Dichlorodimethylsilane → 5,5,9,9-Tetrabutyl-7,7-dimethyl-6,8-dioxa-7-sila-5,9-distannatridecane
Reaction equation
C([Sn](CCCC)(CCCC)[O:6][Sn:7]([CH2:16][CH2:17][CH2:18][CH3:19])([CH2:12][CH2:13][CH2:14][CH3:15])[CH2:8][CH2:9][CH2:10][CH3:11])CCC.Cl[Si:29](Cl)([CH3:31])[CH3:30]>>[CH2:16]([Sn:7]([CH2:12][CH2:13][CH2:14][CH3:15])([CH2:8][CH2:9][CH2:10][CH3:11])[O:6][Si:29]([O:6][Sn:7]([CH2:8][CH2:9][CH2:10][CH3:11])([CH2:12][CH2:13][CH2:14][CH3:15])[CH2:16][CH2:17][CH2:18][CH3:19])([CH3:31])[CH3:30])[CH2:17][CH2:18][CH3:19]Participants
3
Conditions
- Temperature
- 180 °C
Procedure
Hexabutyldistannoxane (2 equiv.) was slowly added dropwise with stirring to dimethyldichlorosilane (19), followed by heating to 180° C. for 4 hours and vacuum distillation to give bis(tri-n-butylstannyloxy)dimethylsilane 24. Equimolar amounts of 23 and 24 in THF were stirred at room temperature for 4 hours before cyclosiloxane 25 was isolated by distillation.