377776-73-3Relevant academic research and scientific papers
Preparation, properties, and reactions of metal-containing heterocycles: Part CV. Synthesis and structure of polyoxadiphosphaplatinaferrocenophanes
Lindner, Ekkehard,Kehrer, Ulf,Steimann, Manfred,Str?bele, Markus
, p. 266 - 274 (2001)
A series of novel heterobimetallic crown ether-like polyoxadiphosphaplatinaferrocenophanes cis-[1,1′-Fc(CH2O(CH2CH2O)nCH2CH2PPh2)2]PtCl2 (n=1-3) (4a-c) was synthesized in good yield by cyclization of the bis(phosphine) ligands 1,1′-Fc(CH2O(CH2CH2O)nCH2CH2PPh2)2 (n=1-3) (3a-c) and (PhCN)2PtCl2 under high dilution conditions in CH2Cl2. The bisphosphines 3a-c are obtained by reaction of the corresponding diols 1,1′-Fc(CH2O(CH2CH2O)nCH2CH2OH)2 (n=1-3) (1a-c) with: (i) CH3SO2Cl in CH2Cl2 and (ii) LiPPh2 in THF. Although the X-ray crystal structure of 4a shows that the cavity is large enough for the encapsulation of small metal cations, inclusion experiments of 4a-c with Group 1 cations, and Mg2+, or NH4+ in solution applying NMR titration and cyclovoltammetric methods reveal no evidence for the formation of host-guest complexes for 4a,b. In the case of 4c only the addition of Na+ or K+ leads to an insignificant effect.
