In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Structural characterization of Cp*Ru-intermediates of phenylacetylene cyclotrimerization, published in 1999, which mentions a compound: 92390-26-6, mainly applied to crystal structure ruthenacyclopentatriene benzene cyclopentadiene ruthenium sandwich; mol structure ruthenacyclopentatriene benzene cyclopentadiene ruthenium sandwich; ruthenacyclopentatriene preparation structure; ruthenium benzene cyclopentadiene sandwich preparation structure; cyclotrimerization phenylacetylene; acetylene cyclotrimerization, COA of Formula: C18H28ClRu.
Phenylacetylene reacts depending on the reaction conditions with Cp*Ru(COD)Cl under formation of the neutral dicarbene complex 2,5-diphenyl-Cp*ruthenacyclopentatriene or the cationic sandwich compound [Cp*Ru(1,2,4-triphenyl)benzene]. The x-ray structures and spectroscopic data of both complexes are presented. The complexes can be interpreted as intermediates in the CpRu-catalyzed cyclotrimerization of acetylenes.
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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method