title: Tetracyclopropylmethane: A Unique Hydrocarbon with S(4) Symmetry This work was supported by the Fonds der Chemische Industrie. R.R.K. is grateful to the German Academic Exchange Service (DAAD) for a Research Fellowship, and A.P.M. to the European Union for a grant within the INTAS Program. The authors are indebted to Prof. Dr. P. von R. Schleyer and Dr. H. Jiao, Computer Chemistry Center of the Institut für Organische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, for some initial computations on tricyclopropylmethane and tetracyclopropylmethane (7 a) as well as for their continuing interest in these investigations, and to Dr. B. Knieriem, Universität Göttingen, for his careful reading of the final manuscript.
authors.affiliation: Institut für Organische Chemie der Georg-August-Universität Göttingen Tammannstrasse 2, 37077 Göttingen (Germany).
authors.forename: Sergei I.
authors.initials: SI
authors.lastname: Kozhushkov
authors.forename: Rafael R.
authors.initials: RR
authors.lastname: Kostikov
authors.forename: Alexander P.
authors.initials: AP
authors.lastname: Molchanov
authors.forename: Roland
authors.initials: R
authors.lastname: Boese
authors.forename: Jordi
authors.initials: J
authors.lastname: Benet-Buchholz
authors.forename: Peter R.
authors.initials: PR
authors.lastname: Schreiner
authors.forename: Christopher
authors.initials: C
authors.lastname: Rinderspacher
authors.forename: Ion
authors.lastname: Ghiviriga
authors.forename: Armin
authors.initials: A
authors.lastname: de Meijere