@phdthesis{Bahndorf2022, author = {Bahndorf, Katrin}, title = {Synthese und Charakterisierung von Aminos{\"a}ure-basierten Amphiphilen und deren Umsetzung zu C\(_3\)-symmetrischen Sternmesogenen - Strukturkontrolle in weicher Materie {\"u}ber Oligopeptidaggregation}, doi = {10.25972/OPUS-25275}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-252753}, school = {Universit{\"a}t W{\"u}rzburg}, year = {2022}, abstract = {Synthese einer Bibliothek von Aminos{\"a}ure-basierten Oligopeptid-Amphiphilen mittels Festphasensynthese, deren kovalente Kn{\"u}pfung an einen nukleophilen Kern zu C3-symmetrischen Sternmesogenen und die Analyse der Einfl{\"u}sse der verwendeten Aminos{\"a}uren auf die Sekund{\"a}rstruktur des synthetisierten Molek{\"u}ls.}, language = {de} } @article{BastChristlHuisgenetal.1972, author = {Bast, K. and Christl, Manfred and Huisgen, R. and Mack, W.}, title = {Additionen der Nitriloxide an CN-Mehrfachbindungen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57879}, year = {1972}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{BastChristlHuisgenetal.1973, author = {Bast, K. and Christl, Manfred and Huisgen, R. and Mack, W.}, title = {Relative Dipolarophilen-Aktivit{\"a}ten bei Cycloadditionen des Benzonitriloxids}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57935}, year = {1973}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{BastChristlHuisgenetal.1973, author = {Bast, K. and Christl, Manfred and Huisgen, R. and Mack, W. and Sustmann, R.}, title = {Additionen des Benzonitriloxids an olefinische und acetylenische Dipolarophile}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57905}, year = {1973}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{BastChristlHuisgenetal.1973, author = {Bast, K. and Christl, Manfred and Huisgen, R. and Sustmann, R.}, title = {Zur Anlagerung des Benzonitriloxids an α,β-unges{\"a}ttigte Carbons{\"a}ureester}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57912}, year = {1973}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{BentleyChristlKemmeretal.1994, author = {Bentley, T. W. and Christl, Manfred and Kemmer, R. and Llewellyn, G. and Oakley, J. E.}, title = {Kinetic and Spectroscopic Characterisation of Highly Reactive Methanesulfonates. Leaving Group Effects for Solvolyses and Comments on Geminal Electronic Effects Influencing S\(_N\)1 Reactivity}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58748}, year = {1994}, abstract = {Highly reactive methanesulfonates (mesylates, ROMs) have been prepared from 1-phenylethanol. cyclohex-2-en-1-ol, diphenylmethanol and p-methoxybenzyl alcohol by treatment with methanesulfonyl chloride and triethylamine in dichloro- or trichloro-methane at - 20 to 0 °C. The mesylates. characterised in solution by \(^1\)H and \(^{13}\)C NMR at -20 °C, were obtained in satisfactory purity (ca. 95\%) in cold solutions but they decomposed by reaction with chloride, triethylamine or the parent alcohol. Rate constants for solvolyses in aqueous acetone and aqueous ethanol have been determined by a fast response conductimetric method. Product selectivities for solvolyses of pmethoxybenzyl mesylate in aqueous ethanol and methanol at 0 °C have been determined by HPLC. From additional new or Iiterature kinetic data for solvolyses of corresponding bromides. chlorides and p-nitrobenzoates (OPNB). Br/CI. OMs/Br and OMs/OPNB rate ratios were calculated; the results are consistent with electronic effects stabilising the carbocationic transition states and increasing OMs/Br rate ratios for these SN 1 solvolyses; none of the evidence supports a geminal electronic effect on Br/CI rate ratios (e.g. caused by stabilisation of the initial state in pmethoxybenzyl chloride). Steric effects on ester /halide rate ratios for solvolyses of tertiary substrates are confirmed. Relative rates over a 10\(^{16}\) range for ester and halide leaving groups are evaluated for solvolyses of 1-phenylethyl substrates in 80\% ethanol-water. updating previous work by Noyce et al. (1972).}, subject = {Organische Chemie}, language = {en} } @article{BentleyChristlNorman1991, author = {Bentley, T. W. and Christl, Manfred and Norman, S. J.}, title = {Methanesulfonate/p-Nitrobenzoate and p-Toluenesulfonate/p-Nitrobenzoate Rate Ratios. Solvolyses of 1-Adamantyl and Benzhydryl Substrates}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58599}, year = {1991}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {en} } @article{BentleyNormanGerstneretal.1993, author = {Bentley, T. W. and Norman, S. J. and Gerstner, E. and Kemmer, R. and Christl, Manfred}, title = {Solvolysis of Tricyclo[3.1.0.0\(^{2,6}\)]hex-3-yl and Bicyclo[2.1.1]hex-2-yl Sulfonates}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58689}, year = {1993}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {en} } @article{BuendgenEngelsPeyerimhoff1991, author = {B{\"u}ndgen, P. and Engels, Bernd and Peyerimhoff, S.D.}, title = {An MRD-CI study of low-lying electronic states in CaF}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58880}, year = {1991}, abstract = {Dipole moments and various spectroscopic constants of some low-lying electronic states of the CaF molecule have been calculated using the multireference single· and double-excitation configuration-interaction (MRD-CI) method. The electronic structure of the highly ionic molecule in various excited states can be explained in tenns of different polarisations of the mainly Cacentered valence electron in the field of the F\(^-\) anion. Plots of natural orbitals occupied by the valence electron in the different states give a qualitative picture of the charge distribution and provide a visualisation of the different polarisations of the valence electron in the various states. Comparisons with the electrostatic polarisation model ofT{\"o}rring, Ernstand K{\"a}ndler (TEK model) are made. The unknown A' \(^2 \Delta\) state is predicted to lie about 21200 cm\(^{-1}\) above the ground state.}, subject = {Organische Chemie}, language = {en} } @article{Christl1975, author = {Christl, Manfred}, title = {\(^{13}\)-NMR-Spektren von Bicyclo[n.1.0]kohlenwasserstoffen}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-57977}, year = {1975}, abstract = {No abstract available}, subject = {Organische Chemie}, language = {de} } @article{ChristlBraun1989, author = {Christl, Manfred and Braun, Martin}, title = {Freisetzung und Abfangreaktionen von 1-Oxa-2,3-cyclohexadien}, url = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-58517}, year = {1989}, abstract = {Umsetzung von 6,6-Dichlor-2-oxabicyclo[3.1.0)hexan (4a) in Styrol mit n-Butyllithium lieferte neben Polystyrol und t-Chlor-1- pbenylhexan (6) in geringer Ausbeute die Tet~hydrocyclobutapyrane 5, die Abfangprodukte des aus 4a generierten t-Oxa-2,3- cyclobexadiens (3). Das unbest{\"a}ndige 6,6-Dibrom-2-oxabicyclo( J.l.O]hexan (4b) wurde bei -60°C erzeugt un~ bei -30°C mit Methyllithium in Gegenwart von Styrol umgesetzt, woraus die Produkte 5 mit 24\% Ausbeute hervorgingen. Als bei 20°C best{\"a}ndige Quelle f{\"u}r 3 erwies sich exo-6-Brom-e~o-6-fluor-2-oxabicyclo[ J.t.O]bexan (9), das aus 2,3-Dihydrofuran und Bromßuorcarben mit 25\% Ausbeute bereitet wurde. Behandlung von 9 in Styrol,