Metallorganische Lewis-Säuren, XIV [1]. Ethylen-verbrückte Mangan- und Rheniumcarbonyle; Tieftemperatur-Röntgenstrukturanalyse von (OC)5ReCH2CH2Re(CO)5 / Organometallic Lewis Acids, XIV [1]. Ethylene Bridged Manganese and Rhenium Carbonyls; Low Temperature X-Ray Structure of (OC)5ReCH2CH2Re(CO)5

Abstract

Abstract The tetrafluoroborato complexes (OC)5MFBF3 (M = Mn, Re) which are obtained by methyl abstraction from (OC)5MCH3 using Ph3CBF4 react with ethylene or propene at room temperature and 1 bar to give [(OC)5M(alkene)]+ BF4-. By nucleophilic addition of the carbonylmetalates [M(CO)s] -(M = Mn, Re) to the coordinated alkene in these cationic complexes [(OC)5M(alkene)]+ the alkene bridged complexes (OC)5MCH2CH(R)M(CO)5 (M = Mn, Re; R = H, Me) are formed. Also the mixed-metal complex (OC)5MnCH2CH2Re(CO)5 has been isolated. According to an X-ray structure at low temperature (OC)5ReCH2CH2Re(CO)5 can be considered as a dimetal substituted ethane with a carbon-carbon distance of 152 pm.