Harmen Zijlstra

Harmen Zijlstra



Dr. Johanne Penafiel

Johanne Penafiel    

Dr. Tom Stennett

Tom Stennet    

Dr. Julia Intemann

Julia Intemann



Dr. Wu Xian

Wu Xian



Dr. Markus Jurisch

Markus Jurisch



Dr. Cédric Boulho

Cedric Boulho



Dr. Jan Spielmann


Dr. Dirk Piesik


Dr. Christian Ruspic


Dr. Lars Orzechowski


Dr. Frank Buch


Dr. Julie Brettar


Dr. Florian Feil