The crystal structure of tetramethyl-N,N' -diphenylcyclodisilazane is reported. The molecule has a centre of symmetry and the phenyl groups are almost coplanar with the cyclodisilazane ring. SiN bond distances are 1.739(3) and 1.749(3) Å, the mean SiC bond length is 1.849 and the CN bond length is 1.382(4) Å, while the NSiN and SiNSi bond angles are 85.7(1) and 94.3(1)°, respectively. Considerable bathochromic shifts are found in the UV spectra of the compound compared with that of N-phenyl(hexamethyl)disilazane. Structural and spectroscopic data show enhanced delocalization. The π-bond orders calculated by the PPP method are p(CN) 0.325 and p(SiN) 0.346.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry
- Materials Chemistry