914613-79-9Relevant academic research and scientific papers
Heterobimetallic Fe-Pd and Fe-Pt NCN pincer complexes (NCN = [C6H2(CH2NMe2)2-2 ,6]-)
K?cher, Stefan,Lutz, Martin,Spek, Anthony L.,Prasad, Rajendra,van Klink, Gerard P.M.,van Koten, Gerard,Lang, Heinrich
, p. 4454 - 4462 (2006)
The meta-diaminoaryl ferrocenes Fc-NCN-H (3) and Fc-C{triple bond, long}C-NCN-H (5) (Fc = (η5-C5H5)(η5-C5 H4)Fe, NCN-H = C6H3(CH2NMe2)2-3, 5) can be used as precursors in the preparation of heterobimetallic transition metal complexes of structural type Fc-NCN-MX (NCN = [C6H2(CH2NMe2)2-2 ,6]-; MX = PdCl (7), PtCl (8), PtI (9)) and Fc-C{triple bond, long}C-NCN-MX (MX = PdCl (11), PdI (12), PtCl (13)), respectively. They are accessible by applying different synthesis procedures, including oxidative addition and metallation-transmetallation processes. Cyclovoltammetric studies show that the ferrocene moieties in 3, 5, 7-9 and 11-13 can reversibly be oxidised. The potential of the Fe(II)/Fe(III) redox couple decreases with increasing electron density at the NCN pincer unit. The use of 8 as a possible (electro)chemical sensor in the detection of SO2 is discussed as well. The solid-state structures of 8 and 13 are reported. The crystals of 8 contain two molecules of 8 in the asymmetric unit. The plane of the C6H2 moiety is with 27.2(3)° and 38.2(3)° tilted towards the C5H4 entity, while in 13 an angle of 45.9(3)° can be found. The d8-electron configured platinum atoms possess a somewhat distorted square-planar surrounding, setup by two Me2NCH2 ortho-substituents, the NCN Cipso carbon atom and the chloride ligand.
