The unusual attachment of an alkyne across the open edge of a Rh2Pd complex

Autor:	Ron S. Dickson, Geoffrey R. County, Gary D. Fallon
Rok vydání:	1998
Předmět:	chemistry.chemical_classification Molecular model Stereochemistry Organic Chemistry Alkyne chemistry.chemical_element Edge (geometry) Biochemistry Nmr data Rhodium Inorganic Chemistry Crystallography chemistry Materials Chemistry Physical and Theoretical Chemistry Palladium
Zdroj:	Journal of Organometallic Chemistry. 565:11-18
ISSN:	0022-328X
Popis:	A structurally interesting hetero-trinuclear complex of formula (η5-C5H5)2Rh2Pd(μ3-CO)(μ-η1:η2:η2-CF3C2CF3){η2-Ph2P(CH2)2PPh2} (III) has been formed from the reaction between (η5-C5H5)2Rh2(CO)(μ-η1:η1-CF3C2CF3){η1-Ph2P(CH2)2PPh2}(II) and (η5-C5H5)Pd(η3-C3H5). Determination of the structure of (III) by X-ray crystallography has shown that there is an open Rh2Pd core with an unusual attachment of the alkyne. This is σ-bonded to the central rhodium and sits across the open Rh⋯Pd edge of the core. Molecular modeling established that one CF3 is free to rotate but the other is restrained. The bisphosphine, which was initially attached to rhodium, is chelated to palladium. In solution, a second isomer (IV) coexists with (III); spectroscopic results indicate that (IV) incorporates a Rh–C(O)–C(CF3)C CF3 unit within a structure that has a closed Rh2Pd core. Variable temperature NMR data indicate that the molecular structures of both isomers are fluxional in solution.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bfd857544e8b749158846f1f9eea542d https://doi.org/10.1016/s0022-328x(98)00494-x Zobrazit plný text záznamu Full Text from ScienceDirect