Isolation and structural characterization of the elusive 1 : 1 adduct of hydrazine and carbon dioxide

Abstract

A solid hydrazine was isolated as a crystalline powder by reacting aqueous hydrazine with supercritical CO(2). Its structure determined by single crystal X-ray diffraction shows a zwitterionic form of NH(3)(+)NHCO(2)(-). The solid hydrazine is remarkably stable but is as reactive as liquid hydrazine even in the absence of solvents.

Synthesis of Azines in Solid State: Reactivity of Solid Hydrazine with Aldehydes and Ketones

“…The bond distances and angles of the two molecules are slightly different owing to their subtle differences in the geometric parameters, which are given in the Supporting Information. The N–N bond length (1.398 Å) of 3a is shorter than that of 1 (1.438 Å) but is similar to that of other azine compounds. ,,, Notably, the CC and CN bonds in the π-conjugated bridge (CCCNNCCC) were virtually identical to those in other organic molecules . Alternatively, the C–C bond (1.336 Å) in the π-conjugated bridge was much shorter than a typical C–C single bond (1.54 Å), as found in the conjugated system.…”

Synthesis of Azines in Solid State: Reactivity of Solid Hydrazine with Aldehydes and Ketones

“…The bond distances and angles of the two molecules are slightly different owing to their subtle differences in the geometric parameters, which are given in the Supporting Information. The N–N bond length (1.398 Å) of 3a is shorter than that of 1 (1.438 Å) but is similar to that of other azine compounds. ,,, Notably, the CC and CN bonds in the π-conjugated bridge (CCCNNCCC) were virtually identical to those in other organic molecules . Alternatively, the C–C bond (1.336 Å) in the π-conjugated bridge was much shorter than a typical C–C single bond (1.54 Å), as found in the conjugated system.…”

Aqueous hydrazine as a promising candidate for capturing carbon dioxide

“…The absorption data as a function of time suggests that the hydrazine solution absorbs CO 2 faster than the MEA solution. The absorption of CO 2 by hydrazine leads eventually to the formation of white precipitates, and the precipitates start to form long after the complete absorption of CO 2 (Lee et al, 2011). The insets of Fig.…”

Flexible n-type thermoelectric composite films with enhanced performance through interface engineering and post-treatment

“…The thermal decomposition behavior of residue organics and adsorbed hydrazine (see figure S5, supplementary materials), was derived from thermal gravimetric analysis (TGA) measurements. The removal of the organic residue and adsorbed hydrazine molecules was attributed to nominal weight loss [63,64], as featured in the TGA curve from T = 70 °C to approximately T = 110 °C. During removal of organic molecules, the electrical resistivity started to decrease abruptly from 75 °C (see figure S6, supplementary materials).…”

Synthesis of Azines in Solid State: Reactivity of Solid Hydrazine with Aldehydes and Ketones

“…The bond distances and angles of the two molecules are slightly different owing to their subtle differences in the geometric parameters, which are given in the Supporting Information. The N–N bond length (1.398 Å) of 3a is shorter than that of 1 (1.438 Å) but is similar to that of other azine compounds. ,,, Notably, the CC and CN bonds in the π-conjugated bridge (CCCNNCCC) were virtually identical to those in other organic molecules . Alternatively, the C–C bond (1.336 Å) in the π-conjugated bridge was much shorter than a typical C–C single bond (1.54 Å), as found in the conjugated system.…”

Aqueous hydrazine as a promising candidate for capturing carbon dioxide

“…The absorption data as a function of time suggests that the hydrazine solution absorbs CO 2 faster than the MEA solution. The absorption of CO 2 by hydrazine leads eventually to the formation of white precipitates, and the precipitates start to form long after the complete absorption of CO 2 (Lee et al, 2011). The insets of Fig.…”

Flexible n-type thermoelectric composite films with enhanced performance through interface engineering and post-treatment

“…The thermal decomposition behavior of residue organics and adsorbed hydrazine (see figure S5, supplementary materials), was derived from thermal gravimetric analysis (TGA) measurements. The removal of the organic residue and adsorbed hydrazine molecules was attributed to nominal weight loss [63,64], as featured in the TGA curve from T = 70 °C to approximately T = 110 °C. During removal of organic molecules, the electrical resistivity started to decrease abruptly from 75 °C (see figure S6, supplementary materials).…”

Synthesis of Azines in Solid State: Reactivity of Solid Hydrazine with Aldehydes and Ketones

“…The bond distances and angles of the two molecules are slightly different owing to their subtle differences in the geometric parameters, which are given in the Supporting Information. The N–N bond length (1.398 Å) of 3a is shorter than that of 1 (1.438 Å) but is similar to that of other azine compounds. ,,, Notably, the CC and CN bonds in the π-conjugated bridge (CCCNNCCC) were virtually identical to those in other organic molecules . Alternatively, the C–C bond (1.336 Å) in the π-conjugated bridge was much shorter than a typical C–C single bond (1.54 Å), as found in the conjugated system.…”

Aqueous hydrazine as a promising candidate for capturing carbon dioxide

“…The absorption data as a function of time suggests that the hydrazine solution absorbs CO 2 faster than the MEA solution. The absorption of CO 2 by hydrazine leads eventually to the formation of white precipitates, and the precipitates start to form long after the complete absorption of CO 2 (Lee et al, 2011). The insets of Fig.…”

Flexible n-type thermoelectric composite films with enhanced performance through interface engineering and post-treatment

“…The thermal decomposition behavior of residue organics and adsorbed hydrazine (see figure S5, supplementary materials), was derived from thermal gravimetric analysis (TGA) measurements. The removal of the organic residue and adsorbed hydrazine molecules was attributed to nominal weight loss [63,64], as featured in the TGA curve from T = 70 °C to approximately T = 110 °C. During removal of organic molecules, the electrical resistivity started to decrease abruptly from 75 °C (see figure S6, supplementary materials).…”