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Rhenium hexafluoride

Rhenium hexafluoride, also rhenium(VI) fluoride, (ReF₆) is a compound of rhenium and fluorine and one of the seventeen known binary hexafluorides.

Synthesis

Rhenium hexafluoride is made by combining rhenium heptafluoride with additional rhenium metal at 300 °C in a pressure vessel.

Description

Rhenium hexafluoride is a liquid at room temperature. At 18.5 °C, it freezes into a yellow solid. The boiling point is 33.7 °C.

The solid structure measured at −140 °C is orthorhombic space group Pnma. Lattice parameters are a = 9.417 Å, b = 8.570 Å, and c = 4.965 Å. There are four formula units (in this case, discrete molecules) per unit cell, giving a density of 4.94 g·cm⁻³.

The ReF₆ molecule itself (the form important for the liquid or gas phase) has octahedral molecular geometry, which has point group (O_h). The Re–F bond length is 1.823 Å.

Use

Rhenium hexafluoride is a commercial material used in the electronics industry for depositing films of rhenium.

References

Washington Referendum 71

Referendum 71 (R-71) was a vote held in 2009 in which the people of Washington state confirmed Senate Bill 5688, a law extending the rights and obligations of domestic partnership in Washington state. The Bill was approved 53% to 47%; this marked the first time in the United States that voters had approved a statewide ballot measure that extended LGBT relationship rights, although Arizona voters had previously rejected a ban on same-sex marriages and civil unions in 2006 (only to pass civil-unions-neutral Proposition 102 two years later). The law went into effect the day the election was certified, December 3, 2009.

History

Senate Bill 5688 was signed by Governor Christine Gregoire on May 18, 2009. On July 25, 2009, the organization Protect Marriage Washington turned in 137,881 signatures to the Washington Secretary of State's office. 120,577 valid signatures were required to qualify the referendum for the November 2009 ballot. After a complete count of all submitted signatures, 122,007 were officially verified on September 1, 2009.