Journal of Organometallic Chemistry p. 16 - 23 (2003)
Update date:2022-08-03
Topics:
Kliem, Susanne
Klingebiel, Uwe
Schmatz, Stefan
Lithium amino-di- tert -butysilanolate reacts with halosilanes to give 1-silylamino-1,3-siloxanes (1-4). The tetrakis(1-silylamino)siloxane 4 thermally condenses yielding a spiocyclic six-membered ring (5) and NH3. Lithium salts of animo-disiloxanes form silylamino-silanolates or amido-disiloxanes. The first includes a 1,3-silyl group migration from the oxygen to the nitrogen atonm. The energies of the isomeric lithium salts of model compunds are calculated. Exemplary crystal structures are presented.(SiOSiN)-four- or eight-membered rings (6,7) are thermally obtaines by LiF-elimination from fluoro containing salts. In further reactions of lithiated animo-disiloxanes with halosilanes isomeric 1-silylamino-1,3-disiloxanes can be obtaines (15,16). The 1,3-silyl group migration can sterically (9) or electronically (10-14) be prevented.The most stable lithium salts of 1-silylamino-1,3-disiloxanesform amides. This explains that in further reactions with halosilanes, the new ligand is bonded wo the nitrogen atom (23-25). In results of crystal structure determinations new lithium-1-fluorosilylamio-1,3-disiloxanes (19-21) are presented. 19 crystallizes as tricyclic, 20 as an unknown pentacyclic, and 21 as monomeric compound. In 21, the shortest Si-N bond length (157.9 pm) with four coordinate silicon is found.
View MoreShanghai He Yang International Trading Co., Ltd.
Contact:+86-21-52043598
Address:Room 816, Blag.5, No.58 Huachi Road
Nanjing HuiBaiShi Biotechnology Co.,Ltd.
Contact:+86 (25)58745219
Address:No.606 Ningliu Road,LiuHe District.
Anhui Sunsing Chemicals Co.,Ltd
website:http://www.sunsingchem.com
Contact:0086-566-2023179
Address:Jin An industry park, Chizhou economic technical development zone, Anhui
Hangzhou Kai Peng Biotechnology Co., Ltd.
Contact:86-571-89939007
Address:NO. 499, Wensan West Road, Xihu District, Hangzhou, 310012, China
Shenzhen JYMed Technology Co.,Ltd.
website:http://www.jymedtech.com
Contact:+86-755-26612112
Address:1#8,9/F, Biomedicine innovation Industrial Park, No.14, Jinhui Road, Pingshan Sistrict, Shenzhen, China
Doi:10.1055/s-2006-948195
(2006)Doi:10.1021/ol050224s
(2005)Doi:10.1021/jo00157a028
(1983)Doi:10.1021/ol050203y
(2005)Doi:10.1021/ja00347a055
(1983)Doi:10.1080/10587250108025061
(2001)