ChemInform Abstract: PREPARATION AND PROPERTIES OF DIMETHYLPHOSPHINIC ACID N-METHYLAMIDE AND DIMETHYLTHIOPHOSPHINIC ACID N-METHYLAMIDE

1978 ◽  
Vol 9 (52) ◽  
Author(s):  
H. SCHREM ◽  
J. WEIDLEIN
Keyword(s):  
Dimethylphosphinic Acid

Configuration of the methyl ester of dimethylphosphinic acid

1970 ◽  
Vol 19 (8) ◽  
pp. 1629-1633
Author(s):  
O. A. Raevskii ◽  
R. R. Shagidullin ◽  
I. D. Morozova ◽  
L. E. Petrova ◽  
F. G. Khalitov
Keyword(s):  
Methyl Ester ◽  
Dimethylphosphinic Acid

The IR spectra and structure of the methyl ester of dimethylphosphinic acid

1973 ◽  
Vol 18 (3) ◽  
pp. 364-366
Author(s):  
A. B. Remizov ◽  
�. G. Yarkova ◽  
I. Ya. Kuramshin ◽  
A. A. Muratova
Keyword(s):  
Methyl Ester ◽  
Ir Spectra ◽  
Dimethylphosphinic Acid

Vibrational Spectra and Normal Coordinate Treatment of Bis(2-ethylhexyl)phosphoric Acid

1969 ◽  
Vol 23 (5) ◽  
pp. 521-527 ◽  
Author(s):  
K. Nakamoto ◽  
J. R. Ferraro ◽  
G. W. Mason
Keyword(s):  
Phosphoric Acid ◽  
Raman Spectra ◽  
Sodium Salt ◽  
Vibrational Spectra ◽  
Infrared And Raman Spectra ◽  
Normal Coordinate ◽  
Dimethylphosphinic Acid ◽  
Dimeric Model ◽  
Coordinate Treatment ◽  
Phosphoric Acids

The infrared and Raman spectra of the bis(2-ethylhexyl)phosphoric acids [(C8H17O)2PO(OH), (C8H17O)2PO(OD)] and its sodium salt (C8H17O)2PO(ONa) were obtained from 4000–100 cm−1. On the basis of an approximate normal coordinate treatment and using a cyclic dimeric model, theoretical band assignments were made. These results were compared with those obtained for dimethylphosphinic acid.

1H NMR studies of proton transfer equilibria in hydrogen bonds – the role of the entropy

2001 ◽  
Vol 79 (9) ◽  
pp. 1376-1380
Author(s):  
Roland Langner ◽  
Georg Zundel
Keyword(s):  
Hydrogen Bonds ◽  
Proton Transfer ◽  
Methanesulfonic Acid ◽  
Negative Interaction ◽  
Nmr Studies ◽  
Left Hand ◽  
H Nmr ◽  
Proton Transfers ◽  
Proton Potential ◽  
Dimethylphosphinic Acid

The influence of the entropy on the proton transfer equilibria AH···B [Formula: see text]A–···H+B in the dimethylphosphinic acid (DMP)-N-base and in the methanesulfonic acid (MSA)-N-oxide hydrogen bonds is studied by 1H NMR spectroscopy as a function of the ΔpKa, i.e., the pKa of the base minus the pKa of the acid. It is shown that with increasing ΔpKa the proton transfers to the N-oxide acceptor. In the DMP + N-base family of systems, first the double-minimum proton potentials (ΔH = 0) occurs and only with further increasing ΔpKa do the POH···N [Formula: see text] PO–···H+N equilibria become symmetrical (ΔG = 0). ΔG and ΔH are connected by the Gibbs–Helmholtz equation, ΔG = ΔH –TΔS. Hence, the reason of this effect is the large negative interaction entropy term (ΔSI) arising from the large order around the polar structure, which shifts the equilibria strongly to the left-hand side. With the MSA-N-oxide hydrogen bonds a single-minimum proton potential was found. The minimum shifts with increasing ΔpKa from the donor to the acceptor of the O···H+···N hydrogen bonds. It is shown that with increasing ΔpKa the proton potential becomes on average symmetrical, whereas the proton is still largely on the left-hand side. This result is also explained by the large negative interaction entropy due to the order of the environment if the proton is at the acceptor B.Key words: entropy, hydrogen bonds, infrared, spectroscopy, proton transfer.

scholarly journals Ionic Dissociation of SiCl 4 : Formation of [SiL 6 ]Cl 4 with L=Dimethylphosphinic Acid

2020 ◽  
Vol 26 (36) ◽  
pp. 8003-8006
Author(s):  
Janine Kowalke ◽  
Jörg Wagler ◽  
Christine Viehweger ◽  
Erica Brendler ◽  
Edwin Kroke
Keyword(s):  
Ionic Dissociation ◽  
Dimethylphosphinic Acid
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