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57249099840
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2: colorless crystal (polyhedron, dimensions 0.36 × 0.22 × 0.16 mm3, crystal system monoclinic, space group P21/c, Z, 4, 10.7219(14, b, 9.0659(11, c, 13.7840(17) Å, β, 110.594(2)°, V, 1254.2(3) Å3, ρ, 1.356 g cm-3 T, 200(2) K. θmax, 28.30°. radiation MoKα, λ, 0.71073 Å, 0.3° ω scans with CCD area detector, covering a whole sphere in reciprocal space, 12804 reflections measured, 3107 unique (R(int, 0.0264, 2712 observed (I > 2σ(I, μ, 0.13 mm-1, T mim, 0.96, Tmax, 0.98, 159 parameters refined, hydrogen atoms were treated by using appropriate riding models, goodness of fit 1.14 for observed reflections, final residual values R1(F, 0.062. WRF 2, 0.146 for observed reflections, residual electron density -0.22 to 0
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Kα, A = 0.71073 A, 0.3° ω scans with CCD area detector, covering a whole sphere in reciprocal space, 17979 reflections measured.
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33
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0001752768
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Cambridge Structural Database, F. H. Allen, Acta Crystallogr. Sect. B 2002, 58, 380-388.
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34
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37049076890
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Electronic stabilization of a ylidic structure by an aromatic imidazolium moiety is also observed in the case of 2-methylenimidazoline. which also shows ylidic reactivity. Kuhn el al. found a mean C=C bond length of 1.362 A. whereas the bond length is shorter in 2-methylenimidazolidine (1.330 A) or an acyclic ketene N,N-acetal (1.333 Å, a) N. Kuhn, H. Bohnen, J. Kreutzberger, D. Bläser, R. Boese, J. Chem. Soc. Chem. Commun. 1993, 1136-1137;
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Electronic stabilization of a ylidic structure by an aromatic imidazolium moiety is also observed in the case of 2-methylenimidazoline. which also shows ylidic reactivity. Kuhn el al. found a mean C=C bond length of 1.362 A. whereas the bond length is shorter in 2-methylenimidazolidine (1.330 A) or an acyclic ketene N,N-acetal (1.333 Å): a) N. Kuhn, H. Bohnen, J. Kreutzberger, D. Bläser, R. Boese, J. Chem. Soc. Chem. Commun. 1993, 1136-1137;
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40
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57249097314
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4]: 1-Butyl-3-methylimidazolium tetrafluoroborate.
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4]: 1-Butyl-3-methylimidazolium tetrafluoroborate.
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41
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34948829223
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Review
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Review: R. Gleiter, C. Bleiholder, F. Rominger, Organometallics 2007, 26, 4850-4859.
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Organometallics
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Gleiter, R.1
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Rominger, F.3
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