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1744897 
Journal Article 
Synthesis and structure of Zn(HSO4)2(H2SO4)(2) and Cd(HSO4)(2) 
Kemnitz, E; Werner, C; Stiewe, A; Worzala, H; Trojanov, S 
1996 
1 
Zeitschrift für Naturforschung B
ISSN: 0932-0776 
51 
1 
14-18 
WOS:A1996TW06400003 
From the binary systems M(2)SO(4)/H2SO4 (M = Zn, Cd), two new hydrogen sulfates, (Zn(HSO4)(2)(H2SO4)(2) and Cd(HSO4)(2), have been synthesized and structurally characterized. Both compounds crystallize in the monoclinic space group P2(1)/c with cell parameters a = 5.047(2), b = 15.430(4), c = 7.958(3) Angstrom and beta = 104.16(4)degrees (Z = 2) for Zn(HSO4)(2)(H2SO4)(2) and a = 5.339(1), b = 13.351(3), c = 8.508(2) Angstrom and beta = 92.22(3)degrees (Z = 4) for Cd(HSO4)(2). In the zinc compound there are slightly distorted centrosymmetric ZnO6 octahedra with Zn-O distances of 2.05 - 2.13 Angstrom which are sharing corners with SO4 tetrahedra. HSO4 and H2SO4 tetrahedra are linked via hydrogen bonds to form layers perpendicular to the c-axis.



In the crystal structure of Cd(HSO4)(2) there exist two crystallographically different HSO tetrahedra. The CdO6 octahedra with Cd-O distances between 2.24 and 2.31 Angstrom are strongly angle-distorted. Besides hydrogen bonds of medium strength (d(O ... O) = 2.66 Angstrom) there are also much more weaker ones (d(O ... O) = 3.04 Angstrom). Considering these latter ones zigzag chains in z-direction can be recognized.



The relatively low stability of Cd(HSO4)(2) in comparison wi th other metal-II-hydrogen sulfates is discussed with respect to its structural pecularities. 
synthesis; crystal structure; zinc; cadmium; hydrogen sulfate