TY - JOUR
T1 - Helical and linear [K(As11)]2- chains
T2 - Role of solvent on the conformation of chains formed by Zintl anions
AU - Reber, Arthur C.
AU - Ugrinov, Angel
AU - Sen, Ayusman
AU - Qian, Meichun
AU - Khanna, Shiv N.
PY - 2009/5/12
Y1 - 2009/5/12
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=65449129982&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=65449129982&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2009.03.082
DO - 10.1016/j.cplett.2009.03.082
M3 - Article
AN - SCOPUS:65449129982
SN - 0009-2614
VL - 473
SP - 305
EP - 311
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 4-6
ER -