Abstract
The synthesis and characterization of novel monomeric silylsilylenes [{PhC(NtBu)2}Si-Si{(NtBu)2-C(H)Ph}R] (R = Cl (2), H (4)) are described. Compound 2 was prepared by the treatment of [{PhC(NtBu) 2}SiHCl2] (1) with two equivalents of potassium graphite, whereas compound 4 was synthesized by the treatment of 1 with four equivalents of potassium graphite. The results suggest that silicon(II) hydride intermediate [{PhC(NtBu)2}SiH] was formed in the reduction, which underwent a hydrosilylation with the amidinate ligand of [{PhC(NtBu)2}SiR] (R=Cl or H) to form 2 and 4, respectively. The existence of [{PhC-(NtBu) 2}SiH] in solution was demonstrated by the treatment of [{PhC-(NtBu)2}SiCl] (3) with [K{HB(iBu)3}]. Compounds 2 and 4 have been characterized by X-ray crystallography and NMR spectroscopy. The results show that compounds 2 and 4 are stable in solution or the solid state, and do not dimerize to form the corresponding disilene. DFT calculations show that the Si-Si bonds in 2 and 4 do not have multiple-bond character.
| Original language | English |
|---|---|
| Pages (from-to) | 10250-10254 |
| Number of pages | 5 |
| Journal | Chemistry - A European Journal |
| Volume | 16 |
| Issue number | 33 |
| DOIs | |
| Publication status | Published - Sept 3 2010 |
| Externally published | Yes |
ASJC Scopus Subject Areas
- Catalysis
- General Chemistry
- Organic Chemistry
Keywords
- Carbene homologues
- N ligands
- Silicon
- Silylenes