Conformation driven complexation of two analogous benzimidazole based tripodal ligands with Ag(I) resulting in a trigonal prism and a coordination polymer

Journal of Chemical Sciences

Binoy K Saha1¹  Suman Bhattacharya¹ 

[1] Department of Chemistry, Pondicherry University, Pondicherry 605 014, India$$

关键词: Silver(I);    coordination polymer;    metallocycle;    tripodal ligands;    inclusion complexes.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

Two analogous tripodal ligands, namely, 1,3,5-tris(benzimidazol-1-ylmethyl)-2,4,6-triethylbenzene (1-Et) and 1,3,5-tris(benzimidazol-1-ylmethyl)-2,4,6-trimethoxybenzene (1-OMe) have been used for complexation with silver(I) tetrafluoroborate. A trinuclear Ag(I) salt, formulated as $mathbf{[Ag_3(1-Et)_2]^{3+}(BF_4){}^{−}_{3}ullet 7CH_3CNullet yH_2O}$ was formed in the complexation reaction of 1-Et with silver(I) tetrafluoroborate, which consists of a trigonal prismatic cation formed by three bicoordinated Ag(I) coordinated with two 1-Et ligands. In case of the 1-OMe ligand, however, a one dimensional ladder, formulated as $mathbf{[(Ag(1-OMe)OH_2)^{+}(BF_4)^{−}ullet MeOH]_{infty}}$ was obtained which is constituted of a tetracoordinated Ag(I) center in a distorted tetrahedral environment. The crystal structures of the ligand hydrates namely $mathbf{1-Etullet H_2O}$ and $mathbf{1-OMeullet 3.6H_2O}$ have been discussed along with the structure of methanol solvate-hydrate of 1-Et. The imidazole rings of the Bim groups in 1-Et in the crystal structures of the ligand as well as in its coordination complex with the Ag(I) are pointed inward with respect to the central ring, whereas it is pointed outwards in the crystal structures of 1-OMe as well as its Ag(I) complex.

【 授权许可】

Unknown