66809-05-0Relevant articles and documents
Cyclic Voltammetric Oxidation of Tetra-tert-butyltetrahedrane
Fox, Marye Anne,Campbell, Kay A.,Huenig, Siegfried,Berneth, Horst,Maier, Guenther,et al.
, p. 3408 - 3412 (1982)
Cyclic voltammetric oxidation of tetra-tert-butyltetrahedrane (1;Epa = 0.50 +/- 0.10 V vs.SCE) is irreversible, producing the radical cation of tetra-tert-butylcyclobutadiene.No evidence for transient formation of other stable cation radical intermediates could be obtained in the electrooxidation of 1 and its subsequent formation of 2 radical cation.The oxidation is a one-electron process, and no waves attributable to redox reactions of the dication or dianion of cyclobutadiene could be observed.
Small Rings, 79. - Synthesis and Properties of Novel Silyl-Substituted Cyclobutadienes and Tetrahedranes
Maier, Guenther,Wolf, Reinhard,Kalinowski, Hans-Otto,Boese, Roland
, p. 191 - 200 (2007/10/02)
The cyclobutadienes 2b,d as well as the corresponding tetrahedranes 3b,d have been prepared according to the "Masamune route" by starting from the diazo compounds 1b,d.Low temperature 13C-NMR measurements of the cyclobutadienes 2a,b,d lead to the first exact values of the barrier heights in the interconversion of the two rectangular forms of the cyclobutadienes.Fluorodesilylation of 3d probably proceeds via tri-tert-butyltetrahedrane (3h) and cyclobutadiene 2h and finally yields diketone 18.Reaction of tetrahedrane 3d with LiAlH4 in boiling THF leads to tetrahedrane 3e, which is much less stable than all previously known tetrahedrane derivatives. - Key Words: Diazo compounds / Valence isomerization / "Corset effect", limits of
The Homolysis of C-H Bonds in Carbocations
Chan, Wang,Courtneidge, John L.,Davies, Alwyn G.,Djap, Woei Haw,Gregory, Peter S.,Yazdi, Safieh N.
, p. 1541 - 1542 (2007/10/02)
The e.s.r. spectra of certain tetra-alkylcyclobutadiene radical cations, of the hexamethylcyclopentadiene radical cation, and of various polycyclic aromatic radical cations, RH.+, are observed when the corresponding hydrocarbon cations, RH2+, are photolysed in trifluoroacetic acid solvent.