Reactions of cyclotrigermane and germylenes with carbonyl compounds: Cycloadducts and oligomers

Singly Bonded Catenated Germanes: Eighty Years of Progress

“…142 The rate constants for the quenching of Mes 2 Ge: in the presence of O 2 ((7.3 ( 0.8) × 10 6 ), Et 3 SiH ((1.1 ( 0.1) × 10 5 ), and C 6 H 11 Br ((5.4 ( 0.5) × 10 5 ) have been determined. 146 The photolysis or thermolysis of 62b in the presence of various carbonyl compounds yields a variety of products (Scheme 31), 147 and the reaction pathway was shown to involve the formation of radical intermediates. The structure of one of the products (66) was determined that has a highly distorted six-membered ring with a slightly elongated Ge-Ge bond distance of 2.456(2) Å.…”

Syntheses, Structures, and Electronic Properties of the Branched Oligogermanes (Ph3Ge)3GeH and (Ph3Ge)3GeX (X = Cl, Br, I)

“…digermene Mes 2 GedGeMes 2 . [21][22][23][24][25][26][27][28][29][30][31][32][33][34] A number of compounds containing Ge-Ge multiple bonds have also been reported. [35][36][37][38][39][40][41][42][43][44][45][46][47] The synthetic methods employed for the synthesis of linear singly bonded oligogermanes were often complicated by low yields and/or the formation of product mixtures.…”

Synthetic, Structural, and Physical Aspects of Organo-Oligogermanes

“…In addition to the aforementioned linear systems, the chemistry of the cyclic trigermane (Mes 2 Ge) 3 has also been extensively investigated and it has been demonstrated that upon photolysis this species behaves as both a digermene and a germylene. [52][53][54][55][56][57][58][59][60][61][62][63][64][65][66] However, in contrast to the linear and cyclic oligogermanes the corresponding branched systems are relatively obscure. Prior to 2008, only a handful of these materials had been reported, including (Ph 3 Ge) 3 GeH, [72] (Ph 3 Ge) 3 GeMe, [72] (PhCl 2 Ge) 3 GePh, [73] (PhMe 2 Ge) 3 -GePh, [73] and (Ph(X) 2 Ge) 3 GePh (X = MeO, MeS, Me 2 N, Et 2 P).…”