Copper mercaptides as sulfur dioxide indicators

Details Copper mercaptides as sulfur dioxide indicators Copper mercaptides as sulfur dioxide indicators

1978-06-16

1979-05-01

Turk, Arnold

Chemistry: physical processes

Physical processes

Crystallization

2604381, 422 56, 422 86, G01N 3122, G01N 2112

Patent

active

041521188

ABSTRACT:
Organophosphine copper(I) mercaptide complexes are useful as convenient and semiquantitative visual sulfur dioxide gas indicators. The air-stable complexes form 1:1 adducts in the presence of low concentrations of sulfur dioxide gas, with an associated color change from nearly colorless to yellow-orange. The mercaptides are made by mixing stoichiometric amounts of the appropriate copper(I) mercaptide and phosphine in an inert organic solvent.

REFERENCES:
patent: 3626742 (1971-12-01), Hogan et al.
patent: 3997296 (1976-12-01), Miller
Placa et al., Inorganic Chemistry, vol. 5, No. 3, Mar. 1966, pp. 405-410.
Snow et al., Inorganic Chemistry, vol. 12, No. 1, 1973, pp. 224-229.
Eller et al., Inorganic Chemistry, vol. 15, No. 10, 1976, pp. 2442-2445.
Eller et al., Inorganic Chemistry, vol. 16, No. 10, 1977, pp. 2454-2462.

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