Tetrakis germanium

Perfluoroalkylgermanium derivatives, like tetrakis(trifluoromethyl)germanium, can be prepared by fluorination of organogermanium compounds280 ... 

It should also be noted here that recent work in Japan has shown that a free germanium cation can be prepared and structurally characterized. Thus, the reaction of tetrakis (tri-z-butylsilyl)cyclotrigermene with trityl tetraphenylborate affords (t-Bu3SiGe)3+ BPI14 as a yellow crystalline solid. X-ray crystallography shows that there is no close interaction between the anion and the cation. The stability of the compound is presumably due not only to the steric protection afforded by the bulky t-BtcSi substituents, but also to the fact that it contains a 2jr-electron aromatic ring.198... 

Similarly, a primary — CH2F fluorine adjacent to silicon is shielded by about 50 ppm compared to the respective hydrocarbon, with similar tin or germanium compounds being shielded slightly less. The value of -277 ppm observed for tetrakis(fluoromethyl)silane has the largest chemical shift known for a single carbon-bound fluorine (Scheme 3.40). 

Azarian, D., Dua, S. S., Eaborn, C., Walton, D. R. M. Reactions of organic halides with R3MMR3 compounds (M = silicon, germanium, tin) in the presence of tetrakis(triarylphosphine)palladium. J. Organomet. Chem. 1976,117, C55-C57. 

Wrackmeyer et prepared tetrakis(trimethylstannyl)germanium (131) and studied this compound by Ge and Sn NMR spectroscopy. Quadrupolar relaxation of the Ge nucleus is slow, which allows one to measure 7( Sn- Ge) = 37 Hz and to determine its positive sign by a 2D heteronuclear Ge- H shift con-elation. The absolute... 

Germanium(II) sulfide, 4419 Gold(lll) sulfide, 0116 Iron disulfide, 4401 Iron(ll) sulfide, 4400 Iron(lll) sulfide, 4404 Mangancse(II) sulfide, 4706 Manganese(IV) sulfide, 4707 Mercury (II) sulfide, 4607 Molybdcnum(IV) sulfide, 4719 Potassium sulfide, 4670 Rhenium(VII) sulfide, 4891 Ruthcnium(IV) sulfide, 4895 Samarium sulfide, 4899 Silver sulfide, 0026 Sodium disulfide, 4812 Sodium polysulfide, 4813 Sodium sulfide, 4811 Strontium sulfide, 4901 Tantalum(lV) sulfide. 4903 Tetrakis(butylthio)uranium, 3731 Thorium oxide sulfide, 4826 Tin(II) sulfide, 4900 Tin(IV) sulfide, 4902 Titanium(IV) sulfide, 4904 Uranium (IV) sulfide, 4905 Zirconium oxide sulfide, 4827... 

Germanium nitride, Ge3N4, is formed by the PECVD of germanium tetrakis(dime-thylamide) at temperatures as low as 190°C [181]. 

CsaH oGeNi, Tetrakis(diphenylketimine)germanium, 41B, 1242 CsaHnoN Sn, Tetrakis(diphenylketimine)tin, 41B, 1242 C5sNOaSni, Nitratotris(triphenylstannyl)tin(IV), 41B, 811 43B,... 

Silicon, Germanium, Tin, and Lead.—Ihe mass spectra of the tetrakis(penta-fluorophenyl) derivatives (CgFs)4M (M = Si, Ge, Sn, or Pb) have been studied. Rearrangements involving transfer of fluorine to metal, with or without charge, are prevalent. The heavier metal species give simpler spectra, and the bulk of the ion current is carried by fluorocarbon ions for the silicon compound and by metal-containing ions, particularly MF, for the other compounds. ... 

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