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Infrared spectra of new Re(III) complexes with thiourea derivatives.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy (2003-01-04)
Dinorah Gambino, Eduardo Kremer, Enrique J Baran
ABSTRACT

Complexes of the type [Re(III)L6]X3, with L = thiourea, N-methylthiourea, N-ethylthiourea or N,N'-dimethytlthiourea and X = Cl- or PF6-, were prepared as suitable precursors for the synthesis of new rhenium complexes potentially useful in nuclear medicine. The infrared (IR) spectra of these complexes were recorded and analyzed and a general vibrational pattern for Re(III) complexes with thiourea derivatives could be established. Approximate assignments for N-allylthiourea and N-ethylthiourea are also proposed for the first time. The synthesis of the new complex [Re(III)(N-allylthiourea)6](PF6)3 is also reported, and information about its structural characteristics was obtained comparing its IR spectrum with those of the other complexes of the investigated series.

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N-Ethylthiourea, 99%
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