Synthesis of Potassium Oligosilanides in Benzene

Zitz, Rainer; Baumgartner, Judith; Marschner, Christoph

doi:10.1002/ejic.201800099

Cited by 4 publications

(3 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even upon removal off the solvent the silanides do not undergo detectable degradation reactions. Moreover, according to NMR spectroscopy and X‐ray crystallography 5 a – d can be isolated completely solvent free, which is for many follow up reactions (strong Lewis acids, for example, result in ether cleavage) highly beneficial [26] . All four silanides are easily soluble in THF, but nearly insoluble in Et 2 O or other more unpolar solvents, such as toluene and n ‐pentane.…”

Section: Methodsmentioning

confidence: 99%

Dodecamethoxyneopentasilane as a New Building Block for Defined Silicon Frameworks

et al. 2021

View full text Add to dashboard Cite

In this contribution, a convenient synthetic method to obtain tris(trimethoxysilyl)silanides (M=Li, Na, K, Cu) 5 a–d is described. 5 a–d are easily accessible deriving from dodecamethoxyneopantasilane 4 in excellent yields and could be fully characterized via NMR spectroscopy and X‐ray crystallography. The efficiency of 5 a–d to serve as a new building block in silicon chemistry is demonstrated by the reactions with two different types of electrophiles (carbon‐ and silicon‐electrophiles). In all cases the salt metathesis reaction gave rise to novel polysilanes in excellent yields. The possibility of a post‐functionalization to perhydropolysilanes as well as perchloropolysilanes enables the synthesis of new precursors for silicon deposition.

show abstract

Section: Methodsmentioning

confidence: 99%

Dodecamethoxyneopentasilane as a New Building Block for Defined Silicon Frameworks

et al. 2021

View full text Add to dashboard Cite

show abstract

“…This is similar to the aforementioned silanolates. Complexes obtained in this way involve the cations Li + , [82–86] Na + , [87–89] K + , [85,87,89–91] Rb + , [89] Cs + , [87,89,92] Mg 2+ , [93] Sr 2+ , [94] Ba 2+ , [95,96] Sn 4+ , [97,98] Cr 2+/3+ , [99,100] Fe 3+ , [101] Y 3+ , [100,102] Zr 4+ , [103] Sm 2+ , [104] Tm 3+ , [105] Yb 2+ , [104,106–108] Th 4+ , [109–112] U 4+ , [109–113] and UO 2 2+ [114] . Hence, many siloxane⋅⋅⋅M n+ contacts might have been established over the years but are rather occasionally than purposefully realized.…”

Section: Siloxane Coordination Compoundsmentioning

confidence: 99%

Siloxane Coordination Revisited: Si−O Bond Character, Reactivity and Magnificent Molecular Shapes

Dankert

Hänisch

2021

Eur J Inorg Chem

View full text Add to dashboard Cite

Siloxanes have evolved into a multi‐million dollar business due to their manifold of commercial and industrial applications. As siloxanes have high hydrophobicity, low basicity, high flexibility and also high chemical inertness in common, their chemistry differs significantly from that of organic ethers. The discovery of organic crown ethers, for instance, is commonly accepted as the birth of synthetic host‐guest chemistry. Regarding the chemical properties of siloxanes, cyclic siloxanes which formally resemble silicon analogues of crown ethers, have received considerably less interest in terms of their host‐guest chemistry. Hence, only little is known about siloxane coordination chemistry in the chemical community and the number of published works in this field has been very low till lately. In the last few years, the field has significantly advanced and elegant methods were established to enable the Si−O−Si unit for coordination. This review therefore summarizes the recent developments in the field, recapitulates the historical aspects of siloxane coordination chemistry and describes the specific Si−O bond character with regard to different siloxane linkages. Implications on Si−O bond activation are included and the limits of siloxane coordination are redefined.

show abstract

“…We hypothesize that the toluene to benzene solvent replacement increased yield by avoiding silanide protonation. 16 By using the 4-membered disilanide D2 , the sila-cyclooctyne Si-COy could also be obtained in 97% crude yield.…”

mentioning

confidence: 99%