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The approximate diameter was calculated from the radius, measured from silicon to the proton in the 4′-position of biphenyl. The distance was measured using Spartan'02 v. 1.0.6 after performing a molecular mechanics minimization using an MMFF94 force field.
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The approximate diameter was calculated from the radius, measured from silicon to the proton in the 4′-position of biphenyl. The distance was measured using Spartan'02 v. 1.0.6 after performing a molecular mechanics minimization using an MMFF94 force field.
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A similar Pd-catalyzed synthesis of symmetrical 1,3-diynes was reported using chloroacetone as an oxidant, see: R. Rossi, A. Carpita, C. Bigelli, Tetrahedron Lett. 1985, 26, 523-526.
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A similar Pd-catalyzed synthesis of symmetrical 1,3-diynes was reported using chloroacetone as an oxidant, see: R. Rossi, A. Carpita, C. Bigelli, Tetrahedron Lett. 1985, 26, 523-526.
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The structural and thermal characteristics of 1,4-bis(triorgano-silyl) butadiynes have been studied, see: F. Carré, N. Devylder, S. G. Dutremez, C. Guérin, B. J. L. Henner, A. Jolivet, W. Tomberli, F. Dahan, Organometallics 2003, 22, 2014-2033.
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The structural and thermal characteristics of 1,4-bis(triorgano-silyl) butadiynes have been studied, see: F. Carré, N. Devylder, S. G. Dutremez, C. Guérin, B. J. L. Henner, A. Jolivet, W. Tomberli, F. Dahan, Organometallics 2003, 22, 2014-2033.
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The synthesis of 7 was carried out according to the analogous procedure for alkynyl bromide formation and was used in situ without purification or characterization, see: Y. Zhang, R. P. Hsung, M. R. Tracey, K. C. M. Kurtz, E. L. Vera, Org. Lett. 2004, 6, 1151-1154.
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The synthesis of 7 was carried out according to the analogous procedure for alkynyl bromide formation and was used in situ without purification or characterization, see: Y. Zhang, R. P. Hsung, M. R. Tracey, K. C. M. Kurtz, E. L. Vera, Org. Lett. 2004, 6, 1151-1154.
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35
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0001413313
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Given the sensitivity of both the trimethylsilyl and TBPS groups to base, standard Cadiot-Chodkiewicz cross-coupling conditions were judged too harsh, see
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Given the sensitivity of both the trimethylsilyl and TBPS groups to base, standard Cadiot-Chodkiewicz cross-coupling conditions were judged too harsh, see: W. Chodkiewicz, Ann. Chim. (Paris) 1957, 2, 819-869.
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40
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84942435207
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Attempts to refine peaks of residual electron density as solvent toluene carbon atoms were unsuccessful. The data were corrected for disordered electron density through use of the SQUEEZE procedure (P. van der Sluis, A. L. Spek, Acta Crystallogr, Sect. A 1990, 46, 194-201) as implemented in PLATON
-
b) Attempts to refine peaks of residual electron density as solvent toluene carbon atoms were unsuccessful. The data were corrected for disordered electron density through use of the SQUEEZE procedure (P. van der Sluis, A. L. Spek, Acta Crystallogr., Sect. A 1990, 46, 194-201) as implemented in PLATON
-
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41
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34250689804
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3 with a total electron count of 197 (consistent with four molecules of solvent toluene) was found in the unit cell.
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3 with a total electron count of 197 (consistent with four molecules of solvent toluene) was found in the unit cell.
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