Steric Effects on Uranyl Complexation: Synthetic, Structural, and Theoretical Studies of Carbamoyl Pyrazole Compounds of the Uranyl(VI) Ion
作者:Debasish Das、Shanmugaperumal Kannan、Dilip K. Maity、Michael G. B. Drew
DOI:10.1021/ic300398a
日期:2012.4.16
was studied with infrared (IR), 1H NMR, electrospray-mass spectrometry (ES-MS), elemental analysis, and single crystal X-ray diffraction methods. The structure of compound [UO2(NO3)2(C3H3N2CONC2H5}2)] (2) shows that the uranium(VI) ion is surrounded by one nitrogen atom and seven oxygen atoms in a hexagonal bipyramidal geometry with the ligand acting as a bidentate chelating ligand and bonds through
制备并表征了[C 3 HR 2 N 2 CONR']类型的新的基于双官能吡唑的配体(其中R = H或CH 3; R'= CH 3,C 2 H 5或i C 3 H 7)。通过红外(IR),1 H NMR,电喷雾质谱(ES-MS),元素分析和单晶X射线衍射方法研究了这些配体与硝酸铀酰和铀酰双(二苯甲酰甲烷酸酯)的配位化学。化合物[UO 2(NO 3)2(C 3 H 3)的结构N 2 CON C 2 H 5 } 2)](2)显示,在六角形双锥体几何结构中,铀(VI)离子被一个氮原子和七个氧原子包围,该配体充当双齿螯合配体并通过氨基甲酰氧和吡唑基氮原子。在[UO 2(NO 3)2(H 2 O)2(C 5 H 7 N 2 CON C 2 H 5 } 2)2 ]的结构中,(5)吡唑配体充当第二球配体,并通过氨基甲酰氧和吡唑基氮原子与水分子形成氢键。的结构[UO 2(DBM)2 C ^ 3 ħ 3 Ñ