Crystal Structures of Extended Europium Cyanamide-Carbodiimide Compounds Derived from Different Reaction Conditions: Temperature-Controlled Syntheses of In0.08Eu4(NCN)3I3, Eu8I9(CN)(NCN)3, and In0.28Eu12(NCN)5I14.91

Inorg. Chem., 45 (10), 3828 -3830, 2006. 10.1021/ic051899u S0020-1669(05)01899-9
Web Release Date: April 8, 2006

Crystal Structures of Extended Europium Cyanamide-Carbodiimide Compounds Derived from Different Reaction Conditions: Temperature-Controlled Syntheses of In_0.08Eu₄(NCN)₃I₃, Eu₈I₉(CN)(NCN)₃, and In_0.28Eu₁₂(NCN)₅I_14.91

Wuping Liao and Richard Dronskowski*

Institut für Anorganische Chemie der RWTH Aachen, Landoltweg 1, D-52056 Aachen, Germany

Received November 2, 2005

Abstract:

A different thermal treatment of identical reactants (EuI₂, NaCN, NaN₃, and InI) leads to the formation of the three title compounds. In_0.08Eu₄(NCN)₃I₃ is isotypic with the reported LiEu₄(NCN)₃I₃, Eu₈I₉(CN)(NCN)₃ represents the first mixed cyanide-cyanamide rare-earth compound, and In_0.28Eu₁₂(NCN)₅I_14.91 is characterized by a sandwichlike stacking motif involving Eu₄-NCN double layers stuffed by a layer of vertex-sharing InI₆ octahedra. The redox behavior of In is the main factor that leads to alternative product formation as a function of the temperature.

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