Helical and linear [K(As11)]2- chains: Role of solvent on the conformation of chains formed by Zintl anions

Arthur C. Reber, Angel Ugrinov, Ayusman Sen, Meichun Qian, Shiv N. Khanna

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Two chains of [K(As11)]2- clusters, one helical and one linear, have been synthesized and characterized by X-ray crystallography. The stoichiometries of the two conformations differ only in the number of solvent: 3 ethylenediamine per cluster for the helix and 2 for the straight chain. The solvent molecules interact with the potassium cations which link the Arsenic clusters. Theoretical investigations reveal that without solvent, the linear chain is most stable, because the K-As11 distances are minimized while the helix has increased spacing between the K cation and As11 which enhances binding between ethylenediamine and the potassium cations, stabilizing the helical assembly.

Original languageEnglish (US)
Pages (from-to)305-311
Number of pages7
JournalChemical Physics Letters
Volume473
Issue number4-6
DOIs
StatePublished - May 12 2009

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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