Argon matrix investigation of the 1:1 molecular complexes of silicon tetrafluoride with water, methanol, and dimethyl ether

1983 ◽  
Vol 105 (18) ◽  
pp. 5742-5746 ◽  
Author(s):  
Bruce S. Ault
Keyword(s):  
Dimethyl Ether ◽  
Molecular Complexes ◽  
Silicon Tetrafluoride ◽  
Argon Matrix

Coordination of silicon tetrafluoride with alicyclic ethers and dimethyl ether

1968 ◽  
Vol 46 (6) ◽  
pp. 987-993 ◽  
Author(s):  
J. P. Guertin ◽  
M. Onyszchuk
Keyword(s):  
Ethylene Oxide ◽  
Dimethyl Ether ◽  
Condensed Phase ◽  
Silicon Tetrafluoride ◽  
Relative Order ◽  
Trimethylene Oxide

Tensimetric titrations at −78° of silicon tetrafluoride with ethylene oxide, trimethylene oxide, tetrahydrofuran, tetrahydropyran, and dimethyl ether prove the formation of only 1:2 complexes, SiF4•2-(ether). All are unstable at 25° and either dissociate completely, as do SiF4•2(CH2)4O, SiF4•2(CH2)5O, and SiF4•2(CH3)2O, or decompose into SiF4 and a polymethylene oxide polymer, as do SiF4•2(CH2)2O and SiF4•2(CH2)3O. Silicon tetrafluoride does not coordinate with 1,4-dioxane in the range −94 to 25° and less than 1 atm pressure. Condensed phase heats of dissociation of SiF4•2(ether) complexes follow the order (CH2)3O > (CH2)4O > (CH2)5O ≥ (CH2)2O > (CH3)2O, which suggests that this is the relative order of basicities towards SiF4.

Probing massive cold cores discovered by ISO in quiescent galactic molecular complexes

2002 ◽  
Vol 4 ◽  
pp. 133-133
Author(s):  
D. Teyssier ◽  
P. Hennebelle ◽  
M. Pérault
Keyword(s):  
Molecular Complexes
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