[CE(PSE4)(4)](9-) - A HIGHLY ANIONIC CE3+ SELENOPHOSPHATE COORDINATION COMPLEX

The reaction of Ce with the basic polychalcophosphate flux Rb10P4Se25 yielded the quaternary selenophosphate compound Rb9Ce(PSe4)(4). The di screte [Ce(PSe4)(4)](9-) anion possesses the highest charge observed i n a monometallic complex. The Ce3+ center is chelated by four bidentat e [PSe4](3-) ligands so it achieves a dodecahedral coordination geomet ry, and the complex belongs to the dodecahedral sub-class Id (D-2d-(4) over bar 2m), according to the Hoard and Silverton notation. The UV-V is, optical, IR spectroscopic and magnetism data for the compound are reported. (C) 1998 Elsevier Science S.A.