Synthesis of Metal Complexes Having Fluorine-Containing Phosphine Ligands

✍ Scribed by Prof. Dr. Th. Kruck; Dr. M. Höfler; Dipl.-Chem. H. Jung; H. Blume

• Publisher: John Wiley and Sons
• Year: 1969
• Tongue: English
• Weight: 224 KB
• Volume: 8
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.196905221

✦ Synopsis

cyclosilazane structures are assumed. We have now observed that partial isomerizations takeplace in thesereactions which depend strongly on the reaction conditions. The monosilylation of hexamethylcyclotrisilazane with butyllithium/trimethylchlorosilane in diglyme at temperatures between -60 and 1 6 0 "C affords 2,2,4,4,6,6-hexamethyl-l-tri--~ methylsilylcyclotrisilazane ( I ) . Formation of (2). the isomer of ( I ) , which melts at 36 "C and which can be prepared by ammonolysis of 2,2,4,4-tetramethyl-l-dimethylchlorosilyl-3trimethylsilylcyclodisilazane, was not observed. Whereas the doubly silylated hexamethylcyclotrisilazane (3) is obtained when hexamethylcyclotrisilazane is silylated in diglyme at on the side of (3). Thus, 78 % of the isomer (5) and only 11 % of compound ( 6 ) are obtained by metalation, at -6OoC, and subsequent silylation of ( 4 ) .