AI Article Synopsis
- The synthesis and characterization of two silicon-containing compounds, a singlet delocalized 2,4-diimino-1,3-disilacyclobutanediyl (compound 2) and a silylenylsilaimine (compound 3), are detailed.
- The reaction involved disilylene reacting with a diazonium compound in toluene, yielding the two products in a specific ratio after 12 hours at room temperature.
- Both compounds were analyzed using NMR spectroscopy and X-ray crystallography, with compound 2 showing unique properties of electronic delocalization and compound 3 being a novel example of its type in chemistry.
Article Abstract
The synthesis and characterization of a singlet delocalized 2,4-diimino-1,3-disilacyclobutanediyl, [LSi(μ-CNAr)(2)SiL] (2, L: PhC(NtBu)(2), Ar: 2,6-iPr(2) C(6) H(3)), and a silylenylsilaimine, [LSi(=NAr)-SiL] (3), are described. The reaction of three equivalents of the disilylene [LSi-SiL] (1) with two equivalents of ArN=C=NAr in toluene at room temperature for 12 h afforded [LSi(μ-CNAr)(2)SiL] (2) and [LSi(=NAr)-SiL] (3) in a ratio of 1:2. Compounds 2 and 3 have been characterized by NMR spectroscopy and X-ray crystallography. Compound 2 was also investigated by theoretical studies. The results show that compound 2 possesses singlet biradicaloid character with an extensive electronic delocalization throughout the Si(2)C(2) four-membered ring and exocyclic C=N bonds. Compound 3 is the first example of a silylenylsilaimine, which contains a low-valent silicon center and a silaimine substituent. A mechanism for the formation of 2 and 3 is also proposed.
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| http://dx.doi.org/10.1002/chem.201103351 | DOI Listing |
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