343. Organogermanium polymers

Preparation and Properties of Diethyl(diphenylphosphinyl)aluminium

“…This observation is somewhat surprising in view of the acidity of the aluminium atom. I-Iowever, credence was lent to our observation by the recent report that Et3Ge-P(13h)z reacted similarly, affording n-butyltriethylger~nane and the diphenylphosphide ion (19).…”

“…Again the reaction is not unique for the aluminiui11-phosphorus system since Et3Ge-P(Ph)z was cleaved in a n analogous manner (19). These cleavages inost likely occurred by initial quaternization of the phosphorus atom followed by nucleophilic attack of the iodide on the aluminium or germanium atom (eq.…”

Development of novel and efficient synthesis of group 14 element (Ge and Sn) catenates by use of samarium (II) diiodide

“…All solvents of column chromatography and the other commercial reagents were used without purification. Compounds Et 3 GeCl [14], Et 3 [20], (Et 3 Ge) 2 [21], (n-Bu 3 Ge) 2 [21], (i-Pr 3 Ge) 2 [22], (Ph 2 MeGe) 2 [23], Me 3 GeGeBu 3 [21], Et 3 GeGePh 3 [24], Me 2 GeCl 2 [25], Et 2 GeCl 2 [26], Me 2 SnCl 2 [27], Et 2 SnCl 2 [28], Bu 2 SnCl 2 [29], Hex 2 SnCl 2 [30], (Me 3 Ge) 2 GePh 2 [31], (Et 3 Sn) 2 GePh 2 [32], (Et 2 Ge) n [9f], and (Et 2 Sn) n [13] were prepared in accordance with reported procedures. THF solution of SmI 2 (0.1 mol/dm 3 ) was prepared according to the literature [33].…”

“…This ether eluate was evaporated and purified by silica gel (hexane only) to give compound Et 3 GeGeEt 3 (17.5 mg, 73%). This digermane was identified by comparison with an authentic compound (GC-MS and 1 H NMR) which was described in the literature [22].…”

Absorption, electrochemical, theoretical, and 73Ge NMR spectral characterization of the germanium neo-pentane analogue (Me3Ge)4Ge

“…The preparation of (Ph 3 Ge) 3 GeH (1) and (Ph 3 Ge) 3 GeMe was first reported in 1963 [6], and the compounds (PhCl 2 Ge) 3 GePh [7] and (PhX 2 Ge) 3 GePh (X ¼ Me, MeO, MeS, Me 2 N, Et 2 P) [8] were reported in the early 1970s. In light of the successful use of the hydrogermolysis reaction for the stepwise synthesis of linear oligogermanes, we have used this method for the synthesis of the branched oligogermanes (Ph 3 Ge) 3 GeH (1) [4,5] and (Ph 3 Ge) 3 GePh (2) [2].…”