Combined electron diffraction/mass-spectrometric investigation of the molecular structure of germanium dichloride

Insertion of Cp*GeCl into a Tungsten−Chlorine Bond and Crystal Structures of the Germylenes Cp*GeCl, [Cp*GeBr]2, and [Cp*Ge][BF4] (Cp* = Pentamethylcyclopentadienyl)

“…The Ge−Cl bond of 2 is with 2.3841(8) Å remarkably long. Thus, this bond is longer than that found for 2 in the gas-phase [Ge−Cl = 2.26(1) Å] and also longer than the Ge−Cl bonds of other germanium(II) chlorides, such as GeCl 2 (g) [Ge−Cl = 2.186(4) Å], GeCl 2 (1,4-dioxane) (average Ge−Cl = 2.265 Å),2b [(C 6 H 3 -2,6-Mes 2 )GeCl] 2 [Ge−Cl = 2.120(2) Å],4i RbGeCl 3 [average Ge−Cl = 2.313(4) Å], [NMe 4 ][GeCl 3 ] [average Ge−Cl = 2.294(7) Å], and [HPMe 3 ][GeCl 3 ] [average Ge−Cl = 2.3071(9) Å] . The Ge−Cl bond of 2 compares well only with that of the germanium(II) compounds (C 5 Me 4 CH 2 CH 2 NMe 2 )GeCl [Ge−Cl = 2.369(1) Å] 13 and (C 5 H 4 CH 2 CH 2 NMe 2 )GeCl [Ge−Cl = 2.381(1) Å], for which intramolecular coordination of the amino functionality in the side chain of the cyclopentadienyl ligand to the germanium atom has been shown to weaken drastically the Ge−Cl bond.…”

Molecular Structure of Metal Halides

“…This has already been discussed in connection with thallium(I) compounds (see section II.E.1) . Coordination number 4 is still common for germanium; its dihalides are unstable, and their experimental study required special conditions. − …”

Gas-Phase Characterization by Photoelectron Spectroscopy of Unhindered, Low-Coordinate Germanium Compounds: Germaimines, Germylenes, and Germaisonitriles1

“…The GeN bond length calculated (1.857 Å) is slightly shorter than those in : Ge(N(SiMe 3 )) 2 ( R Ge-N = 1.89 Å) . Conversely, the GeCl bond is longer (2.28 Å) than those in the symmetrical compound : GeCl 2 ( R Ge - Cl = 2.183 Å). , …”

“…29 Conversely, the GeCl bond is longer (2.28 Å) than those in the symmetrical compound :GeCl 2 (R Ge-Cl ) 2.183 Å). 27,28 The ionization energies evaluation is presented in Table 2. According to the number of heavy atoms in 3b′ and the large basis set used, we have only evaluated the first 2 A′′ ionic state energy.…”