1. Among its organometallic compounds is ferrocene, the first sandwich compound discovered. 2. Cyanide complexes are technically sandwich and half-sandwich compounds . 3. These interactions are commonly referred to as sandwich compounds . 4. They demonstrate that rhodium sandwich compounds can be prepared from half-sandwich precursors. 5. For example, this complex reacts with sodium cyclopentadienide to give the sandwich compound nickelocene. 6. An example of this approach is the QSARs developed for olefin polymerization by half sandwich compounds . 7. This pale yellow, volatile solid is classified as a sandwich compound and more specifically, as a metallocene. 8. Co ( C 5 H 5 ) 2 belongs to a group of organometallic compounds called metallocenes or sandwich compounds . 9. Sandwich compounds of rhodium, such as rhodocene, and Cp ) Rh ( CO ) 2 ] are well known.10. The parent compound is half-sandwich compound is prepared by the reaction of ruthenium trichloride with the terpene ?-phellandrene.