1381886-08-3Relevant academic research and scientific papers
Synthesis and coordination chemistry of phosphine oxide decorated dibenzofuran platforms
Rosario-Amorin, Daniel,Duesler, Eileen N.,Paine, Robert T.,Hay, Benjamin P.,Delmau, Laetitia H.,Reilly, Sean D.,Gaunt, Andrew J.,Scott, Brian L.
, p. 6667 - 6681 (2012)
A four-step synthesis for 4,6-bis(diphenylphosphinoylmethyl)dibenzofuran (4) from dibenzofuran and a two-step synthesis for 4,6-bis(diphenylphosphinoyl) dibenzofuran (5) are reported along with coordination chemistry of 4 with In(III), La(III), Pr(III), Nd(III), Er(III), and Pu(IV) and of 5 with Er(III). Crystal structure determinations for the ligands, 4·CH3OH and 5, the 1:1 complexes [In(4)(NO3)3], [Pr(4)(NO 3)3(CH3CN)] ·0.5CH3CN, [Er(4)(NO3)3(CH3CN)]·CH3CN, [Pu(4)Cl4]·THF and the 2:1 complex [Nd(4)2(NO 3)2]2(NO3)2· (H2O)·4(CH3OH) are described. In these complexes, ligand 4 coordinates in a bidentate POP′O′ mode via the two phosphine oxide O-atoms. The dibenzofuran ring O-atom points toward the central metal cations, but in every case it is more than 4 A from the metal. A similar bidentate POP′O′ chelate structure is formed between 5 and Er(III) in the complex, {[Er(5)2(NO3)2](NO 3)·4(CH3OH)}0.5, although the nonbonded Er...Ofuran distance is reduced to ～3.6 A. The observed bidentate chelation modes for 4 and 5 are consistent with results from molecular mechanics computations. The solvent extraction performance of 4 and 5 in 1,2-dichloroethane for Eu(III) and Am(III) in nitric acid solutions is described and compared against the extraction behavior of n-octyl(phenyl)-N,N- diisobutylcarbamoylmethyl phosphine oxide (OφDiBCMPO) measured under identical conditions.
