261. The reaction between acetone and ammonia : the formation of pyrimidine compounds analogous to the aldoxans of späth

Bradbury, R. B.; Hancox, NC; Hatt, H. H.

doi:10.1039/jr9470001394

Cited by 30 publications

(11 citation statements)

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“…However, no similar phenomenon was observed with BNNS-NH 2 and BNNS-OH dispersed in ethanol and water over the same period. The phenomenon was attributed to the reaction between acetone and the amino groups , …”

Section: Results and Discussionmentioning

confidence: 99%

Boron Nitride Nanosheet Dispersion at High Concentrations

Jiang

Cai

Mateti

et al. 2021

ACS Appl. Mater. Interfaces

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There is an increasing demand for boron nitride nanosheets (BNNSs) for a range of applications such as advanced composite materials, ion/gas selective membranes, and energy storage. These applications require stable, high-concentration BNNS dispersions as a precursor, which is a challenge because BNNSs do not disperse easily. We report a simple, yet efficient, mechanochemical exfoliation technique to prepare functionalized BNNSs with excellent dispersibility in water and organic solvents. The resultant amino-modified BNNSs (BNNS-NH2) are stable in ethanol for 3 months at an unprecedented high concentration of 46 ± 2 mg/mL. We provide insights into the dispersibility mechanism for amino- and hydroxyl-functionalized BNNSs. High-concentration BNNS dispersions enable a facile painting method that can coat a uniform, insulating, and antioxidant BNNS layer on arbitrary surfaces. In addition, different functional groups enhance the selectivity of different ions of the functionalized BNNS membranes for water purification and other ion separation applications. These stable, high-concentration BNNS dispersions make many exciting applications possible.

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Section: Results and Discussionmentioning

confidence: 99%

Boron Nitride Nanosheet Dispersion at High Concentrations

Jiang

Cai

Mateti

et al. 2021

ACS Appl. Mater. Interfaces

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“…We have preliminarily reported the synthesis and the crystal structure of [Au(NHCMe 2 ) 2 ]OTf. [22] Acetonine (Scheme 1) was first characterized by Bradbury et al [23] in 1947 based on its molecular refraction and its reduction and hydrolysis products, although it could have been first prepared by Städeler [24] more than a century ago. It has been reported to form among the decomposition products of acetimine (NH CMe 2 ) [6] but it is best obtained from the reaction of acetone with ammonia, and many attempts are currently reported, most of them patents, to improve its synthesis.…”

Section: Introductionmentioning

confidence: 99%

The First Acetimine Gold(I) and Gold(III) Complexes and the First Acetonine Complexes

et al. 2001

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Ketimino(phosphino)gold(I) complexes of the type [Au[NR=C(Me)R']L]X (X = ClO4, R = H, L = PPh3, R'=Me (la), Et (2a); L=PAr3 (Ar=C6H4OMe-4), R'=Me (1b), Et (2b); L=PPh3, R=R'=Me (3); X= CF3SO3 (OTf), L=PPh3, R=R'=Me (3'); R=Ar, R'=Me (4)) have been prepared from [Au(acac)L] (acac = acetyl acetonate) and ammonium salts [RNH3]X dissolved in the appropriate ketone MeC(O)R'. Complexes [Au(NH=CMe2)2]X (X = C1O4 (6), OTf (6')) were obtained from solutions of [Au(NH3)2]X in acetone. The reaction of 6 with PPN[AuCl2] or with PhICl2 gave [AuCl(NH=CMe2)] (7) or [AuCI2(NH=CMe2)2]ClO4 (8), respectively. Complex 7 was oxidized with PhICl2 to give [AuCl3(NH=CMe2)] (9). The reaction of [AuCl(tht)] (tht = tetrahydrothiophene), NaClO4, and ammonia in acetone gave [Au(acetonine)2]ClO4 (10) (acetonine = 2,2,4,4,6-pentamethyl-2,3,4,5-tetrahydropyrimidine) which reacted with PPh3 or with PPN[AuCl2] to give [Au(PPh3)(acetonine)]ClO4 (11) or [AuCl(acetonine)] (12), respectively. Complex 11 reacts with [Au(PPh3)(Me2CO)]ClO4 to give [(AuPPh3)2(mu-acetonine)](ClO4)2 (13). The reaction of AgClO4 with acetonine gave [Ag(acetonine)(OClO3)] (14). The crystal structures of [Au(NH2Ar)(PPh3)]OTf (5), 6' and 10 have been determined.

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“…Acetonine was first characterized by Bradbury et al 4 in 1947, based on its molecular refraction and its reduction and hydrolysis products. It has been reported to form among the decomposition products of acetimine NHNCMe 2 , 5 but it is most frequently obtained from the reaction of acetone with ammonia; many attempts to improve its synthesis have recently been reported (most of them patents).…”

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confidence: 99%