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Tetrahedra and Vertex‐Sharing Double Tetrahedra in the Ammonium Iodomercurates(II) (NH 4 ) 7 [HgI 4 ] 2 [Hg 2 I 7 ](H 2 O) and (NH 4 ) 3 [Hg 2 I 7 ]
Author(s) -
Nockemann Peter,
Pantenburg Ingo,
Meyer Gerd
Publication year - 2006
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200600133
Subject(s) - tetrahedron , orthorhombic crystal system , monoclinic crystal system , crystallography , vertex (graph theory) , crystal structure , ammonium , chemistry , physics , combinatorics , mathematics , graph , organic chemistry
The new ammonium iodomercurates(II), (NH 4 ) 7 [HgI 4 ] 2 [Hg 2 I 7 ](H 2 O) ( 1 ) and (NH 4 ) 3 [Hg 2 I 7 ] ( 2 ) contain isolated tetrahedra and vertex‐sharing double tetrahedra as the anions. The crystal structures were determined from single‐crystal X‐ray diffraction data: 1 : orthorhombic, Pnma (no. 62), a = 2175.9(2), b = 1781.8(2), c = 1256.2(2) pm, Z = 4. R 1 [I 0 >2σ(I 0 )] = 0.0520; 2 : monoclinic, P2 1 /c (no. 14), a = 1259.0(2), b = 773.2(1), c = 2172.4(3) pm, β = 101.18(2)°, Z = 4, R 1 [I 0 >2σ(I 0 )] = 0.0308.