X-ray diffraction study of R (2)[UO2(C3H2O4)(2)] center dot H2O (R = K or Rb)

作者：Serezhkina L B^*; Grigor'ev M S; Kuz'menko I S; Serezhkin V N

来源：Crystallography Reports, 2012, 57(2): 258-263.

DOI：10.1134/S1063774512020198

Compounds K-2[UO2(C3H2O4)(2)] center dot H2O (I) and Rb-2[UO2(C3H2O4)(2)] center dot H2O (II) are synthesized and their crystal structures are determined by X-ray diffraction. The compounds crystallize in the monoclinic crystal system; for I, a = 7.1700(2) , b =12.3061(3) , c = 14.3080(4) , beta = 95.831(2)A degrees, space group P2(1)/n, Z = 4, and R = 0.0275; for II, a = 7.1197(2) , b = 12.6433(4) , c = 14.6729(6) , beta = 96.353(2)A degrees, space group P2(1)/n, Z = 4, and R = 0.0328. It is found that I and II are isostructural. The main structural units of the crystals are the [UO2(C3H2O4)(2)](2-) chains, which belong to the AT (11) B (01) (A = UO (2) (2+) , T (11), and B (01) = C3H2O (4) (2-) ) crystal chemical group of uranyl complexes. The chains and alkali metal ions R (R = K or Rb) are connected by electrostatic interactions and hydrogen bonds. Some specific structural features of [UO2(C(3)H(2)O4)(2)](2-) complex groups are discussed.

• 出版日期2012-3