Complexation of trimeric copper(i) and silver(i) 3,5-bis(trifluoromethyl)pyrazolates with amine-borane

• Published in: Russian chemical bulletin Vol. 62; no. 8; pp. 1829 - 1834
• Main Authors: Titov, A. A., Guseva, E. A., Smol’yakov, A. F., Dolgushin, F. M., Filippov, O. A., Golub, I. E., Krylova, A. I., Babakhina, G. M., Epstein, L. M., Shubina, E. S.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.08.2013
• Subjects: Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Full Articles; Inorganic Chemistry; Organic Chemistry; boron hydrides; copper and silver macrocyclic pyrazolates; amine-boranes; IR spectroscopy; X-ray diffraction analysis; complexes
• ISSN: 1066-5285; 1573-9171
• DOI: 10.1007/s11172-013-0263-2

A complexation of trimeric copper( i ) and silver( i ) 3,5-bis(trifluoromethyl)pyrazolates ((ML) 3 ) with BH 3 NEt 3 was studied by IR spectroscopy in hexane and dichloromethane solutions. In hexane, two complexes [(ML) 3 ][BH 3 NEt 3 ] 2 ( 1 ) and [(ML) 3 ][BH 3 NEt 3 ] ( 2 ) were formed depending on the ratio of reagents. In dichloromethane, only one complex [(ML) 3 ][BH 3 NEt 3 ] ( 2 ) was found. The thermodynamic parameters (Δ H ○ , Δ S ○ ) of complex 1 in hexane and complex 2 in dichloromethane were obtained. The complex [(AgL) 3 ][BH 3 NEt 3 ] was isolated in the solid state, its structure was established by X-ray diffraction. The complex is formed due to two bridges B-H-Ag, one BH group is not involved in the complexation. In crystal, molecules 2 form supramolecular dimers due to the intermolecular interactions between metals of two macrocycles.