The combined pentane phases are washed (2 x 2 M NaOH, 2 x H 2 0 ) and dried (MgSO,); pentane is removed in a rotary evaporator. The very pure (200 MHz, 'H-NMR) and almost colorless crude product (250 mg) contains more than 95% 2. Experiments on the 100 mmol scale (70 h) gave 2 in 95% conversion (GC: SE30, 80-160°C, 4"C/min) and ca. 80% yield upon distillation (m.p. =69-7O0C/16 torr).
5-10 mL Wasser wird 3-bis 4maI mit Pentan extrahiert. Die vereinigten Pentanphasen werden gewaschen (2 x 2 M NaOH, 2 x H20) und getrocknet (MgS04); Pentan wird im Rotavapor abgezogen. Das sehr reine (2OOMHz-'H-NMR) und nahezu farblose Rohprodukt (250 mg) enthhlt mehr als 95% 2. Versuche im 1OOmmol-MaOstab (70 h) ergaben 95% Umsatz (GC: SE30,80-16O0C, 4"C/min) und ca. 80% Ausbeute an destilliertem 2 (Kp=69-7O0C/16 Tom).
The sections in this article are
Introduction
Formation of Methylchlorosilanes
Reaction Mechanism
Copper Catalyst
Promoters and Inhibitors
Reactants and Raw Materials
Influence of Temperature and Pressure
Applications in the Silicones Industry
Industrial Process
Parameters and Process Control
Course of Production Runs
Byproduct Utilization and Waste Treatment
Outlook
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.