Extraction and coordination studies of carbamoyl methyl sulfoxide (CMSO) with uranyl bis(β-diketonates). Synthesis and molecular structure of [{UO2(DBM)2}2C6H5CH2SOCH2CONHC6H5]
作者:S. Kannan、K.V. Chetty、A. Usman、H.K. Fun
DOI:10.1016/j.poly.2006.11.019
日期:2007.5
The carbamoyl methyl sulfoxide compounds of uranyl bis(O-diketonate) of the types [UO2(DBM)(2)CMSO] and [UO2(DBM)(2)}(2)CMSO] (where HDBM = C6H5COCH2COC6H5; CMSO = C6H5CH2SOCH2C6NHC6H5 or (C6H5SOCH2CONPr2)-Pr-i) have been synthesized and characterized by IR and NMR spectroscopic techniques and elemental analysis. Spectral studies show that CMSO acts as a monodentate ligand in [UO2(DBM)(2)CMSO] compounds and bonds through the sulfoxo oxygen atom to the uranyl group. It acts as a bridging bidentate ligand in [UO2(DBM}(2))(2)CMSO] compounds and bonds through both the sulfoxo and carbamoyl oxygen atoms to two different uranyl groups. The structure of the compound [UO2(DBM)(2)}(2)C6H5CH2SOCH2CONHC6H5] confirms the bridging bidentate mode of coordination for the CMSO ligand. Extraction studies show an enhancement in solvent extraction for the uranyl ion from nitric acid medium when a mixture of thenoyl trifluoroacetone (HTTA) and CMSO was employed. (C) 2006 Elsevier Ltd. All rights reserved.