المؤلفون: |
White FD; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States., Gaiser AN; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States., Warzecha EJ; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States., Sperling JM; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States., Celis-Barros C; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States., Salpage SR; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States., Zhou Y; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States., Dilbeck T; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States., Bretton AJ; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States., Meeker DS; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States., Hanson KG; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States., Albrecht-Schmitt TE; Department of Chemistry and Biochemistry , Florida State University , Tallahassee , Florida 32306 , United States. |
مستخلص: |
M(TpyNO 2 )(NO 3 ) 3 (H 2 O)·THF (M = La, Nd, Sm, Eu, Tb, Am; TpyNO 2 = 4'-nitrophenyl terpyridyl) have been prepared from the reaction of M(NO 3 ) 3 · nH 2 O with TpyNO 2 in THF. Structural analysis shows that the metal centers are 10-coordinate, providing the first example of Am III with this coordination number. Further spectroscopic and theoretical evaluation of these complexes reveals utilization of the 5f orbitals in bonding in the Am III complex. Comparison of Nd-L, Eu-L, and Am-L bond distances demonstrates that some caution should be taken in comparing Eu III versus Am III in extraction experiments. |