TY - JOUR
T1 - The thermal isomerization of a tetrahydro-2,3-disilanaphthalene into a 1,2-disilacyclobutane - The conversion of a formal silene [2+4] cyclodimer into the [2+2] cycloadduct
AU - Krempner, Clemens
AU - Kempe, Rhett
AU - Oehme, Hartmut
N1 - Funding Information:
We gratefully acknowledge the support by the Deutsche Forschungsgemeinschaft and the Fonds der Chemischen Industrie. We thank Dr. M. Michalik, Dr. W. Baumann and Prof. N. Stoll for recording the NMR and MS spectra, resp.
PY - 1997/7
Y1 - 1997/7
N2 - 1,2,3,8a-Tetrahydro-1-mesityl-5,7,8a-trimethyl-2,2,3,3- tetrakis(trimethylsilyl)-2,3-disilanaphthalene (3), the formal [2+4] cyclodimer of the transient 2-mesityl-1,1-bis(trimethylsilyl)-silene (2), on thermal treatment gradually isomerizes to give a mixture of the [2+2] products (E)- and - predominantly - (Z)-3,4-dimesityl-1,1,2,2-tetrakis(trimethylsilyl)-1,2-disilacyclobutane [(E/Z)-4]. By prolonged heating or at higher temperatures both (E/Z)-3 and (Z)-4 are converted into (E)-4, the thermodynamically most stable head-to-head dimer of 2. Possible pathways of the isomerization processes are discussed.
AB - 1,2,3,8a-Tetrahydro-1-mesityl-5,7,8a-trimethyl-2,2,3,3- tetrakis(trimethylsilyl)-2,3-disilanaphthalene (3), the formal [2+4] cyclodimer of the transient 2-mesityl-1,1-bis(trimethylsilyl)-silene (2), on thermal treatment gradually isomerizes to give a mixture of the [2+2] products (E)- and - predominantly - (Z)-3,4-dimesityl-1,1,2,2-tetrakis(trimethylsilyl)-1,2-disilacyclobutane [(E/Z)-4]. By prolonged heating or at higher temperatures both (E/Z)-3 and (Z)-4 are converted into (E)-4, the thermodynamically most stable head-to-head dimer of 2. Possible pathways of the isomerization processes are discussed.
KW - 1,2-Disilacyclobutane
KW - 2,3-Disilanaphthalene Tetrahydro
KW - Silene Dimerization
KW - Silenes
UR - http://www.scopus.com/inward/record.url?scp=0039380071&partnerID=8YFLogxK
U2 - 10.1515/znb-1997-0709
DO - 10.1515/znb-1997-0709
M3 - Article
AN - SCOPUS:0039380071
VL - 52
SP - 815
EP - 818
JO - Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
JF - Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences
SN - 0932-0776
IS - 7
ER -