Synthesis and Characterization of a Metallabenzyne

✍ Scribed by Ting Bin Wen; Zhong Yuan Zhou; Guochen Jia

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 107 KB
• Volume: 113
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/1521-3757(20010518)113:10<2005::aid-ange2005>3.0.co;2-u

✦ Synopsis

Interesting organometallic compounds can often be obtained by replacement of (hydro)carbon groups of organic compounds with isolobal transition metal fragments. [1] For example, the CH 2 group in CH 2 CHR can be replaced by 16electron transition metal fragments [L n M] to give carbene complexes [L n MCHR], the CH group in HCCR can be replaced by 15-electron transition metal fragments [L n M] to give carbyne complexes [L n M CR], and a CH group in benzene can be replaced by 15-electron transition metal fragments to give metallabenzenes. In principle, a carbon atom in benzyne could also be replaced by 14-electron transition metal fragments to give metallabenzynes. However, such a possibility has not previously been realized. Here we describe the synthesis and characterization of the first metallabenzyne.

Treatment of [OsCl 2 (PPh 3 ) 3 ] (1) [3] with an excess of HCCSiMe 3 in wet benzene produced a yellow precipitate and a brown solution. The yellow precipitate was identified as tal analysis (%) calcd for C 21