Abstract
A unique hybrid borotungstate, [Cu(En)(Phen)(H2O)]4[α-BW12O40]{[Cu(En)(Phen)]2[Cu(En)2 · (H2O)]2[Cu(En)(Phen)(H2O)]2[α-BW12O40]3]} sd 10H2O (I) (Phen = 1,10-phenanthroline, En = ethylenediamine), has been hydrothermally synthesized and characterized by elemental analyses, IR, and UV spectra, powder X-ray diffraction, thermogravimetric analysis, X-ray photoelectron spectroscopy, and singlecrystal X-ray diffraction analysis. X-ray crystallography shows that I contains a discrete saturated Keggin-type [BW12O40]5− polyoxoanion and a rare trimeric saturated Keggin-type polyoxoanion {[Cu(En)(Phen)]2[Cu(En)2(H2O)]2[Cu(En)(Phen)(H2O)]2[α-BW12O40]3]}3−. It is noteworthy that I represents the first example of borotungstate containing four saturated Keggin-type units in one molecule.
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