Molecular structure of1 b. The anisotropic displacement parameters are depicted at the 50 % probability level. Hydrogen atoms, except NH−, have been omitted for clarity. Selected bond lengths (Å) and bond angles (°). N1−Si1 1.7935(10), N2−Si1 1.9024(10), N3−Si1 1.8781(10), C1−N1 1.4095(13), N1−Si1−N2 102.65(4), N1−Si1−N3 95.11(5).
