language: en

DOI: 10.1002/zaac.200700527

Synthesis and Structure of the Novel Pentaselenidohexaarsenate(I,II) Cluster Anion [As 6 Se 5 ] 2

Anna Kromm and William S. Sheldrick*
Bochum,
Lehrstuhl für Analytische Chemie der Ruhr-Universität Bochum
Received November 26 th , 2007.

Abstract. Methanolothermal reaction of [MnCl 3 (9-ane-N 3 )] with As 2 Se 3 at 150 �C in the presence of Cs 2 CO 3 affords violet-coloured [Mn(9-ane-N 3 ) 2 ]As 6 Se 5 (1). Its novel tricyclic selenidoarsenate(I,II) anion [As 6 Se 5 ] 2<U+6E129> contains two five-membered [As 3 As(Se)Se] rings that are symmetry-related by a crystallographic C 2 axis passing through the common As I -As I bond between their respective first two ring members. The adjacent As I atoms in the individual rings are bridged by the Se atom of the third [As 4 Se] ring.

Keywords: Selenidoarsenate; Manganese; Cluster anion; Solvothermal synthesis; Crystal structure