Cyclotetrasilazane als precursor für cyclotrisilazane und bis(cyclodisilazan-1-yl)silane
                                
                                    
                                        作者:Elisabeth Werner、Uwe Klingebiel                                    
                                    
                                        DOI:10.1016/0022-328x(94)80146-0
                                    
                                    
                                        日期:1994.5
                                    
                                    Di-lithiated octamethylcyclotetrasilazane (OMCTS, 1) reacts with halosilanes in different ways. Ring contraction with formation of the isomeric cyclodisilazanes 2, 3 occurs in the reaction with chloro- and fluorotrimethylsilanes. Substitution (6) and ring contraction with formation of the isomeric six-membered ring 7 occurs with chlorodimethylsilane. 2, 3, 6 and 7 are excellent precursors of silyl-bridged, SiH-functional, four-membered ring systems (4, 5, 9-11). The mechanism of the isomerization reactions are discussed.