Complex fluoroanions in solution. IX. BF3–anion complexes and their disproportionation

1978 ◽  
Vol 56 (21) ◽  
pp. 2764-2767 ◽  
Author(s):  
S. Brownstein ◽  
G. Latremouille
Keyword(s):  
Boron Trifluoride ◽  
Coupling Constants ◽  
Hydrogen Halides ◽  
Anion Complexes ◽  
Strong Acids

Complex fluoroanions have been prepared with boron trifluoride and perchlorate, nitrate, nitrite, acetate, formate, azide, cyanide, cyanate, thiocyanate, and thiophenolate ions. The complexes formed from the anions of the strong acids, except the hydrogen halides, do not disproportionate to BF2(anion)2−. Complexes of anions of weaker acids may disproportionate and, or, complex a second molecule of BF3. Regularities in fluorine–boron coupling constants are tabulated.

The reactions of some 5,6-Dihalogenocyclohex-2-ene-1,4-diones (1,4-Benzoquinone dihalides) in boron trifluoride diethyl etherate

1973 ◽  
Vol 26 (2) ◽  
pp. 333 ◽  
Author(s):  
RK Norris ◽  
S Sternhell
Keyword(s):  
Boron Trifluoride ◽  
Boron Trifluoride Etherate ◽  
Hydrogen Halides ◽  
Boron Trifluoride Diethyl Etherate ◽  
High Yields ◽  
Very High

Treatment of five 1,4-benzoquinone dihalides in boron trifluoride etherate gives very high yields of isomeric dihalogenohydroquinones. With the exception of the conversion of 5,6-dichlorocyclohex-2-ene-1,4- dione into 2,3-dichlorohydroquinone, which is a true keto-enol isomerization, these products arise through elimination of hydrogen halides followed by re-addition.

Normal Coordinate Analysis and Mean Amplitudes of Vibration in Acetonitrile-Boron Trifluoride

1971 ◽  
Vol 26 (8) ◽  
pp. 1346-1356
Author(s):  
V. Devarajan ◽  
S. J. Cyvin
Keyword(s):  
Boron Trifluoride ◽  
Normal Coordinate Analysis ◽  
Coupling Constants ◽  
Coriolis Coupling ◽  
Normal Coordinate ◽  
Mean Amplitudes Of Vibration ◽  
First Time

A complete normal coordinate analysis for the complex acetonitrile-boron trifluoride has been carried out for the first time. Mean amplitudes of vibration, Bastiansen-Morino linear shrinkages, and the most important Coriolis coupling constants have also been determined

Halogen exchange in reactions of boron halides with o-(trifluoromethyl)-phenyltrimethyl derivatives of silicon and tin

1970 ◽  
Vol 48 (24) ◽  
pp. 3856-3859 ◽  
Author(s):  
T. Chivers
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Carbon Tetrachloride ◽  
Magnetic Resonance ◽  
Boron Trifluoride ◽  
Potassium Fluoride ◽  
Coupling Constants ◽  
Boron Trichloride ◽  
Halogen Exchange ◽  
Boron Halides ◽  
Derivatives Of

The reaction of boron trifluoride with o-CF3C6H4SnMe3 in carbon tetrachloride gives o-CF3C6H4BF2, which with aqueous potassium fluoride is converted to K[o-CF3C6,H4BF3]. Boron trichloride and o-CF3C6H4SnMe3 undergo halogen exchange to give, after hydrolysis, o-CCl3C6H4B(OH)2. Halogen exchange also occurs between boron trichloride and o-CF3C6H4Y (Y = H, SiMe3) to give boron trifluoride and o-CCl3C6H4Y. The long range HF and FF nuclear magnetic resonance (n.m.r.) coupling constants observed for o-CF3C6H4-derivatives are briefly discussed.

Chemistry of phosphorus fluorides. Part III. The reaction of thiophosphoryl-fluoride with dimethylamine and some properties of the dimethylaminothio- phosphoryl fluorides

1968 ◽  
Vol 46 (4) ◽  
pp. 613-621 ◽  
Author(s):  
R. G. Cavell
Keyword(s):  
Volatile Compound ◽  
Spectroscopic Data ◽  
Boron Trifluoride ◽  
Fluoride Salt ◽  
Hydrogen Halides ◽  
Unstable Complex ◽  
Phosphorus Fluorides ◽  
Complex Ion

Dimethylamine reacts with thiophosphoryl fluoride with non-integral stoichiometry to yield the volatile compound dimethylaminothiophosphoryldifluoride and the solid products contained hexafluoro-phosphate and difluorodithiophosphate ions, and an unstable complex ion containing phosphorus and fluorine. The reaction of dimethylaminothiophosphoryldifluoride with dimethylamine to form bis-(dimethylamino)thiophosphorylfluoride has also been studied. The solid residues of this reaction contained hexafluorophosphate and difluorodithiophosphate ions and an unidentified phosphorus-fluoride salt. Dimethylaminothiophosphoryldifluoride did not complex with boron trifluoride but reacted with hydrogen halides to yield the halogenothiophosphoryldifluorides. Physical and spectroscopic data on the alkylaminothiophosphoryl fluorides are reported.

H3O+ ions in aqueous acid solutions. The infrared spectra revisited

1976 ◽  
Vol 54 (21) ◽  
pp. 3477-3482 ◽  
Author(s):  
Paul A. Giguère ◽  
Sylvia Turrell
Keyword(s):  
Hydrofluoric Acid ◽  
Ion Pairs ◽  
Acid Solutions ◽  
Ionic Charge ◽  
Experimental Conditions ◽  
Hydrogen Halides ◽  
Aqueous Acid ◽  
Previous Assignment ◽  
Acids And Bases ◽  
Strong Acids

We have re-examined the infrared absorption between 4000 and 800 cm−1 of aqueous solutions of the four hydrogen halides at concentrations up to saturation, and under better experimental conditions than heretofore. The new spectra confirm definitely our previous assignment of the three broad bands around 2900, 1730, and 1200 cm−1 to fundamental vibrations of the H3O+ ion. Other proposed interpretations are shown to be untenable; in particular that of Ackermann, based on alleged similarities in the spectra of strong acids and bases. In hydrofluoric acid, hydrogen-bonded ion pairs are responsible for the shifts of the H3O+ frequencies. There is no evidence in the spectra for higher species, such as H5O2+. We conclude that the H3O+ ion has an appreciably longer lifetime in concentrated aqueous acids than in water. It also forms much stronger hydrogen bonds than H2O because of its ionic charge.

Vibrational and thermal averaging of the indirect nuclear spin-spin coupling constants of CH4, SiH4, GeH4 and SnH4

1997 ◽  
Vol 91 (5) ◽  
pp. 897-907 ◽  
Author(s):  
SHEELA KIRPEKAR ◽  
THOMAS ENEVOLDSEN ◽  
JENS ODDERSHEDE ◽  
WILLIAM RAYNES
Keyword(s):  
Nuclear Spin ◽  
Coupling Constants ◽  
Spin Coupling ◽  
Spin Coupling Constants ◽  
Spin Spin Coupling

$\mathit{Ab\!-\!initio}$ Determination of Magnetic Interface Coupling Constants for Magnetic Multilayers

1997 ◽  
Vol 7 (11) ◽  
pp. 1299-1304 ◽  
Author(s):  
P. Weinberger ◽  
C. Sommers ◽  
U. Pustogowa ◽  
L. Szunyogh ◽  
B. Újfalussy
Keyword(s):  
Ab Initio ◽  
Magnetic Multilayers ◽  
Coupling Constants ◽  
Interface Coupling
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