Accession Number : AD0617165

Title :   HALOGENOID COMPLEXES.

Descriptive Note : Progress rept. no. 7, 30 Sep 64-1 Apr 65,

Corporate Author : COLORADO UNIV BOULDER

Personal Author(s) : Keller,R. N.

Report Date : 01 APR 1965

Pagination or Media Count : 3

Abstract : A very careful and exact determination of dissociation constants was completed for the following pseudo-halic acids: HCN, HOCN, HSCN, HN3, and HSeCN. The pKa values for these acids at 20C are: HCN, 9.36 = .01; HOCN, 3.70 = .02; HSCN, 0.96 = .6; HN3, 4.70 = .02; HSeCN, <<1. Preliminary data were obtained for relative rates of reduction of Co(NH3)5X(2+) ions (where X = Cl, Br, I, NCS, N3 etc.,) by Cr(2+). Approximate relative rates of 1:3:11 were found for the chlorine, bromine, and iodine complexes, respectively. When halogenoid ions such as N3(-) or SCN(-) are used in these reactions, rather inexplicable results were obtained so far. This study is being pursued further. A compound recently reported in the literature, presumably (Et4N)2Cu(NCO)4, has properties entirely different from this compound. This disagreement is being resolved. (Author)

Descriptors :   (*ACIDS, DISSOCIATION), (*HALIDES, COMPLEX COMPOUNDS), (*COMPLEX COMPOUNDS, REDUCTION(CHEMISTRY)), HYDROGEN COMPOUNDS, CYANIDES, CYANATES, THIOCYANATES, NITRIDES, SELENIUM COMPOUNDS, ENTROPY, ENTHALPY, COBALT COMPOUNDS, AMMONIUM COMPOUNDS, COPPER COMPOUNDS, REACTION KINETICS

Distribution Statement : APPROVED FOR PUBLIC RELEASE