+Bonded organic groups in transition-metal complexes can rearrange to n-bonding ligands and vice versa: the classic example is the formation of n-arenechromium complexes from c-arylchromium compounds. Rearrangements of this kind can be induced, inter alia, by reactions of the metal or of the ligand, as well as by migration or insertion of a ligand. Rearrangements play a role in many industrialprocesses, including the polymerization and isornerization of olefins and the hydroformylation of olejins.
Di^-cyclopentadienyliron chloride monotetrahydrofuranate (2) was prepared from the reaction of sodium cyclopentadienide and iron(III) chloride in a 2:1 molar ratio at -80°in tetrahydrofuran (THF). This compound (2) is stable either as a yellow solid at -80°or in THF solution at room temperature. Above -50°or upon the addition of organic solvents, such as ether or «-pentane, 2 rearranges to a blue solid, ferricenium chloride.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.