7418-20-4Relevant academic research and scientific papers
Reactivity of bis(2,2,5,5-tetramethyl-2,5-disila-1-azacyclopent-1-yl)tin with CO2, OCS, and CS2 and comparison to that of bis[bis(trimethylsilyl)amido]tin
Stewart, Constantine A.,Dickie, Diane A.,Parkes, Marie V.,Saria, Josephat A.,Kemp, Richard A.
experimental part, p. 11133 - 11141 (2011/02/16)
The heterocumulenes carbon dioxide (CO2), carbonyl sulfide (OCS), and carbon disulfide (CS2) were treated with bis(2,2,5,5-tetramethyl-2,5-disila-1-azacyclopent-1-yl)tin {[(CH 2)Me2Si]2N}2Sn, an analogue of the well-studied bis[bis(trimethylsilyl)amido]tin species [(Me3Si) 2N]2Sn, to yield an unexpectedly diverse product slate. Reaction of {[(CH2)Me2Si]2N}2Sn with CO2 resulted in the formation of 2,2,5,5-tetramethyl-2,5-disila-1- oxacyclopentane, along with Sn4(μ4-O){μ2- O2CN[SiMe2(CH2)2]} 4(μ2-N=C=O)2 as the primary organometallic Sn-containing product. The reaction of {[(CH2)Me2Si] 2N}2Sn with CS2 led to formal reduction of CS2 to [CS2]2-, yielding [{[(CH 2)Me2Si]2N}2Sn]2CS 2{[(CH2)Me2Si]2N}2Sn, in which the [CS2]2- is coordinated through C and S to two tin centers. The product [{[(CH2)Me2Si]2N} 2Sn]2CS2{[(CH2)Me 2Si]2N}2Sn also contains a novel 4-membered Sn-Sn-C-S ring, and exhibits a further bonding interaction through sulfur to a third Sn atom. Reaction of OCS with {[(CH2)Me2Si] 2N}2Sn resulted in an insoluble polymeric material. In a comparison reaction, [(Me3Si)2N]2Sn was treated with OCS to yield Sn4(μ4-O)(μ2- OSiMe3)5(n1-N=C=S). A combination of NMR and IR spectroscopy, mass spectrometry, and single crystal X-ray diffraction were used to characterize the products of each reaction. The oxygen atoms in the final products come from the facile cleavage of either CO2 or OCS, depending on the reacting carbon dichalogenide.
A novel [6]ferrocenophane containing a N-Si-C-C-Si-N bridge, in equilibrium by ring-opening with an 1,1′-diaminoferrocene derivative
Wrackmeyer, Bernd,Klimkina, Elena V.,Milius, Wolfgang
, p. 412 - 416 (2008/10/09)
The reaction of 1,1′-diaminoferrocene 1 with 1,2- bis(chlorodimethylsilyl)ethane in the presence of triethylamine leads to the ferrocene derivative 5 bearing in 1-position the amino group and in 1′-position an azadisilacyclopentyl ring. Complex 5 is shown to be in equilibrium with the 1,6,2,5-diazadisila-[6]ferrocenophane 6. Both complexes 5 and 6 were characterised by X-ray structural analysis, and in solution by 1H, 13C and 29Si NMR spectroscopy.
Synthesis and reactions of the cyclic silyl peroxide 1,1,4,4-tetramethyl-2,3-dioxa-1,4-disilacyclohexane
Adam, Waldemar,Albert, Rainer
, p. 8015 - 8016 (2007/10/02)
The first simple cyclic silyl peroxide, namely 1,1,4,4,-tetramethyl-1,4-disila-2,3-dioxane (1), was prepared by classical synthetic methodology from its corresponding cyclic disilazane and the urea complex of hydrogen peroxide.
The preparation, isomerization, and oxidation of silylhydrazines
Pitt, Colin G.,Skillern, Kenneth R.
, p. 865 - 870 (2007/10/10)
The reaction of 1,2-bis(dimethylchlorosilyl)ethane with hydrazine affords both 3,3,6,6-tetramethyl-1,2-diaza-3,6-disilacyclohexane (III) and 1-amino-2,2,5,5-tetramethyl-1-aza-2,5-disilacyclopentane (IV). It has been shown that III and IV are in equilibrium at room temperature in the absence of added catalysts. The thermal equilibration of 1,1- and 1,2-bis(trimethylsilyl)hydrazine has similarly been demonstrated. The oxidations of III and IV, and 1,1- and 1,2-bis(trimethylsilyl)hydrazine, with mercuric oxide and with ethyl azodicarboxylate have been investigated. The various oxidation products have been identified and their formation rationalized by invoking oxidation at both silicon and hydrogen.
