1450898-99-3Relevant academic research and scientific papers
Organometallic tin compounds derived from 2-benzimidazole propionic acid
Camacho-Camacho, Carlos,Esparza-Ruiz, Adriana,Pena-Hueso, Adrian,Mijangos, Edgar,Ramos-Garcia, Iris,Contreras, Rosalinda,Flores-Parra, Angelina
, p. 1122 - 1128 (2013)
Reactions of 2-benzimidazole propionic acid (1) with [Sn(nBu) 3]2O and SnPh3OH gave mononuclear organometallic tin esters 2 and 3, respectively, where 1 is coordinated to the tin atom through the carboxylate group. Further reactions of 2 with DMSO and 3 with methanol, ethanol, pyridine, DMSO, THF and water afforded the corresponding tin compounds coordinated by the base 4-10, respectively. X-ray diffraction analyses of 5, 6 and 10 were obtained. The solid-state structures showed that the ligand 1 is bound through both oxygen atoms of the carboxylic group with the Lewis base anti to it. Reaction of 1 with di-n-butyltin oxide produced a tetranuclear distannoxane (11) by the association of four Sn(nBu)2 groups, two oxygen atoms and four ligands. Four of the oxygen atoms are tricoordinate. The tin atoms are hexacoordinate with distorted octahedral geometries. The macromolecule has in total seven fused rings. Five of them are four membered rings arranged in a ladder-type arrangement and the other two are six membered rings. The aliphatic chains and the benzimidazole groups are perpendicularly oriented to the polycyclic arrangement giving a sandwich with polar bonds in the middle and covered by the aliphatic and aromatic groups. In all compounds the ligands showed a chiral helicoidal preferred conformation. Copyright
