The crystal and molecular structure of oxobis[triphenylgermanium(IV)]

Synthesis of Tris(pentafluoroethyl)germanes

“…[19] The GeÀOs eparations of 175.0(2) pm and 174. 3(1) pm are also comparablew ith those in the trifluoromethyld erivative (172 pm), [16] but 2-3 pm shorter than in (H 3 Ge) 2 O( 176 pm), (Ph 3 Ge) 2 O( 176.5(3)/176.9(3) pm), [18] and [(CH 3 ) 3 Ge] 2 O( 177.0 pm). [19] The IR spectrum of [(C 2 F 5 ) 3 Ge] 2 Oi sc haracterizedb yt he fundamental vibrations of the (C 2 F 5 ) 3 Ge unit as derived from (C 2 F 5 ) 3 GeBr before.B ands at 984 and9 23 cm À1 are attributed to the antisymmetric Ge-O-Ge stretching vibration.…”

“…The Ge-O-Ge angle of 150.2(1)8 is well comparable to the one in [(CF 3 ) 3 Ge] 2 O (151.58). [16] This angle is more obtuse than in the nonfluorinated germanes( H 3 Ge) 2 O( 126.58), [17] (Ph 3 Ge) 2 O( 135.2(2)8) [18] and [(CH 3 ) 3 Ge] 2 O( 1418). [19] The GeÀOs eparations of 175.0(2) pm and 174.…”

Reaction of germanes and digermanes with triflic acid: The route to novel organooligogermanes

“…The GeeO bond length is sufficiently increased in comparison with related compounds containing GeeO bond (1.9225(17) vs. 1.86(1) Å in Ph 3 GeO 2 CCF 3 [20], 1.767(2) Å in (Ph 3 Ge) 2 O [21]) what denotes the significant ionic character of this bond in 6. Similar increasing the length of the covalent GeeO bond was found in pentacoordinated germanium compounds (for example, in C 10 H 6 (OMe)(Ge(H)(OTf)(NpOMe)), 1.988(3) Å [22]) where weakening covalent bonds are admitted.…”

C–F activation reactions at germylium ions: dehydrofluorination of fluoralkanes

“…5b,7 The Ge-O bond length in 3 of 1.923(2) Å is slightly longer than the distance in the hydroxo digermylium ion [(Me 3 Ge) 2 OH] + (1.897(4) and 1.903(4) Å) 5b and around 0.15 Å longer than the Ge-O bond in Ph 3 GeOH 7 or (Ph 3 Ge) 2 O. 8 Similar differences have been found for silicon analogues. 9 Additionally, the asymmetric unit shows a water molecule which binds via a hydrogen bond to the coordinated water molecule with a O-O separation of 2.492 Å.…”

“…All reactions were performed in orthodichlorobenzene-d 4 at room temperature for 5 min (4a: R = Et, 4b: R = Ph). (14); Ge1-C1 1.932(2); Ge1-C3 1.9324(19); Ge1-C5 1.932(2); C3-Ge1-C5 116.42 (9); C1-Ge1-C5 113.97 (9); C1-Ge1-C3 116.89 (9); C3-Ge1-O1 103.43 (8); C5-Ge1-O1 101.47 (8); C1-Ge1-O1 101.20 (8). product cyclohexene (Table 1) together with the corresponding fluorogermane species and dihydrogen.…”