Synthesis and Structure of Semi(tetrahydrofuran-<i>O</i>)bispotassium Bis(2,3,4,5-tetraethylstibolide)

Abstract

The reaction of bis(cyclopentadienyl)zircona-2,3,4,5-tetraethylcyclopentadiene ( 1 ) with antimony trichloride yields 1-chloro-2,3,4,5-tetraethyl-1-stibole ( 2 ). The reduction with potassium gives semi(tetrahydrofuran- O )bispotassium bis(2,3,4,5-tetraethylstibolide) ( 3 ). The potassium stibolide columns are linked via K−Sb contacts of 3.618 Å, thus forming a wavelike layer structure. The molecular structure shows three crystallographically different metal cations. One potassium atom is located between two stibolide anions, whereas the other ones show additional K−O and K−Sb contacts of 2.681 and 3.618 Å, respectively.