NMR data indicate that tetramethyl-N,N′-bis-o-chlorophenylcyclodisilazane possesses aryl groups which are coplanar with the cyclodisilazane ring. An X-ray crystal structure determination has corroborated this conformation in the solid state. The Si-N bond distance (1.756(2) Å) is the longest reported for N,N′-diarylcyclodisilazanes. Interactions between the halogen atom and d-orbitals of silicon and enhanced delocalization may contribute to the stability of the coplanar conformation. Repulsive non-bonded interactions in the coplanar conformation are presumably less prominent than in the o-tolyl derivative.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry