“…The supernate was chromatographed over Florisil (CH2C12 eluent) to give several fractions. The only fraction identified was the fust, which gave a trace amount of brown crystals whose spectral properties are consistent with their formulation q,q-bis(dimethylgermylene)-bis(cyclopentadienyldicarbonylchromium), 13. The mass spectrum (165°, 20 eV) shows a parent molecule ion at m/e 552 (/ = 25) and stepwise loss of four carbonyls.…”