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M(benzo‐18‐crown‐6)I 4 (M = Cd, Hg): Tetraiodide, Iodide–Iodine Adduct, or an Inclusion Compound of Iodine in MI 2 @(benzo‐18‐crown‐6)?
Author(s) -
Striebinger Ralph,
Walbaum Christine,
Pantenburg Ingo,
Meyer Gerd
Publication year - 2008
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.200800224
Subject(s) - iodine , chemistry , orthorhombic crystal system , iodide , acetonitrile , adduct , molecule , crystal structure , nuclear chemistry , inorganic chemistry , crystallography , organic chemistry
M(benzo‐18‐crown‐6)I 4 (M = Cd, Hg) are obtained as red columnar crystals from the reactions of benzo‐18‐crown‐6 (b18c6), cadmium and mercury iodide, respectively, and iodine in molar ratios of 1:1:2 in acetonitrile. They both crystallize with the orthorhombic crystal system, P2 1 2 1 2 1 , a = 833.7(1), b = 1610.9(1), c = 1846.8(1) pm, V = 2480.3(1) 10 6 ·pm 3 , Z = 4, for M = Cd and a = 823.4(1), b = 1616.5(1), c = 1866.1(1) pm, V = 2483.8(2) 10 6 ·pm 3 for M = Hg. The crystal structures consist of [M(b18c6)]I 2 molecules which are connected to a slightly lengthened iodine molecule via a secondary contact, according to the formulation I 2 @[MI 2 @(b18c6)].