[P(3)Se(7)](3-): a phosphorus-rich square-ring selenophosphate.
The new compound Cs(10)P(8)Se(20) features the heterotetracyclic [P(3)Se(7)](3-) anion, a phosphorus-rich four-membered-ring species that possesses a P-P-P unit and formally P(3+) and P(4+) centers. It crystallizes in the orthorhombic space group Pnnm with a = 26.5456(7) A, b = 8.0254(2) A, c = 11.9031(4) A, and Z = 2 at 100(2) K. The cyclic anion is cocrystallized with a [P(2)Se(6)](4-) anion. Electronic absorption, Raman, Fourier transform infrared, and solid-state (31)P NMR spectroscopy studies of Cs(10)P(8)Se(20) are reported.
Chung
In
I
Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA.
Holmes
Daniel
D
Weliky
David P
DP
Kanatzidis
Mercouri G
MG