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The quantity of radical character is fundamentally different from the theory of radical behavior. Radical character serves as a theoretical measure, whereas radical behavior is experimentally observed for such species
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The quantity of radical character is fundamentally different from the theory of radical behavior. Radical character serves as a theoretical measure, whereas radical behavior is experimentally observed for such species.
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For some mechanistic studies see ref 10a
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1H NMR spectroscopic investigations on the crude reaction mixtures revealed that only one heavy [1.1.1]propellane has been formed consisting of the cluster atom connectivity described in the text. However, we are not able to exclude that other, for example, [2.1.1]propellanes are formed during the complex reactions
-
1H NMR spectroscopic investigations on the crude reaction mixtures revealed that only one heavy [1.1.1]propellane has been formed consisting of the cluster atom connectivity described in the text. However, we are not able to exclude that other, for example, [2.1.1]propellanes are formed during the complex reactions.
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As described in the Experimental Section, the workup procedure of 2 requires a step in which the thoroughly dried crude product of the reductive coupling reaction has to be exposed to air for several minutes. During this time, the color changes to dark purple, indicative for the formation of 2. Currently, we are not able to comment on the reactions taking place in this step. This is work in progress
-
As described in the Experimental Section, the workup procedure of 2 requires a step in which the thoroughly dried crude product of the reductive coupling reaction has to be exposed to air for several minutes. During this time, the color changes to dark purple, indicative for the formation of 2. Currently, we are not able to comment on the reactions taking place in this step. This is work in progress.
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note
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2 state in Figure 3 is based on the agreement with its B3LYP/def2-TZVP excitation energy as well as its computed oscillator strength (which is an order of magnitude larger than for a nearby E -type transition).
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79952976107
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2 symmetry
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2 symmetry.
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6 and 2, however, give only decomposition products
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6 and 2, however, give only decomposition products.
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EI mass spectrometric investigations on powder samples of 4 and 5 gave only full decomposition of the compounds
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EI mass spectrometric investigations on powder samples of 4 and 5 gave only full decomposition of the compounds.
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It is important to note that we have observed a linear relationship between the nonbonded Sn-Sn distances and the tin coupling constants for several addition products. Furthermore, even shorter distances have been detected for some 1,3-disubstituted bicyclo[1.1.1]pentane derivatives as compared to the [1.1.1]propellane parent systems. Dissertation, Karlsruhe Institute of Technology (KIT), (ISBN: 978-3-8325-2729-7). See also ref 4c
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