Synthesis, crystal structure and properties of silicon(IV) complexes with N-aryl substituted α-diimine ligands

Two silicon(IV) compounds with α-diimine ligands, L(SiMe₃)₂(2) (L=[(2, 6-ⁱPr₆Η₃)NC(Μe)]₂), L′(SiMe₃)₂ (4) (L′=[(2, 6-ⁱPr₂C₆H₃)NCH]₂) were synthesized by the reaction of corresponding sodium salts or lithium salts with chloro (trimethyl)silane. The crystal of compound 2 belongs to the monoclinic system, space group P2₁/n with a=0.958 5(3) nm, b = 1.811 8(5) nm, c=0.982 4(3) nm, β=102.173(3), V=1.667 7(8) nm³, Z=2. The crystal of compound 4 belongs to the triclinic system, space group P1 with a=0.883 7 (2) nm, b=0.967 5 (2) nm, c = 1.142 9 (4) nm, β=88.94 (2), V=0.835 8(4) nm³, Z=1. A zig-zag arrangement of the atoms N(1), C(13), C(13ⁱ) and N(1ⁱ) is the core of both of the two molecular structures. Both of the two complexes were characterized by single crystal X-ray structural analysis, ¹H NMR, elemental analysis, and FTIR spectra, analyzed by UV-Vis spectrum and fluorescent spectra properties. The compounds exhibit strong fluorescence under ultraviolet light. CCDC: 896958, 2; 896957, 4.