A Lewis basicity scale for nonprotogenic solvents: enthalpies of complex formation with boron trifluoride in dichloromethane

1985 ◽  
Vol 89 (7) ◽  
pp. 1296-1304 ◽  
Author(s):  
Pierre Charles Maria ◽  
Jean Francois Gal
Keyword(s):  
Complex Formation ◽  
Boron Trifluoride

Complex Formation between Anisole and Boron Trifluoride: Structural and Binding Properties

2008 ◽  
Vol 112 (51) ◽  
pp. 13600-13608 ◽  
Author(s):  
Tao Lin ◽  
Weijiang Zhang ◽  
Lichang Wang
Keyword(s):  
Complex Formation ◽  
Boron Trifluoride ◽  
Binding Properties

Solvation of the proton and the trifluoromethanesulfonate ion in eight solvents

1991 ◽  
Vol 69 (12) ◽  
pp. 1985-1988 ◽  
Author(s):  
Robert L. Benoit ◽  
Daniel Figeys
Keyword(s):  
Complex Formation ◽  
Boron Trifluoride ◽  
Trifluoromethanesulfonic Acid ◽  
The Other ◽  
Aromatic Diamine ◽  
Enthalpies Of Solution ◽  
Proton Sponge ◽  
Enthalpies Of Transfer ◽  
Ion Proton ◽  
Solvent Basicity

The enthalpies of solution of a sterically hindered aromatic diamine, 1,8-bis(dimethylamino)naphthalene (proton sponge, PS) and of its trifluoromethanesulfonate salt, and of trifluoromethanesulfonic acid have been determined in water, methanol (MeOH), ethanol (EtOH), pyridine (Py), dimethyl sulfoxide (Me2SO), dimethylformamide (DMF), acetonitrile (MeCN), and sulfolane (Sul). Single ion enthalpies of transfer for CF3SO3− and H+, from Me2SO to the other solvents, have been calculated using two extrathermodynamic assumptions, namely the tetraphenylarsonium–tetraphenylborate one and the recently proposed assumption based on the equality of transfers of uncharged PS and its conjugated cation PSH+. While both sets of transfer enthalpies using each assumption, for CF3SO3− and H+, differ by some 12 kJ mol−1 for water and MeOH, the values are in satisfactory agreement for Py, DMF, Me2SO, and Sul. These results support the validity of both extrathermodynamic assumptions for the nonprotogenic solvents, thus putting on firm ground the solvent basicity scale based on the enthalpy of transfer of H+ (in kJ mol−1): Py(−63) > DMF(−32) > Me2SO(−27) > EtOH(−1) ~ H2O(0) ~ MeOH(+2) > PC(+44) > MeCN(+55) > Sul(+68). These values correlate well with the enthalpies of complex formation with boron trifluoride. Key words: solvation, proton, trifluoromethanesulfonate ion, proton sponge, extrathermodynamic assumption.

CHEMISTRY OF THE TRIFLUOROMETHYL GROUP: PART I. COMPLEX FORMATION BY PHOSPHINES CONTAINING THE TRIFLUOROMETHYL GROUP

1960 ◽  
Vol 38 (1) ◽  
pp. 119-124 ◽  
Author(s):  
M. A. A. Beg ◽  
H. C. Clark
Keyword(s):  
Complex Formation ◽  
Boron Trifluoride ◽  
Trifluoromethyl Group ◽  
Bonding Properties ◽  
New Compounds ◽  
Group Part

The formation of co-ordination compounds of (CH3)3P, (CH3)2PCF3, CH3P(CF3)2, and P(CF3)3, with boron trifluoride and platinum (II) chloride has been studied. The properties of the new compounds (CH3)2PCF3.BF3, [(CH3)2PCF3]2PtCl2, [CH3P(CF3)2]2PtCl2 are described, and it is hence concluded that the stabilities of the boron trifluoride compounds decrease in the order.[Formula: see text]while for the platinum (II) complexes the order of stability is[Formula: see text]These two orders are related to the electronegativity of the trifluoromethyl group and its influence on the bonding properties of the phosphorus atoms.

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