First cyclotrisiloxanes with three different R2Si-units of the general formula R21Si(OSiR22)(OSiR23)O (R21 = Me2Si(NSiMe3)2, R2 = Cl, Ot-Bu, R3 = Me)

Rammo, Andreas

doi:10.1016/j.jorganchem.2011.01.016

Cited by 3 publications

(1 citation statement)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Like the parent acid and in spite of the steric protection, I and II are thermally unstable with respect to self‐condensation, which somewhat hampers their use for synthetic applications. Nonetheless, a number of discrete siloxanes [3,4] and metallasiloxanes [5–8] derived from I have been reported. This includes, for instance, Mo 2 [O 2 Si(O t ‐Bu 2 ) 2 ] 3 , which has been used as single‐source precursor for the preparation of the atomically well mixed binary element oxide Mo 2 Si 3 O 10 that is not accessible by the conventional sol‐gel process [5] …”

Section: Methodsmentioning

confidence: 99%

Perfluorinated Dialkoxysilanediols Resisting Self‐Condensation

et al. 2021

View full text Add to dashboard Cite

The reaction of sodium salts of perfluorinated tertiary alcohols R3COH with SiCl4 provided the di‐substituted dichlorosilanes (R3CO)2SiCl2 (1 a, R=CF3; 1 b, R=C6F5), the hydrolysis of which produced the corresponding silanediols (R3CO)2Si(OH)2 (2 a, R=CF3; 2 b, R=C6F5). Unlike most other dialkoxysilanediols known in the literature, 2 a and 2 b are stable towards self‐condensation at ambient conditions. In a similar way, the related disiloxanes [(R3CO)2SiCl]2O (3 a, R=CF3) and [(R3CO)2Si(OH)]2O (4 a, R=CF3) were prepared.

show abstract

Section: Methodsmentioning

confidence: 99%

Perfluorinated Dialkoxysilanediols Resisting Self‐Condensation

et al. 2021

View full text Add to dashboard Cite

show abstract

Molecular Structures of a 1,5‐Diselena‐2,4‐disila‐3‐oxa‐cycloheptane Derivative and a Diselane. Behavior of the Mixture Containing 1,2‐Dilithio‐ and 1,2‐Bis(lithioseleno)‐1,2‐dicarba‐closo‐dodecaborane(12)

Wrackmeyer

Klimkina

Milius

2011

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

Attempts to prepare a reagent containing the 1-lithioseleno-2-lithio-1,2-dicarba-closo-dodecaborane(12) were only partially successful. The non-cyclic 1-trimethysilylseleno-2-trimethysilyl-1,2-dicarba-closo-dodecaborane(12) could be obtained in mixtures, and a corresponding diselane, formed by hydrolysis/oxidation could be isolated and characterized by X-ray structural analysis. However, the synthesis of related heterocycles failed. Instead, cyclic species derived in * Prof. Dr. B: Wrackmeyer 1895 principle from 1,2-dilithio-and the 1,2-bis(lithioseleno)-1,2-dicarbacloso-dodecaborane(12) were isolated and characterized. This led to a new 1,5-diselena-2,4-disila-3-oxa-cycloheptane derivative, for which the structure in solution was confirmed by NMR spectroscopy ( 1 H, 13 C, 29 Si, 77 Se NMR) and DFT calculations [B3LYP/6-311+G(d,p)], and the molecular solid-state structure was determined by X-ray diffraction. Scheme 1. Straightforward route from ortho-carborane 1 via the 1,2dilithio derivative 2 to the 1,2-diselenolato-1,2-dicarba-closo-dodecaborane(12) dianion [1,2-(1,2-C 2 B 10 H 10 )Se 2 ] 2-(3). The potential route to the mono-insertion product "4" is shown.

show abstract