Accession Number:

AD0686014

Title:

COORDINATION OF SILICON TETRAFLUORIDE WITH ALICYCLIC ETHERS AND DIMETHYL ETHER,

Descriptive Note:

Corporate Author:

MCGILL UNIV MONTREAL (QUEBEC) DEPT OF CHEMISTRY

Personal Author(s):

Report Date:

1967-10-02

Pagination or Media Count:

7.0

Abstract:

Tensimetric titrations at -78C of silicon tetrafluoride with ethylene oxide, trimethylene oxide, tetrahydrofuran, tetrahydropyran, and dimethyl ether prove the formation of only 12 complexes, SiF4.2ether. All are unstable at 25C and either dissociate completely, as do SiF42CH24O, SiF4.2CH25O, and SiF4.2CH32O, or decompose into SiF4 and a polymethylene oxide polymer, as do SiF4.2CH22O and SiF4.2CH23O. Silicon tetrafluoride does not coordinate with 1,4-dioxane in the range -94 to 25C and less than 1 atm pressure. Condensed phase heats of dissociation of SiF4.2ether complexes follow the order CH23O CH24O CH25O or CH22O CH32O, which suggests that this is the relative order of basicities towards SiF4. Author

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE