Premium
Reactivity of the Unusually Structured Silicon Cluster Compound Si 8 (Si t Bu 3 ) 6
Author(s) -
Wiberg Nils,
Vasisht ShamKumar,
Fischer Gerd,
Mayer Peter,
Huch Volker,
Veith Michael
Publication year - 2007
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200700316
Subject(s) - silicon , bicyclic molecule , reactivity (psychology) , ring (chemistry) , silicon tetrachloride , halogenation , chemistry , reagent , tin , molecule , crystallography , stereochemistry , organic chemistry , pathology , medicine , alternative medicine
When Si 8 R* 6 (R* = Si( t Bu) 3 ) is reacted with mild halogenation reagents like carbon tetrachloride, carbon tetrabromide, tin tetrachloride and iodine, new compounds are formed which besides the Si( t Bu) 3 groups have halide ligands and a silicon‐silicon back‐bone which is either cyclic, bicyclic or polycyclic. We here report on the molecular and crystal structures of four derivatives: Si 5 R* 3 Cl 5 (9) , Si 4 R* 3 Br 5 (10) , Si 8 R* 4 Cl 6 (11) and Si 8 R** 3 I 11 (12) . The molecule 9 has a bicyclic silicon back‐bone with a three‐ and four‐membered cycle sharing one edge, 10 is monocyclic with a four membered silicon‐silicon‐ring, 11 is polycyclic and can be derived from a Si 8 ‐cube and 12 is bicyclic with a four‐ and five‐membered silicon ring sharing one edge. We also propose some possible reaction mechanisms which follow from observations found during our experiments.