Abstract
Two basic halides of
molybdenum(111), namely MoOF(H2O)3 and
MoOCl(H2O)3 (some samples
containing additional loosely bound water), were investigated by absorption
spectroscopy in the range 200-50000 cm-1, and by magnetic
susceptibility measurements over a temperature range of 100-300 K. Infrared
spectra showed bands at about 670 and 1600 cm-l, but not in the
range 800-1100 cm-1. Electronic spectra showed poorly defined bands
superimposed on strong general absorption. Very weak paramagnetism
was observed: this was field dependent. The results are interpreted to show the
compounds to be oxygen-bridged polymers [MOX(H2O)3O]n,
rather than species containing Mo=O or Mo-0-H groups.
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