Zobrazeno 1 - 10
of 138
pro vyhledávání: '"Ulrich Zenneck"'
Autor:
Christian Färber, Philipp Stegner, Ulrich Zenneck, Christian Knüpfer, Georg Bendt, Stephan Schulz, Sjoerd Harder
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
Elemental iron turns alkaline-earth metal complexes into highly active catalysts for the hydrogenation of alkenes, alkynes, imines and arenes. The proposed mechanism combines homogeneous catalysis by a soluble main group metal hydride complex with he
Externí odkaz:
https://doaj.org/article/0436aee2d35c44dbb66bb176dd8a3c06
Autor:
Sjoerd Harder, Jonathan Eyselein, Christian Knüpfer, Ulrich Zenneck, Christian Färber, Michael Wiesinger, Philipp Stegner
Publikováno v:
Angewandte Chemie (International Ed. in English)
Ba metal was activated by evaporation and cocondensation with heptane. This black powder is a highly active hydrogenation catalyst for the reduction of a variety of unactivated (non‐conjugated) mono‐, di‐ and tri‐substituted alkenes, tetraphe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::486181c869ba36dff7257a5842e1d3a2
https://doi.org/10.1002/ange.202014326
https://doi.org/10.1002/ange.202014326
Publikováno v:
Zeitschrift für anorganische und allgemeine Chemie. 643:922-931
Tetra-tert-butyl-P5-deltacyclene 5 represents one of only two asymmetric P-C cage compounds, which are available in highly enantiomerically enriched versions. This paper reports about stereoselective substitution reactions of 5 to develop the chemist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6208ee04be6c38c095bb0bd5a893726
https://doi.org/10.1002/zaac.201700132
https://doi.org/10.1002/zaac.201700132
Publikováno v:
Journal of Organometallic Chemistry. 821:91-99
Chiral P C cage compound tetra-tert-butyl-P5-deltacyclene 7 and the coinage metal salts CuCl, CH3COOAg, and (PPh3)AuCl form binuclear complexes with the metal atoms in the bridging position. In the case of copper, a Cu2Cl2 ring connects two intact li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b45042342603715020c4ed36cca2dde3
https://doi.org/10.1016/j.jorganchem.2016.04.023
https://doi.org/10.1016/j.jorganchem.2016.04.023
Autor:
Irene C. Keller, Walter Bauer, Ulrich Zenneck, Frank W. Heinemann, Christine Höhn, Tatyana E. Shubina, Lars Rohwer, Sergi Huguet Torrell
Publikováno v:
European Journal of Inorganic Chemistry. 2016:691-699
Cage-chiral P5-deltacyclene 1 is available as a pair of highly enriched P–C cage enantiomers 1′ and 1″, which exist as pairs of epimers a and b. Deprotonation of cage atom P1 initiates a rearrangement reaction, in which P1 and the neighboring c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e4c83de72ec5e852f3764b74f50733ab
https://doi.org/10.1002/ejic.201501015
https://doi.org/10.1002/ejic.201501015
Publikováno v:
European Journal of Inorganic Chemistry. 2013:5769-5780
Diastereomeric Pd and Pt complexes with a highly rigid chelate cage ligand core have been designed on the basis of alkylated C2-symmetric tetra-tert-butylhexaphosphapentaprismanes R2P6C4tBu4. The ligands are accessible by substitution of the diiodo d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3263c861150d9c6cc2513057e8aad68f
https://doi.org/10.1002/ejic.201300994
https://doi.org/10.1002/ejic.201300994
Autor:
Walter Bauer, Ulrich Zenneck, Irene C. Keller, Frank W. Heinemann, Lars Rohwer, Christine Höhn
Publikováno v:
Dalton transactions (Cambridge, England : 2003). 45(17)
Cage-chiral tetra-tert-butyl-P5-deltacyclene is accessible as a pair of highly enriched enantiomers and . The only secondary phosphorus atom P1 of the cage can be selectively oxidized by reaction with t-BuOOH. The P1-oxo species and , allow the direc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13883be12147903be9f9ad110745a380
https://pubmed.ncbi.nlm.nih.gov/27055252
https://pubmed.ncbi.nlm.nih.gov/27055252
Publikováno v:
Powder Technology. 207:17-25
Carbon nanotubes (CNTs) were prepared by catalytic chemical vapor deposition (CCVD) with the help of iron, ruthenium and bimetallic Fe/Ru nanoparticles on spNaY zeolite support and acetylene as the carbon source. The supported nanoparticle catalysts
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0af0864b5b2873a6d96aed91a700a28b
https://doi.org/10.1016/j.powtec.2010.10.005
https://doi.org/10.1016/j.powtec.2010.10.005
Autor:
Timothy Clark, Matthias Hennemann, Ulrich Zenneck, P. Binger, Karin Eggers, Frank W. Heinemann
Publikováno v:
Comptes Rendus Chimie. 13:1203-1212
2,4,6-Tri-tert-butyl-1,3,5-triphosphinine (7) was combined with 1,5-COD or 2,4-di-tert-butyl-1,3-diphosphete to form iron π-complexes. The ligands of highly reactive [(2,4-di-tert-butyl-1,3-diphosphete)(2,4,6-tri-tert-butyl-1,3,5-triphosphinine)Fe]
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9fb318d3d2404dd048f4a043419e438
https://doi.org/10.1016/j.crci.2010.05.023
https://doi.org/10.1016/j.crci.2010.05.023
Autor:
Martin Hofmann, Dietrich Gudat, László Nyulászi, Zoltán Benkő, Falk Lissner, Sebastian Burck, Ulrich Zenneck
Publikováno v:
Chemistry - A European Journal. 16:2857-2865
Computational studies on a series of polyphospholyl-substituted N-heterocyclic phosphines (CH) 2 (NR) 2 P-P n (CH) 5-n (R=Me, n=1-5) disclosed that increasing formal replacement of CH units in the phosphole ring by phosphorus atoms is associated with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c03970ff471f8eda0cc3756277b48a1
https://doi.org/10.1002/chem.200902931
https://doi.org/10.1002/chem.200902931