Über gemischte bindungen in der IV. Hauptgruppe

Iso- and Homeostructuralism of Analogous Ph4E and Ph3E−E‘R3 Compounds (E = C, Si, Ge, Sn, Pb; E‘ = Si, Ge, Sn; R = Me, Ph): Crystal Structure of 1,1,1-Trimethyltriphenyldistannane

“…1) built up by achiral bipropellers. If one of the Ge atoms is replaced by Pb, then the asymmetric Ge−Pb group bearing six phenyl groups exhibits orientational disorder in a triclinic unit cell isomorphous with that of Ph 3 Ge−GePh 3 …”

“…In the monoclinic unit cell ( P 2 1 / c ; No. 14), there are two symmetry-independent molecules providing the optimum of close packing . The small (Δ = 0.06 Å) difference between the atomic radii of Sn and Pb provides ideal conditions for an orientational disorder developed by Ph 3 Pb−SnPh 3 molecules.…”

“…The increasing radii of the core atoms do not terminate their identical close packing. The analogous Ph 3 E−E‘Ph 3 derivatives (E = E‘ = Ge, Sn, Pb) also exhibit isostructuralism, but their packing relationship is modulated by additional pseudosymmetries and disorder …”

Reaction of an alkyne with dinickel-diphenylsilyl complexes. An emissive disilane formed via the consecutive Si–C and Si–Si bond-making processes

“…The Si1-Si2 bond (2.402(3) A ˚) is slightly longer than normal Si-Si bonds (2.33-2.37 A ˚), 17 but shorter than the bond of Ph 3 Si-SiPh 3 (2.519(4) A ˚). 18 The one Si-Si and two CQC bonds are included in the same plane with small C-C-Si-Si torsion angles (1.7(5)1 and 6.9(5)1). The conformation and elongation of the Si-Si bond may suggest intramolecular charge-transfer from the s(Si-Si) bond to the p*(CQC) bonds, which was proposed for the aryldisilanes by Kira,Sakurai,and Ishikawa.…”

New Pb–Pb bonds: syntheses and molecular structures of hexabiphenyldiplumbane and tri(trisbiphenylplumbyl)plumbate

“…{ Structurally characterized hexaaryldiplumbanes, (aryl) 3 Pb-Pb(aryl) 3 , are quite rare. Aside from 1, the literature reveals only hexaphenyldiplumbane, Ph 3 Pb-PbPh 3 (isolated from the reaction of Ph 3 PbCl with Ph 3 SiLi in THF) 8 and Ph 3 Pb-Pb(p-tol) 3 (isolated from the reaction of Ph 3 PbLi with (p-tol) 3 PbCl in THF). 9 A number of points regarding structure and bonding in 1 are noteworthy.…”