Synthesis and characterisation of cyclo-boratetrasiloxane, (RBO)(Me2SiO)3 (R=nBu,Ar), derivatives |
| |
| Affiliation: | 1. Department of Chemistry, University of Wales, Bangor, Gwynedd LL57 2UW, UK;2. Pilkington Building Products R and D, European Technical Centre, Lathom, Lancashire L40 5UF, UK;1. School of Economics and Management, Beijing University of Chemical Technology, Beijing, 100029, China;2. College of Information Science and Technology, Beijing University of Chemical Technology, Beijing, 100029, China;3. School of Economics and Management, North China Electric Power University, Beijing, 102206, China;4. Department of Management Sciences, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Kowloon, Hong Kong;1. Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology & Business University (BTBU), Beijing 100048, China;2. Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University (BTBU), Beijing 100048, China;3. Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University (BTBU), Beijing 100048, China;4. School of Food and Chemical Engineering, Beijing Technology & Business University (BTBU), Beijing 100048, China;1. N.S. Enikolopov Institute of Synthetic Polymeric Materials of Russian Academy of Sciences (ISPM RAS), 70 Profsoyuznaya st., Moscow, 117393, Russia;2. A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences (INEOS RAS), 28 Vavilova st., Moscow, 119334, Russia;3. Dow Inc., Midland, MI, 48686, USA;1. School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin, 541004, PR China;2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin, 541004, PR China |
| |
| Abstract: | 
Low temperature reactions of dilute solutions of 1,5-dichloro-1,1,3,3,5,5-hexamethyltrisiloxane with boronic acids {RB(OH)2; R=nBu, C6H4Me-2, C6H4Me-3, C6H4Me-4, C6H4OMe-3, C6H4OMe-4, C6H4Br-2, C6H4Br-3, C6H4Br-4} in the presence of a twofold excess of Et3N afforded the 8-membered ring products, cyclo-boratetrasiloxanes, (RBO)(Me2SiO)3, in moderate yields. New compounds were colourless oils and were characterised by elemental analysis, NMR (1H, 11B, 13C, 29Si), IR and MS. The cyclo-boratetrasiloxanes are weakly Lewis acidic, with acceptor number (AN) values of ∼30, but do not form adducts with amines. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
