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Communication

Zintl Phase Variations Through Cation Selection. Synthesis and Structure of A ₂₁Cd ₄Pn ₁₈ (A = Eu, Sr, Ba; Pn = Sb, Bi)

Supporting Info

Sheng-Qing Xia, and Svilen Bobev, *

Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716

Inorg. Chem., 2008, 47 (6), pp 1919–1921

DOI: 10.1021/ic800242a

Publication Date (Web): February 21, 2008

* To whom correspondence should be addressed: E-mail: bobev@udel.edu. Fax: +(1) 302 831-6335.

Abstract

Four new Zintl compounds, Ba ₂₁Cd ₄Sb ₁₈, Ba ₂₁Cd ₄Bi ₁₈, Sr ₂₁Cd ₄Bi ₁₈, and Eu ₂₁Cd ₄Bi ₁₈, have been synthesized and structurally characterized. Despite the similarity in their chemical formulas and regardless of their identical electronic requirements, the structures of the Ba compounds and the Sr and Eu compounds are subtly different. Due to the cations, a cleavage of a selected pnicogen−cadmium bond occurs and the structures adapt to a novel packing of the resultant heteronuclear anions.