Crystalline products of CO2 capture by piperazine aqueous solutions. Issue 33 (18th July 2016)

• Record Type: Journal Article
• Authors: Fonari, Marina S.; Antal, Sofia; Castañeda, Raúl; Ordonez, Carlos; Timofeeva, Tatiana V.
• Is Part Of: CrystEngComm. Volume 18:Issue 33(2016)
• Page Start: 6282
• Page End: 6289
• Publication Date: 2016-07-18
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c6ce01083k
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Crystalline products of the reactions of piperazine (PZ) solutions with CO2 sourced from the air and dry ice represent three carboxamides of piperazine, (PZH + CO2 − )·3H2 O, (PZH + )(PZCO2 − ), and (PZH + )2 (PZ(CO2 − )2 )·3H2 O, whose crystal structures were revealed by single crystal X-ray diffraction studies. Abstract : Crystalline products of the reactions of piperazine (PZ) solutions with CO2 sourced from the air and dry ice represent three carboxamides of piperazine, piperazinium carboxamide trihydrate (PZH + CO2 − )·3H2 O, piperazinium piperazine-4-carboxamide (PZH + )(PZCO2 − ), and bis-(piperazinium) piperazine-1, 4-bis(carboxamide) trihydrate (PZH + )2 (PZ(CO2 − )2 )·3H2 O, whose crystal structures were revealed by single crystal X-ray diffraction studies. The interplay of hydrogen bonding affords the crystal stability of these hydrolytically labile piperazine carbamate derivatives which have not been observed in the solid state before. The crystal structure of piperazine monohydrate PZ·H2 O is reported as well.