942602-85-9Relevant academic research and scientific papers
The effect of counter-ions on the supramolecular arrangement of (benzonitrile)[1,2-bis(diphenylphosphino)ethane](η5- cyclopentadienyl)iron(II) cations
Duarte, M. Teresa,Fatima,Piedade,Robalo, M. Paula,Jacob,Garcia, M. Helena
, p. m531-m534 (2006)
The title compound, [1,2-bis(diphenylphosphino)ethane]-(η5- cyclopentadienyl)(4-nitrobenzonitrile)iron(II) iodide, [Fe-(η5- C5H5)(C7H4N2O 2)(C26H4P2)]I, crystallizes in the non-centrosymmetric space group Cc, which is a promising result for obtaining quadratic non-linear optical properties. However, the packing shows that the iodide counter-ion promotes the cancellation of almost all the dipoles, resulting in a supramolecular motif of cationic chains aligned in opposite directions making an angle of 35.2°. The use of PF6- as counter-ion induces the crystallization of the complex in a centrosymmetric space group. These results show that the introduction of different counter-ions, of different size and geometry, allows specific and directional intermolecular interactions that can determine the formation of a particular type of crystal packing.
