Convenient Syntheses of Aryl and Perfluoroaryl Trichlorogermanes and Germatranes via an Organotin Route

Abstract

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Synthesis, Ionisation Potentials and Electron Affinities of Hexaazatrinaphthylene Derivatives

“…A mixture of 2,5-dibromo-3,4-dinitro-thiophene [54] (S1; 6.00 g, 18.08 mmol), 3,5-bis-trifluoromethyl-phenyl-tributyl-stannane (16.52 g, 36.15 mmol), [55] tris(dibenzylideneacetone) dipalladium (0.66 g, 0.72 mmol) and triphenylarsine (0.88 g, 2.88 mmol) in toluene (100 mL) was heated to 80 8C for 12 h under nitrogen. The mixture was cooled to room temperature and then a solution of potassium fluoride (30 mL, 2.0 m) was added.…”

Silver compounds in synthetic chemistry. Part 3. 4-Tetrafluoropyridyl silver(I), AgC5F4N – A reagent for redox transmetallations with group 12–14 elements

“…Results of the single crystal structure analyses of Ga(C 5 F 4-N) 3 AE EtCN AE H 2 O and In(C 5 F 4 N) 3 AE 2EtCN are presented in Sections 2.5 and 2.6, respectively. Elemental tin is oxidized by AgC 5 F 4 N in a primary step to a compound presumed to be ''Ag[Sn II (C 5 F 4 N) 3 ]'' [15].…”

“…The tetrafluoropyridyl group has already attracted considerable interest in transition metal [1,2] as well as main group metal chemistry [3]. On the basis of theoretical calculations [4], the electron-withdrawing effect of the C 5 F 4 N ligand should be considered to be higher than that of the isolobal C 6 F 5 group.…”

Synthesis and crystal structure of 1-(4-fluorophenyl)-and 1-(4-dimethylamino)phenylgermatranes

“…This bond is shorter for germatranes with C sp 2 substituents (aryl) but it is less influenced by the substituents in the aryl group, e.g. 2.156 for C 6 F 5 [3] and 2.212 Å for C 6 H 5 [3,4]. The difference is even smaller for monosubstituted arylgermatranes (Table 1).…”

“…For C sp 3 substituents (alkyl, cycloalkyl) it is in the range 2.24−2.27 Å [1] being the longest in 1-ada-mantylgermatrane (2.266 Å) [2]. Introduction of electronegative substituents into the alkyl group significantly shortens the N→Ge bond (2.167 for CH 2 Cl, 2.146 for CHCl 2 , and 2.108 Å for CF 3 ) [1]. This bond is shorter for germatranes with C sp 2 substituents (aryl) but it is less influenced by the substituents in the aryl group, e.g.…”