In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Interligand Interactions Dictate the Regioselectivity of trans-Hydrometalations and Related Reactions Catalyzed by [Cp*RuCl]. Hydrogen Bonding to a Chloride Ligand as a Steering Principle in Catalysis, published in 2015-04-29, which mentions a compound: 92390-26-6, Name is Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium, Molecular C18H28ClRu, Application In Synthesis of Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium.
Reactions of internal alkynes with R3M-H (M = Si, Ge, Sn) follow an unconventional trans-addition mode in the presence of [Cp*Ru(MeCN)3]PF6 (1) as the catalyst; however, the regioselectivity is often poor with unsym. substrates. This problem can be solved upon switching to a catalyst comprising a [Ru-Cl] bond, provided that the acetylene derivative carries a protic functional group. The R3M unit is then delivered with high selectivity to the alkyne-C atom proximal to this steering substituent. This directing effect originates from the ability of the polarized [Ru-Cl] bond to engage in hydrogen bonding with the protic substituent, which helps upload, activate, and lock the alkyne within the coordination sphere. An addnl. interligand contact of the chloride with the -MR3 center positions the incoming reagent in a matching orientation that translates into high regioselectivity. The proposed secondary interactions within the loaded catalyst are in line with a host of preparative and spectral data and with the structures of the novel ruthenium π-complexes in the solid state. Also, the first x-ray structure of a [Ru(σ-stannane)] complex is presented, which indeed features peripheral Ru-Cl···MR3 contacts; this adduct also corroborates that alkyne trans-addition chem. likely involves σ-complexes as reactive intermediates. Finally, it is discussed that interligand cooperativity might constitute a more general principle that extends to mechanistically distinct transformations. The presented data therefore make an interesting case for organometallic chem. that provides inherently better results when applied to substrates containing unprotected rather than protected -OH, -NHR, or -COOH groups.
After consulting a lot of data, we found that this compound(92390-26-6)Application In Synthesis of Chloro(1,5-cyclooctadiene)(pentamethylcyclopentadienyl)ruthenium can be used in many types of reactions. And in most cases, this compound has more advantages.
Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method