Stabilization of hyperactive molecules through complexation: 2-formylbutadieneiron tricarbonyl. Preparation, cleavage and reactivity was written by Franck-Neumann, Michel;Martina, Daniel;Heitz, Marie Paule. And the article was included in Journal of Organometallic Chemistry in 1986.Electric Literature of C23H26BrP This article mentions the following:
The Fe formylbutadiene complex I was prepared from isoprene by 2 routes, and resolved via chiral semioxamazone formation. Treating I with organolithium or organocuprate reagents gave products diastereospecifically. On the other hand, treating I with Grignard reagents or with MeTi(OCHMe2)3 gave mixtures of diastereoisomers. Horner-Emmons reaction of I with (MeO)2P(O)CH2CO2Me gave a single isomer II. Treating II with Me2CN2 gave 闁?sup>1-pyrazoline-Fe diastereoisomers, as well as a 闁?sup>2-pyrazoline-Fe complex. Wittig reactions of I, followed by hydroboration, were also performed. In the experiment, the researchers used many compounds, for example, Isopentyltriphenylphosphonium bromide (cas: 28322-40-9Electric Literature of C23H26BrP).
Isopentyltriphenylphosphonium bromide (cas: 28322-40-9) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon闁艰京鐗梤omine bond is electrophilic in nature. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Electric Literature of C23H26BrP
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary