24731-35-9Relevant articles and documents
Synthesis of metallasiloxanes of group 13-15 and their application in catalysis
Li, Yan,Wang, Jinjin,Wu, Yile,Zhu, Hongping,Samuel, Prinson P.,Roesky, Herbert W.
, p. 13715 - 13722 (2013)
Herein we report on the synthesis, characterization and catalytic application of metallasiloxanes of group 13-15. Reactions of R(Me)Si(OH) 2 (R = N(SiMe3)-2,6-iPr2C6H 3) (A) with Bi(NEt2)3, Sb(NEt2) 3, Ge[N(SiMe3)2]2 and AlMe 3 afforded [R(Me)SiO2BiNEt2]2 (1), [R(Me)SiO2SbOSi(OH)(Me)R]2 (2), [R(Me)SiO 2]3(GeH)2 (3), and [R(Me)SiO 2AlMe(THF)]2 (4), respectively. Reactions of RSi(OH) 3 (B) with Bi(NEt2)3 and AlMe3 produced complexes (RSiO3Bi)4 (5) and (RSiO 3)2[AlMe(THF)]3 (6). Compounds 1-6 have been characterized by IR and NMR spectroscopy, single crystal X-ray structure and elemental analysis. Each of the compounds 1, 2 and 4 features an eight-membered ring of composition Si2O4Bi2, Si 2O4Sb2 and Si2O4Al 2, while 3 and 6 exhibit a bicyclic structure with the respective skeletons of Si3O6Ge2 and Si2O 6Al3. Compound 5 has a cubic core of Si4O 12Bi4. Compounds 1-6 exhibit very good catalytic activity in the addition reaction of trimethylsilyl cyanide (TMSCN) with benzaldehyde. Compound 5 was found to be the best catalyst and its activity was probed in the reactions of TMSCN with a number of aldehydes and ketones.
