Anion-𝜋 interactions in layered structures of salts of 5-(hydroxyimino) quinolin-8-one and related salts

Journal of Chemical Sciences

Jubaraj B Baruah1¹  Prithiviraj Khakhlary¹ 

[1] Department of Chemistry, Indian Institute of Technology Guwahati, North Guwahati 781 039, Assam, India$$

关键词: Layered structures;    anion-𝜋 interactions;    quinoline salts;    crystal structures;    optical properties;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

Relevance of anion-𝜋 interactions in chloride, bromide, nitrate and perchlorate salts of 5-(hydroxyimino)quinolin-8-one are discussed. Structures of nitrate salt of 5-aminoquinoline as well as nitrate salt of 4-hydroxyquinazoline are compared with the structure of nitrate salt of 5-(hydroxyimino)quinolin-8-one. From such a comparison, two different arrangements of nitrate ions with respect to the respective cations are discerned. Nitrate ions are sandwiched between aromatic planes of cations in nitrate salts of 5-(hydroxyimino)quinolin-8-one or 4-hydroxyquinazoline; whereas, nitrate ions are in oblique positions with respect to aromatic planes of counter cations in nitrate salt of 5-aminoquinoline. Binding constants of different nitrate salts in solution are determined by UV-visible spectroscopic titrations. Solution study shows formation of ion-pairs of these salts in solution.

【 授权许可】

Unknown