Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Ulrich Burkert"'
Autor:
Viola Podsadlowski, Uta P. Buchele, Frank-Gerrit Klärner, Heinz Bandmann, Ulrich Burkert, Matthias Lobert
Publikováno v:
Chemistry - A European Journal. 12:1629-1641
The dynamics in the host-guest complexes of the molecular tweezers 1 a,b and clips 2 a,b with 1,2,4,5-tetracyanobenzene (TCNB, 3) and tropylium tetrafluoroborate (4) as guest molecules were analyzed by temperature-dependent 1H NMR spectroscopy. The T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::137cc734186217b19056a1c213235295
https://doi.org/10.1002/chem.200500902
https://doi.org/10.1002/chem.200500902
Autor:
Uta P. Seelbach, Jens Panitzky, Roland Boese, Arne E. Wigger, Markus Kamieth, Ulrich Burkert, Dieter Bläser, Jolanta Polkowska, Frank-Gerrit Klärner, Michael Baumann
Publikováno v:
European Journal of Organic Chemistry. 2004:1405-1423
Molecular tweezers and clips of type 1−3 substituted with OAc, OH, OCONHPh, OMe, OCH2COOR and OCH2CONHR groups in the central spacer units have been synthesized by modification, by standard methods, either of the known diacetoxy-substituted derivat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::794247aca5e465a09bf59ea711f25662
https://doi.org/10.1002/ejoc.200300704
https://doi.org/10.1002/ejoc.200300704
Publikováno v:
Journal of Physical Organic Chemistry. 13:604-611
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85b83a70a1ae28c6eee0fa2690c76ed3
https://doi.org/10.1002/1099-1395(200010)13:10<604::aid-poc271>3.0.co
https://doi.org/10.1002/1099-1395(200010)13:10<604::aid-poc271>3.0.co
Publikováno v:
Chemistry - A European Journal. 5:1700-1707
The molecular tweezers 1 and 2 are selective receptors for electron-deficient aromatic and aliphatic substrates forming, for example, complexes with onium salts such as N-methylpyrazinium iodide, depending on the size and the electrostatic potential
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ab883c9404c9288ab2716a7b063084af
https://doi.org/10.1002/(sici)1521-3765(19990604)5:6<1700::aid-chem1700>3.0.co
https://doi.org/10.1002/(sici)1521-3765(19990604)5:6<1700::aid-chem1700>3.0.co
Autor:
Roland Boese, Ulf Naatz, Markus Kamieth, Johannes Benkhoff, Frank-Gerrit Klärner, Ulrich Burkert
Publikováno v:
Angewandte Chemie. 108:1195-1198
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5912b75c87a4924b7fa12e6c96cd4e90
https://doi.org/10.1002/ange.19961081020
https://doi.org/10.1002/ange.19961081020
Autor:
Roland Boese, Jolanta Polkowska, Markus Kamieth, Uta P. Seelbach, Arne E. Wigger, Frank-Gerrit Klärner, Jens Panitzky, Michael Baumann, Dieter Bläser, Ulrich Burkert
Publikováno v:
European Journal of Organic Chemistry. 2004:1367-1367
The cover picture shows the structures of the empty dimethoxy-substituted clip and the host−guest complex between the hydroquinone clip and 1,2,4,5-tetracyanobenzene (TCNB) calculated by force field. The calculations are in good agreement with sing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08a06dcbf0f7a4d491a2b92a73036bb5
https://doi.org/10.1002/ejoc.200490014
https://doi.org/10.1002/ejoc.200490014
Autor:
Matthias Lobert, Heinz Bandmann, Ulrich Burkert, Uta P. Büchele, Viola Podsadlowski, Frank-Gerrit Klärner
Publikováno v:
Chemistry - A European Journal; Mar2006, Vol. 12 Issue 6, p1629-1641, 13p
Autor:
Frank-Gerrit Klärner, Jolanta Polkowska, Jens Panitzky, Uta P. Seelbach, Ulrich Burkert, Markus Kamieth, Michael Baumann, Arne E. Wigger, Roland Boese, Dieter Bläser
Publikováno v:
European Journal of Organic Chemistry; Apr2004, Vol. 2004 Issue 7, p1405-1423, 19p
Autor:
Ulrich Burkert
Publikováno v:
Tetrahedron. 33:2237-2242
Zusammenfassung Moglichkeiten zur Behandlung freier Elektronenpaare an Sauerstoff in Kraftfeldrechnungen werden am Beispiel von 1,3-Dioxanen diskutiert. Die Geometrie von 1,3-Dioxanen kann auch ohne explizite Berucksichtigung der freien Elektronenpaa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1144859f89db97504d7c62b51afd45e2
https://doi.org/10.1016/0040-4020(77)80009-4
https://doi.org/10.1016/0040-4020(77)80009-4