Holger Elsen
University of Erlangen-Nuremberg
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Publication
Featured researches published by Holger Elsen.
Angewandte Chemie | 2017
Michael Wiesinger; Brant Maitland; Christian Färber; Gerd Ballmann; Christian Fischer; Holger Elsen; Sjoerd Harder
Reaction of Ba[N(SiMe3 )2 ]2 with PhSiH3 in toluene gave simple access to the unique Ba hydride cluster Ba7 H7 [N(SiMe3 )2 ]7 that can be described as a square pyramid spanned by five Ba2+ ions with two flanking BaH[N(SiMe3 )2 ] units. This heptanuclear cluster is well soluble in aromatic solvents, and the hydride 1 H NMR signals and coupling pattern suggests that the structure is stable in solution. At 95 °C, no coalescence of hydride signals is observed but the cluster slowly decomposes to undefined barium hydride species. The complex Ba7 H7 [N(SiMe3 )2 ]7 is a very strong reducing agent that already at room temperature reacts with Me3 SiCH=CH2 , norbornadiene, and ethylene. The highly reactive alkyl barium intermediates cannot be observed and deprotonate the (Me3 Si)2 N- ion, as confirmed by the crystal structure of Ba14 H12 [N(SiMe3 )2 ]12 [(Me3 Si)(Me2 SiCH2 )N]4 .
Angewandte Chemie | 2017
Jens Langer; Brant Maitland; Samuel Grams; Alexandra Ciucka; Jürgen Pahl; Holger Elsen; Sjoerd Harder
While magnesium hydride complexes are generally stabilized by hard, bulky N-donor ligands, softer ligands with a broad variety of coordination modes are shown to efficiently adapt themselves to the large variety of Mg2+ centers in a growing magnesium hydride cluster. A P,N-chelating ligand is introduced that displays coordination modes between that of enamide, aza-allyl, and phosphinomethanide. Slight changes in the ligand bite angle have dramatic consequences for the structure type. The hitherto largest neutral magnesium hydride clusters are isolated either in a nonanuclear sheet-structure (brucite-type) or a dodecanuclear ring structure.
Angewandte Chemie | 2017
Brant Maitland; Michael Wiesinger; Jens Langer; Gerd Ballmann; Jürgen Pahl; Holger Elsen; Christian Färber; Sjoerd Harder
Nature Catalysis | 2018
Heiko Bauer; Mercedes Alonso; Christian Färber; Holger Elsen; Jürgen Pahl; Andrea Causero; Gerd Ballmann; Frank De Proft; Sjoerd Harder
Organometallics | 2017
Benjamin Freitag; Holger Elsen; Jürgen Pahl; Gerd Ballmann; Alberto Herrera; Romano Dorta; Sjoerd Harder
Chemical Communications | 2018
Jürgen Pahl; Steffen Brand; Holger Elsen; Sjoerd Harder
Angewandte Chemie | 2017
Andrea Causero; Holger Elsen; Jürgen Pahl; Sjoerd Harder
Chemical Communications | 2018
Jürgen Pahl; Holger Elsen; Alexander Friedrich; Sjoerd Harder
Angewandte Chemie | 2018
Holger Elsen; Christian Färber; Gerd Ballmann; Sjoerd Harder
Dalton Transactions | 2017
Benjamin Freitag; Christian Fischer; Johanne Penafiel; Gerd Ballmann; Holger Elsen; Christian Färber; Dirk F.-J. Piesik; Sjoerd Harder