The Crystal and Molecular Structure of Bis(Tetraphenyl Arsonium) Nitroprusside

E. E. CASTELLANO; O. E.PIRO; B. E. RIVERO

Acta Cryst. B

IUCr

Año: 1977 vol. 33 p. 1728 - 1732

[As(C6H5)4]2[Fe(CN)sNO] is monoclinic, space group P21/c, with a = 9.09(1), b = 21.43(2), c = 24.51(1) A, beta = 104.3(3) °, Z = 4. 1607 visual data were used. The final R is 0.120. The nitroprusside anion has a somewhat distorted octahedral configuration with Fe-N = 1.61(5) and Fe-C = 1.92 (2) A (mean). The two independent cations differ in the orientation of the phenyl groups. The packing of the structure is such that the ions are all relatively distant from each other, the shortest Fe---As distance being 6.53 A.