VIBRATIONAL-SPECTRA OF SOLID CRF4 AND OF 3 NEW FLUOROCHROMATE(IV) COMPLEXES WITH XE FLUORIDES, XEF2.CRF4, (XEF5-)4.XEF4 AND XEF5+CRF5-(CRF5)

Spectra of solid CrF4 show bands assigned to stretching vibrations of terminal and bridging fluorine atoms, indicating a polymeric structure . The beginning of ionization of XeF2 is revealed in the spectra of Xe F2.CrF4. The number of Cr-F terminal and bridging stretching bands tal lies with the known X-ray diffraction structure. Spectra of (XeF5+CrF5 -)4 XeF4 disclose slight interactions of XeF4 in the lattice and are c haracteristic for deformed XeF5+ ions in structures with polymeric flu orometallate anions. Similar spectra, but with XeF4 bands absent, indi cate distorted XeF5+ and polymeric chains of deformed fluorochromate(I V) octahedra in the structure of XeF5+CrF5-.