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Ciappe unpublished results."},{"key":"e_1_2_2_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/jlac.19687110108"},{"key":"e_1_2_2_18_2","unstructured":"Gaussian\u200998 (Revision\u2009A.11.4) M. J. Frisch G. W. Trucks H. B. Schlegel G. E. Scuseria M. A. Robb J. R. Cheeseman V. G. Zakrzewski J. A. Montgomery R. E. Stratmann J. C. Burant S. Dapprich J. M. Millam A. D. Daniels K. N. Kudin M. C. Strain O. Farkas J. Tomasi V. Barone M. Cossi R. Cammi B. Mennucci C. Pomelli C. Adamo S. Clifford J. Ochterski G. A. Petersson P. Y. Ayala Q. Cui K. Morokuma D. K. Malick A. D. Rabuck K. Raghavachari J. B. Foresman J. Cioslowski J. V. Ortiz B. B. Stefanov G. Liu A. Liashenko P. Piskorz I. Komaromi R. Gomperts R. L. Martin D. J. Fox T. Keith M. A. Al\u2010Laham C. Y. Peng A. Nanayakkara C. Gonzalez M. Challacombe P. M. W. Gill B. G. Johnson W. Chen M. W. Wong J. L. Andres M. Head\u2010Gordon E. S. Replogle J. A. Pople Gaussian Inc. Pittsburgh PA 2002."},{"key":"e_1_2_2_19_2","doi-asserted-by":"publisher","DOI":"10.1002\/ange.19971091208"},{"key":"e_1_2_2_19_3","doi-asserted-by":"publisher","DOI":"10.1002\/anie.199712841"},{"key":"e_1_2_2_20_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr00088a005"},{"key":"e_1_2_2_21_2","first-page":"4787","volume":"123","author":"Munzarova M. L.","year":"2001","journal-title":"J. Am. Chem. Soc."},{"key":"e_1_2_2_22_2","unstructured":"There is no minimum for a contact ion pair composed of the bromirenium cation and a tribromide anion at the levels of theory that we applied (B3LYP\/6\u201031G* B3LYP\/6\u201031(2d f) MP2\/6\u201031G*). The stationary point of lowest order that was found for such a species is theC2v\u2010symmetrical structure12\u2009b(saddle point). Structure12\u2009bis suitable as a model to estimate the lower level of the relative energy because the charges come very close to each other and hence minimize the dipole moment."},{"key":"e_1_2_2_23_2","doi-asserted-by":"publisher","DOI":"10.1016\/0301-0104(82)85072-6"},{"key":"e_1_2_2_24_2","doi-asserted-by":"publisher","DOI":"10.1016\/0301-0104(81)85090-2"},{"key":"e_1_2_2_25_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja00091a048"},{"key":"e_1_2_2_26_2","unstructured":"We are grateful to Prof. Dr. R. 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