Synthesis and Crystal Structure of {(Eu2Cd2)-Cd-III}, {(Tb2Cd2)-Cd-I-Cd-II} and {(Eu2Zn2)-Zn-III} Complexes with Pentafluorobenzoic Acid Anions and Acetonitrile

摘要

Methods for the synthesis were developed and new homo- and heterometallic cadmium Eu2Cd2(MeCN)(4)(C6F5COO) (I), Tb2Cd2(MeCN)(6)(C6F5COO)(10)center dot 4MeCN (II)) and zinc (Zn(H2O)(C6F5COO)(2) (III), Eu2Zn2(MeCN)(4)(C6F5COO)(10) (IV)) complexes were characterized. These complexes can be used as precursors for the synthesis of compounds with N-donor ligands. Complexes I and II differ in the coordination of the MeCN molecule, which is coordinated in II by each Tb3+ ion. Also, additional coordination of MeCN induces a greater distortion of the {Tb2Cd2} metal core of II. The crystal packing in I-IV is stabilized by numerous intermolecular O center dot center dot center dot H, F center dot center dot center dot F, C-H center dot center dot center dot F, and C-H center dot center dot center dot O contacts. The new compounds were characterized by single crystal X-ray diffraction (CCDC no. 2076524 (I), 2082731 (II), 2082803 (III), 2076525 (IV)), IR spectroscopy, C,H,N elemental analysis, and powder X-ray diffraction.