Ein neutraler η⁵‐Aminoborol‐Germanium(II)‐Komplex

Abstract

Die Synthese von zwei h 5 -Aminoborol-Germanium(II)-Komplexen aus der Reaktion eines Germoldianions mit Aminobordichloriden wird beschrieben. Diese Reaktion liefert ein bemerkenswertes Beispiel füre ine Germol-zu-Borol-Transformation. Die beiden Aminoborol-Germanium-(II)-Komplexe wurden vollständig durchH eterokern-NMR-, IR-Spektroskopie,HR-Massenspektrometrie und in einem Fall durch Rçntgenkristallographie charakterisiert. Die Ergebnisse quantenmechanischer Rechnungen favorisieren die elektronische Struktur eines Halbsandwich-Komplexes von Ge II gegenüber einer ionischen Darstellung eines Germanium-Dikations,w elches durch ein aromatisches Aminoboroldianion stabilisiert wird.

Bonding Relationship between Silicon and Germanium with Group 13 and Heavier Elements of Groups 14–16

“…After an interval of 10 years, Iwamoto and co-workers [49] reported the potassium salt of a chloride adduct of base free borasilene (56). The reaction between dialkylsilylene (57) and MesBCl 2 in hexane gave 58.…”

“…The compounds having > Ge=BÀ double bond (as an intermediate) was first reported in 2005. [47] In 2018, [56] during the synthesis of a neutral η 5 -aminoborole complex of germanium (II), a Ge=B double-bonded intermediate was proposed to form, but not been isolated. Finally, in 2019 the first structurally characterized compound having > Ge=BÀ double bond was reported by Kinjo et al [57] The reaction of the cyclic (alkyl)(boryl)germylene-PMe 3 adduct (67) with bis(trimethylsilyl)aminodichloroborane ((Me 3 Si) 2 NBCl 2 ) in toluene gave a GeÀ B single-bonded compound 68, via the insertion of 67 into BÀ X bond.…”

“…The compounds having >Ge=B− double bond (as an intermediate) was first reported in 2005 [47] . In 2018, [56] during the synthesis of a neutral η 5 ‐aminoborole complex of germanium(II), a Ge=B double‐bonded intermediate was proposed to form, but not been isolated.…”

A donor-supported silavinylidene and silylium ylides: boroles as a flexible platform for versatile Si(ii) chemistry

“…39 We recently reported a synthetic route to a series of 2,5-disilyl-3,4-diaryl boroles [(Ar2TMS2C4)B-R, A/B-R] (backbone system A: Ar = Xyl = 3,5-Me2(C6H3); B: Ar = Ph* = 3,5-t Bu2(C6H3), Chart 1) and successfully applied boroles as a dianionic, [Cp] --mimicking ligand for E(+II) coordination chemistry. 17,[40][41][42][43] In the following discussion of compounds, all product numbers will be accompanied by the borole identifier from which they derive. The Si(II) half-sandwich nido-type cluster compound 4B-Ph* has been reported to be formed by the reaction of the borolediide [B-Ph*] 2with two equivalents of Jutzi's [Cp*Si] + as effective source of Si(II) in a salt metathesis reaction also Chart 1 Borole substitution patterns under investigation.…”

Viability of half‐sandwich complex of heavier group‐14 elements (SiPb) with neutral Be3ring and its potential application asH2storage material

“…To check this, we have chosen heavier group-14 elements (Si Pb) for this study (Scheme 1).The reason for choosing heavier group-14 elements is the presence of documented evidence of them participating in sandwich type complex formation. In 2018, Tholen et al stabilized Ge (II) by incorporating it into borole dianion which resulted in the formation of a half sandwich complex [18]. Again, Guha et al carried out high level ab initio calculations to predict a number of half-sandwich complexes between borole dianion and group-14 elements [19].…”