Electronic control of stereoselectivity. 20. Crystal and molecular structure of the ferrocene derived from tricyclo[5.2.1.02,6]Deca-2,5,8-triene

✍ Scribed by Leh-Yeh Hsu; Susan J. Hathaway; Leo A. Paquette

• Publisher: Elsevier Science
• Year: 1984
• Tongue: French
• Weight: 214 KB
• Volume: 25
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)99855-1

✦ Synopsis

the effect of all, due to the customary greater importance of d,-$, interactions relative to those of the c',-Q1 type. In this event, a metallic species with contracted dT orbitals (i.e., a small metal or one in a high oxidation state) would likely favor top-side bonding (viz., z), whereas one with diffuse dv orbitals could engage in better overlap on the endo face (cf ,Q). 4, B !2 Because both hypotheses predict that an Fe(I1) atom may prefer to coordinate to ,J, from its exo surface in direct contrast to the stereoseZectivity of electrophilic cqtwe, preparation of the ferrocene derivative was undertaken.' Sequential reaction of isodicyclopentadiene with ethylmagnesium bromide and Fe(II)(acac)z(py)2 in xylene solution (2 days as 2O"C, 1 h at 65-70°C) resulted in 33% conversion to a single ferrocene (@) which was isolated as golden plates,