Search results for "Propanoic acid"
showing 8 items of 8 documents
Flecainide acetate acetic acid solvates.
2011
Flecainide acetate forms acetic acid solvates with 0.5 and 2 acetic acid molecules. Powder X-ray diffraction, differential thermal analysis/thermogravimetric, infrared, and potentiometric titration were used to determine the composition of solvates. Flecainide acetate hemisolvate with acetic acid decomposes to form a new crystalline form of flecainide acetate. This form is less stable than the already known polymorphic form at all temperatures, and it is formed due to kinetic reasons. Both flecainide acetate nonsolvated and flecainide acetate hemisolvate forms crystallize in monoclinic crystals, but flecainide triacetate forms triclinic crystals. Solvate formation was not observed when flec…
Untersuchungen zur Reaktionsfähigkeit statistisch verteilter Estergruppierungen in Copolymeren aus Styrol und Acrylsäureestern
1974
Die Aminolyse der ortho- und para-Nitrophenylester von Propionsaure, Isobuttersaure, 4-Phenylbuttersaure und 4-Phenylvaleriansaure sowie von Copolymeren aus Styrol und geringen Mengen Acrylsaure wurde mit Butylamin in Dioxan untersucht. Bei grosem Aminuberschus reagieren die niedermolekularen Ester streng nach erster Ordnung, wobei die Reaktionsgeschwindigkeit durch Zugabe von Polystyrol nicht beeinflust wird. Fur Copolymere, deren Reaktionsgeschwindigkeit deutlich geringer ist, erhalt man dagegen keine Beziehung erster Ordnung, obwohl die Anfangsgeschwindigkeit der Gesamtkonzentration der Estergruppen direkt proportional ist. Bei den Copolymeren erhalt man annahernd die gleichen Aktivierun…
Studies on the antitumor activity of complexes of R2Sn(IV) with penicillamine enantiomers and with 3-thio-propanoic acid, and correlation with struct…
1990
Abstract The activity of diorganotin(IV) derivatives, with SnS bonds, against murine leukemia P-388, has been investigated. The water-soluble penicillamine (PenH2) complexes, Me2Sn(D-Pen), Me2Sn(L-Pen), Me2Sn(D-PenH)2 and Me2Sn(L-PenH)2, are essentially inactive, and do not show any dependence of the antitumor activity from the configuration about the chiral centre. The complexes with 3-thiopropanoic acid (H2Tpr), R2Sn(Tpr), are active for REt and Ph, in line with the general behaviour of R2Sn(IV) derivatives. The nature of the organotins in the vehicle of administration is investigated by 119Sn Mossbauer spectroscopy. The structures of solid state polymers, occurring in suspensions, are …
13C NMR, 1H NMR and IR spectra of a series of monochloroesters of aliphatic short chain carboxylic acids
1981
Abstract 13 C chemical shifts for 14 isomeric monochloroesters of aliphatic carboxylic acids from propanoic acid to hexanoic acid have been determined. Comparisons are made with the literature values for methyl monochloro-octanoate isomers. Substituent effects for all positions are given. Characteristic IR absorption bands are presented and comparisons are made with regard to the isomeric structure. Connections are suggested between observed trends in IR absorption frequencies and some “abnormal” chlorine substituent effects on 13 C chemical shifts. 1 H NMR spectra of these compounds are considered.
CCDC 161426: Experimental Crystal Structure Determination
2002
Related Article: Qian Yi Li, E.Vogel, A.H.Parham, M.Nieger, M.Bolte, R.Frohlich, P.Saarenketo, K.Rissanen, F.Vogtle|2001|Eur.J.Org.Chem.|2001|4041|doi:10.1002/1099-0690(200111)2001:213.0.CO;2-7
CCDC 680361: Experimental Crystal Structure Determination
2009
Related Article: T.Tuuttila, J.Lipsonen, J.Huuskonen, K.Rissanen|2009|Dyes Pigm.|80|34|doi:10.1016/j.dyepig.2008.04.007
CCDC 1938756: Experimental Crystal Structure Determination
2019
Related Article: Guillermo Fiorini, Luca Carrella, Eva Rentschler, Pablo Alborés|2019|New J.Chem.|43|16218|doi:10.1039/C9NJ03574E
CCDC 680360: Experimental Crystal Structure Determination
2009
Related Article: T.Tuuttila, J.Lipsonen, J.Huuskonen, K.Rissanen|2009|Dyes Pigm.|80|34|doi:10.1016/j.dyepig.2008.04.007