67133-55-5Relevant academic research and scientific papers
MANUFACTURING METHOD OF BOROSILOXANE
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Paragraph 0020; 0021; 0022, (2018/11/22)
PROBLEM TO BE SOLVED: To provide an industrially advantageous manufacturing method of borosiloxane, which is important as an electrolyte additive of a lithium ion battery or the like. SOLUTION: There is provided a boron compound having Lewis acid with index acceptor number of the Lewis acid of 60 to 110. There is provided a manufacturing method of borosiloxane represented by R5nB(OSiR1R2R3)3-n or the like by reacting hydrosilane represented by R1R2R3SiH or R1R2R4SiOSiR1R2H and a boronic acid derivative represented by R5nB(OR6)3-n or the like in the presence of a catalyst such as Tris (pentafluorophenyl) borane. R1 to R3 and R5 are each independently C1 to 12 alkyl or C6 to 12 aryl, R4 and R6 are each independently C1 to 12 alkyl, C6 to 12 aryl or H, and n is an integer of 0 to 2. SELECTED DRAWING: None COPYRIGHT: (C)2019,JPO&INPIT
Method for preparing hybrid cyclo-boron siloxane
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Paragraph 0032; 0033; 0034; 0035; 0036; 0037; 0038, (2016/10/10)
The invention relates to the field of chemistry and chemical engineering, provides a cheap and efficient cyclo-boron siloxane intermediate in order to prepare high-performance boracic polysiloxane, and particularly provides a method for preparing hybrid cyclo-boron siloxane. Under inert gas shielding, a mixture of alkyl boric acid and an organic solvent A is dropwise added to dialkyl dichloro-slane, stirring and reacting are carried out for 3 h to 8 h at the temperature of -20 DEG C to 80 DEG C, then the mixture is added into a mixture of an organic solvent B and metallic oxide, filtering and washing are carried out after reacting is carried out for 6 h to 18 h, the organic solvent A and the organic solvent B are evaporated out, and hybrid cyclo-boron siloxane is obtained. The method has the advantages that the raw materials can be obtained easily, and cost is low, and the compound can be used for synthesizing boron-silicon rubber, a heat-resisting adhesive, a heat-resisting coating and other boracic polysiloxane products, and can be widely applied to aerospace, electronics, chemical engineering, machinery and other industries.
Cyclo-Boratrisiloxane and cyclo-diboratetrasiloxane derivatives and their reactions with amines: Crystal and molecular structure of (p-BrC6H4BO)2(Ph2SiO)2
Beckett, Michael A.,Hibbs, David E.,Hursthouse, Michael B.,Malik, K.M. Abdul,Owen, Paul,Varma, K. Sukumar
, p. 241 - 247 (2007/10/03)
The new cyclo-diboratetrasiloxanes (RBO)2(R′2SiO)2 (R=p-BrC6H4, o-MeC6H4, m-NH2C6H4, m-NO2C6H4, Bun;
Synthesis, properties, and ring-ring transformation reactions of cyclic siloxanes incorporating skeletal boron atoms: X-ray crystal structures of the strained boracyclotrisiloxane (PhBO)(Ph2SiO)2 and the boracyclotetrasiloxane (PhBO)(Ph2SiO)3
Foucher, Daniel A.,Lough, Alan J.,Manners, Ian
, p. 3034 - 3043 (2008/10/08)
The cyclic boratrisiloxanes (PhBO)(RR′SiO)2 (1, R = R′ = Me; 2, R = Me, R′ = Ph; 3, R = R′ = Ph) have been prepared via the reaction of the dichlorodisiloxanes 1,3-ClRR′SiOSiRR′Cl with phenylboric acid in the presence of NEt3 as an HCl acceptor. Similar procedures using the appropriate α,ω-dichlorosiloxanes ClMe2Si(OSiMe2)nOSiMe2Cl (n = 1 or 2) afforded the boracyclotetrasiloxane (PhBO)(Me2SiO)3 (4) and the boracyclopentasiloxane (PhBO)(Me2SiO)4 (5). The boracyclotetrasiloxane (PhBO)(Ph2SiO)3 (8) was isolated in low yield from the reaction of 2:1 excess of 1,3-ClPh2SiOSiPh2Cl with PhB(OH)2 in the presence of NEt3. The cyclic borasiloxanes 1 and 3 undergo extensive ring-ring transformation reactions when heated at elevated temperatures in the presence of small quantities of K[OSiMe3]. Similar reactions were detected in solution in the presence of acid or base catalysts. The products of these reactions mainly consist of larger rings containing a single boron atom, together with cyclic and polymeric siloxanes and the boroxin [PhBO]3. Similar, but slower, ring-ring redistribution reactions were detected for the boracyclotetrasiloxane 4. These results are consistent with the presence of additional strain in borasiloxanes containing a six-membered ring. This analysis was supported by a comparison of X-ray structural data obtained for 3 with that for 8. Thus, the boracyclotrisiloxane 3 was found to possess a highly strained six-membered ring with considerable bond angle distortion whereas the nonplanar eight-membered ring present in 8 is appreciably less strained. Crystals of 3 are monoclinic, space group C2/c, with a = 15.703 (6) A?, b = 10.864 (3) A?, c = 17.733 (4) A?, β = 119.14 (2)°, V = 2641 (14) A?3, and Z = 4. Crystals of 8 are monoclinic, space group P21/n, with a = 14.692 (2) A?, b = 13.707 (2) A?, c = 19.932 (3) A?, β = 111.38 (0)°, V = 3737.7 (9) A?3, and Z = 4.
