Two 2D metal–organic frameworks based on 2,2′-bibenzimidazole ligand with (6,3) net topology

Two-Dimensional Metal-Organic Framework Materials: Synthesis, Structures, Properties and Applications

“…Similarly, in a heterometallic complex [Ni­(L)­Sm­(1,4-bdc) 1.5 ]·CH 3 OH (H 2 L = salamo-like bisoxime), a chair-shaped trans -decalin type hexagonal 2D sheet is featured, which is constructed from [Ni­(L)­Sm] units with distorted octahedral Ni 2+ and distorted tricapped trigonal prism Sm 3+ metal centers, which are linked via exodentate bdc 2– linkers . Many other examples on honeycomb-based hexagonal grids are reported in the literature. ,,,,,,,,− …”

5,5′,6,6′‐Tetranitro‐2,2′‐bibenzimidazole: A Thermally Stable and Insensitive Energetic Compound

“…The construction of the TNBBI molecule is relativelyc omplicated, but the compound has an axis of symmetry and the final spectrum is not complicated. The mostimportant characteristic identified TNBBI skeleton vibrations are:3 149 (C Ar ÀH),2 942 (NÀH), 3074( C Ar ÀH), 1603 (C Ar =C Ar ), 1539 (N=O( -NO 2 )), 1440 (CÀN), 1358 (N=O [13] C 17 H 7 N 11 O 16 À55.4 360.0 10 > 360 TATB [14] C 6 [14,15] C 12 (-NO 2 )), 1144 (NÀH), 1050 (C Ar ÀH), 864 (C Ar ÀNO 2 ), 3169 (NÀH), and 1505cm À1 (N=O).Afull list of IR spectrum peaks is presented in the Experimental Section.…”

“…BBI is formally as ubstituted diaminobenzene, so in four positions of the benzene ring it can undergo typicala romatic substitution reactions such as electrophilic( S E Ar) and nucleophilic (S N Ar) substitutions. Amino protons in imidazole rings are relatively reactive, so BBI in these positions can form salts and complexes with inorganic cations [6] and can be alkylated. [7] The classical nitration of aromatic compounds involvesa n electrophilic substitution.…”