R. Eujen, B. Hoge, and D.J. Brauer (Inorg. Chem. 36, 1464 (1997)) prepared and
Chapter 12, Problem 12.11(choose chapter or problem)
R. Eujen, B. Hoge, and D.J. Brauer (Inorg. Chem. 36, 1464 (1997)) prepared and characterized several square-planar Ag(III) complex anions. In the complex anion [trans-Ag(CF3)2(CN)2], the Ag-CN groups are collinear. (a) Assuming free rotation of the CF3 groups (that is, disregarding the AgCF and AgCH angles), name the point group of this complex anion. (b) Now suppose the CF3 groups cannot rotate freely (because the ion was in a solid, for example). Structure (26) shows a plane that bisects the NC-Ag-CN axis and is perpendicular to it. Name the point group of the complex if each CF3 group has a CF bond in that plane (so the CF3 groups do not point to either CN group preferentially) and the CF3 groups are (i) staggered, (ii) eclipsed.
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