Penta- and Hexacoordinated Si Compounds with Heavier Halides Br, I

2 Penta- and Hexacoordinated Si Compounds with Heavier Halides (Br, I) 

Last but not least, a carbene adduct of SiBr4 (175) with pentacoordinated Si atom (with carbene ligand in equatorial position and Si-Br bond lengths of 2.24 and 2.38/2.41 A for equatorial and axial sites, respectively) [108] and a dinuclear pentacoordinated bromosiUcon compound (176) with a central Si2N2 four-membered cycle and rather short axial Si—Br bonds (ca. 2.28 A) [340] have been reported. 

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