Photodecompostion of the Oligogermanes nBu3GeGePh2GenBu3 and nBu3GeGePh3: Identification of the Photoproducts by Spectroscopic and Spectrometric Methods

Abstract

The oligogermane nBu 3 GeGePh 2 GenBu 3 was photolyzed using UV-C light in the presence of acetic acid as a trapping agent and the photoproducts were identified using 1 H NMR spectroscopy, gas chromatography/electron-impact mass spectrometry, and high resolution accurate mass mass spectrometry. The products identified were the germanes nBu 3 GeH, nBu 3 GeOAc, and Ph 2 Ge(H)OAc (OAc = C 2 H 3 O 2 ) and the diger- [a]

Competing reaction pathways of 3,3,3-trifluoropropene at rhodium hydrido, silyl and germyl complexes: C–F bond activation versus hydrogermylation

“…(nBu) 3 GeGe(nBu) 3 was identified as side product by comparison with literature data and by GC-MS analysis of the reaction mixtures. 164 (b) In a Young NMR tube [Rh(GePh 3 )(PEt 3 ) 3 ] (3) (5.2 mg, 6.83 µmol) and HGe(nBu) 3 (80 µL, 0.340 mmol) were dissolved in [D 8 ]toluene (0.3 mL). The solution was cooled to 77 K, degassed in vacuo, and pressurized with 3,3,3-trifluoropropene to 1 atm.…”

A Series of Isopropyl-Substituted Oligogermanes Pri3Ge(GePh2)nGePri3 (n = 0–3) Featuring a Luminescent and Dichroic Pentagermane Pri3Ge(GePh2)3GePri3

“…The presence of aryl substituents presumably stabilizes the species that are generated after the oxidation event takes place such they can also be oxidized as the sweep continues to more positive potential. Photochemical investigations of oligogermanes indicate that both homo- and heterolytic cleavage of the germanium–germanium bond can occur to generate radicals and germylenes, respectively. ,,− Recently, it has been shown that the germanium–germanium bonds in the trigermane 8 and the digermane Bu n 3 GeGePh 3 undergo homolytic cleavage upon irradiation with UV–C light to generate germanium radicals . It is possible that a similar process may be occurring electrochemically, where homolytic Ge–Ge bond scission is occurring after oxidation of the oligogermanes to yield germanium-based radical species.…”

Selective Chlorination of Germanium Hydrides

“…[ 3 ] Regardless of a wealth of possible applications, however, the use of organohydrido, ‐chloro and mixed germanium species has to date received only little attention, presumably because of a limited range of preparation methods. Since the early 70s, organo(chloro)germylhydrides (RGeCl n H 3– n , R = alkyl, aryl; n = 1–3) have been employed as reagents in the preparation of various organogermanium derivatives, ranging from germylamines, [ 4 ] arylhydridogermyllithiums, [ 5 ] acetylide and silylide germylenes, [ 6 ] transition metal coordinated germane complexes, [ 7 ] germyl esters, [ 8 ] among others. [ 2a,9 ] In addition, organo(chloro)germylhydrides have displayed utility in forming oligo‐ and polygermanes, therefore providing an avenue for exciting germanium chemistry.…”